Castleford, ID (83321): No EPA Water System
No EPA-registered water system mapped - county-level context only
The directly mapped EPA record for 83321 in Castleford, ID does not contain a complete violation count and source window. ZipCheckup does not infer a clean record from missing or partial data.
Data source: U.S. Environmental Protection Agency (EPA) SDWIS
At a Glance
- Water No EPA violations on record for the past 5 years.
- Radon EPA Zone 2 - moderate county-level potential, not a home measurement.
What’s Happening in Castleford, Idaho
No significant water quality or safety concerns have been reported for this area. The safety score is stable.
This Summer - what to check
Season-specific maintenance for home safety. Universal tasks - apply everywhere unless noted.
-
Water Heater
Flush sediment (1–2×/year). Cuts energy use and prevents bacterial growth in low-use hot-water pockets.
Source: DOE -
Wildfire & Smoke
Clear leaves and debris from gutters and the 30-ft home-ignition zone. Replace HVAC filters with MERV 13+.
Source: Firewise -
HVAC Filter
Peak AC run. Replace filters monthly during high pollen / wildfire-smoke days; standard interval otherwise.
Source: EPA IAQ
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How Castleford Compares
Safety Score vs. Twin Falls County and Idaho averages
| Metric | Castleford | Twin Falls County | Idaho |
|---|---|---|---|
| EPA Violations (total) | 0 | 15 | 24 |
County and state averages computed from 41,345 ZIP codes. Data: EPA SDWIS.
See incorrect data? Let us know
Score Breakdown
Overall Home Safety Score: Score unavailable
Required evidence is missing. Missing values remain unknown and are not imputed or renormalized.
Canonical components
Required domains
Coverage: 2 of 4 components and 2 of 3 domains observed.
Model 4.0.0; series home-safety-v4-cross-vertical.
Safety & Health (5) MODERATE
Compliance Alerts for 83321
3 issues flagged based on EPA data, state regulations, and housing age estimates.
Estimates based on EPA data, U.S. Census ACS housing vintage, and state regulations. Individual homes may vary.
No EPA Water System Mapped to This ZIP
ZIP code 83321 in Castleford, Idaho has no community water system directly registered with the EPA Safe Drinking Water Information System (SDWIS). This typically means residents rely on private wells, shared small systems that don't meet EPA reporting thresholds, or are served by a neighboring district that hasn't been cross-referenced to this ZIP.
The information below reflects county-level context for Castleford, Idaho - including any EPA violations, environmental hazards, or demographic factors that affect home safety in the surrounding area. It is not a water quality report for a specific utility.
If you know your water provider, search directly for its PWSID or name, or use the state SDWIS lookup to find the system serving your address.
Lead & Copper in Your Water
No Lead & Copper Rule sampling data available for systems serving this ZIP code.
Radon Risk
Radon Zone 2 - Moderate county-level potential (Twin Falls County)
EPA Zone 2 indicates moderate county-level radon potential. It does not estimate a home's radon level; testing is needed before any threshold comparison.
CO & Gas Safety
Gas Distribution Risk: Low (score: 0/100)
No gas distribution incidents recorded in this county since 2004.
The CPSC recommends CO detectors on every level of your home. Have gas appliances inspected annually by a licensed technician.
Wildfire & Smoke Risk
Smoke Risk: Moderate (score: 42/100)
72 wildfires recorded in this county over the past 5 years. Nearest recent wildfire: 8 km (5 miles).
Monitor air quality at AirNow.gov during fire season (June–November). A HEPA air purifier can reduce indoor PM2.5 by up to 80% during smoke events.
Earthquake & Seismic Risk
Risk Rating: Very Low (score: 3.2/50)
| Metric | Value |
|---|---|
| Risk Score | 3.2 |
| Risk Rating | Very Low |
| Annual Frequency | < 0.001 damaging events/yr |
| Expected Annual Loss | $98K (Very Low) |
Monitor seismic activity at the USGS Earthquake Map. Secure heavy furniture, maintain an emergency kit, and know your gas shutoff location.
Superfund Site Proximity
Proximity Risk: Very Low (score: 0/100)
Nearest NPL site: null at 62.1 miles (99.9 km).
| Radius | NPL Sites |
|---|---|
| Within 5 km (3.1 mi) | 0 |
| Within 10 km (6.2 mi) | 0 |
| Within 25 km (15.5 mi) | 0 |
Search nearby sites at the EPA Superfund Site Search. If you garden or use well water near an NPL site, consider soil and water testing.
Violation Summary
Energy Costs in ID
Residential electricity rate: 12.70¢/kWh - 25% below the national average (17.0¢/kWh).
Lower electricity rates in Idaho make electric appliances and heat pumps a cost-effective choice compared to other states.
Energy Sources
Idaho generates 69.9% of its electricity from renewable sources - 43% above the national average of 26.9%. Including nuclear, 69.9% of the state's power is carbon-free (EIA 2025).
| Source | Share |
|---|---|
| Hydroelectric | 46.8% |
| Natural gas | 27.5% |
| Wind | 14.9% |
| Solar | 7.8% |
Need help with your water quality?
Typical cost: Water test: typically $20–$50 (DIY kit) · Professional inspection: $150–$400
Find the Right Water FilterFree tip: Let cold water run for 2 minutes before drinking — this helps flush lead from your pipes.
What You Can Do
- Review your annual Consumer Confidence Report (CCR) - Your utility publishes this each July
- Test your home's water - Especially if you have older plumbing (pre-1986) that may contain lead
- Stay informed - Bookmark this page to check for updates on your water quality
Need help with water testing or filtration?
Typical cost: Water test: typically $20–$50 (DIY kit) · Professional inspection: $150–$400
Find the Right Water FilterFree tip: Let cold water run for 2 minutes before drinking — this helps flush lead from your pipes.
Other Water Quality Reports in Idaho
- 83201 (Pocatello) - 3 violations
- 83202 (Pocatello) - 22 violations
- 83203 (Fort Hall)
- 83204 (Pocatello) - 3 violations
- 83205 (Pocatello)
- 83206 (Pocatello)
- 83209 (Pocatello) - 3 violations
- 83210 (Aberdeen)
- 83211 (American Falls) - 11 violations
- 83212 (Arbon)
- 83213 (Arco)
- 83214 (Arimo)
- 83215 (Atomic City)
- 83217 (Bancroft)
- 83218 (Basalt)
- 83220 (Bern)
- 83221 (Blackfoot) - 93 violations
- 83223 (Bloomington)
- 83226 (Challis)
- 83227 (Clayton)
Nearby Water Quality Reports
- 83316 (Buhl) - 7 mi - 22 violations
- 83328 (Filer) - 14 mi - 16 violations
- 83355 (Wendell) - 18 mi
- 83332 (Hagerman) - 20 mi
- 83301 (Twin Falls) - 21 mi - 19 violations
- 83303 (Twin Falls) - 21 mi
- 83338 (Jerome) - 23 mi - 63 violations
- 83302 (Rogerson) - 25 mi
- 83341 (Kimberly) - 26 mi - 3 violations
- 83334 (Hansen) - 29 mi
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). No EPA-registered water system is mapped to ZIP 83321. To look up the system serving a specific address, use the state SDWIS search tool.
Frequently Asked Questions
Is the tap water in 83321 safe to drink?
No EPA-registered public water system is mapped to ZIP 83321, so there is no federal water quality record to assess. Residents in this area are typically served by private wells or very small systems below EPA reporting thresholds. If you rely on a private well, the CDC recommends testing it at least once a year for bacteria, nitrates, and any local contaminants of concern.
Where does 83321's water come from?
There is no community water system directly registered with the EPA for ZIP 83321. Most residents in this area rely on private wells drawing from groundwater, or are served by a neighboring district that isn't cross-referenced to this ZIP in federal data. Check with your local county health department to confirm your water source.
How can I get my water tested?
Since no EPA-registered water utility is mapped to ZIP 83321, contact your local county health department or hire a certified lab for independent home water testing. The EPA recommends testing private wells at least once a year for bacteria, nitrates, and any local contaminants of concern.
Does 83321 have lead in the water?
No Lead and Copper Rule sampling data is currently available in EPA records for water systems serving ZIP code 83321. If you are concerned about lead, contact your water utility or have your tap water independently tested.
What is the radon risk in 83321?
ZIP code 83321 (Twin Falls County) falls in EPA Radon Zone 2, indicating moderate radon potential. Zone 2 areas have moderate radon potential, and the EPA recommends considering radon testing for homes in this area.
USGS reports that 4 of the top compounds applied across the surrounding county are flagged by the EPA for drinking-water monitoring - see the agricultural pesticide-use section
Childhood Environmental Risk Score - 83321
Low RiskThis ZIP's score is higher than 13% of U.S. ZIP codes and 24% of those in Idaho - a relative ranking, not a verdict on any home.
Risk Factor Breakdown
Housing age is the largest contributor to this ZIP's score. Homes built before 1978 are more likely to contain lead paint, and chips and dust are a common exposure path for young children. The EPA recommends a lead-paint inspection before renovating an older home.
- Children under 6 are most vulnerable to lead exposure - there is no safe level of lead in blood
- Test your home's drinking water, especially if your home was built before 1986
What families can do
Here are calm, practical steps families in this ZIP can consider - informational guidance, not cause for alarm.
No specific actions are flagged for this ZIP. The general guidance above still applies to every family.
Know a family in 83321? A free 30-second ZIP check shows them the same lead, water, and housing data.
Lead Pipe Replacement Funding for Idaho
Key LCRI Deadlines
What This Means for You
- If your home was built before 1986, it may have lead service lines
- Your water utility is required to inventory and replace lead lines at no cost to you
- Contact your water utility to check if your address is in their inventory
Source: EPA DWSRF Lead Service Line Replacement Program, FY2025 Allotment Memorandum.
Active Alerts in Idaho
0 active weather alerts in Idaho. Severe weather can affect your water quality and home safety.
Environmental Hazards (10) MODERATE
Air Quality for 83321
Air quality is acceptable. However, there may be a risk for some people, particularly those who are unusually sensitive to air pollution. Consider reducing prolonged outdoor exertion if you experience symptoms.
County-level hazard data for Twin Falls
These are county-level federal records for Twin Falls, the county that contains ZIP code 83321. They describe the whole county, not this ZIP code specifically, and are provided for regional context.
Sources: U.S. Army Corps of Engineers National Inventory of Dams, NOAA Storm Events Database, EPA air-quality design values, EPA annual Air Quality Index by county, a USGS domestic-well arsenic model, and a USGS landslide-susceptibility model. All figures are county-level and do not reflect conditions at any single address.
Termite Risk for 83321
Slight Risk ZoneNot required for VA loans; optional
No mandatory inspection
Termite Damage in the U.S.
- Termites cause an estimated $5 billion in property damage annually in the United States, according to the USDA.
- Standard termite treatment costs $225–$2,500; fumigation for severe infestations: $2,000–$8,000.
- Homeowner insurance typically does not cover termite damage, as it is considered preventable.
What Homeowners Should Know
- Annual termite inspections are recommended in moderate-to-heavy risk zones. Early detection can prevent thousands in repair costs.
- VA and FHA loans require a clear NPMA-33 (Wood Destroying Insect Inspection Report) for closing in most states.
- Warning signs: mud tubes on foundation walls, hollow-sounding wood, discarded wings near windows, and frass (droppings) near baseboards.
- Preventive treatment ($200–$900 per year) is far less expensive than structural damage repair, which averages $3,000 and can exceed $50,000.
- Even in lower-risk zones, subterranean termites can be active. Consider an inspection if purchasing an older home or if you notice warning signs.
Source: USDA Forest Service Termite Infestation Probability (TIP) zones, VA/FHA lender requirements, Idaho pest control regulations. Inspection cost estimates reflect typical market rates and may vary by provider, property size, and location. This information is for general guidance only.
Pest Risk for 83321
Low Pest Pressurerodents, carpenter ants, stink bugs, bed bugs and mosquitoes
- West Nile activity zone
Required for VA loans in all states; not state-mandated
Up to $5,000 per violation
Why This Matters
- Health risks: Mosquitoes transmit West Nile virus (1,000+ U.S. cases annually). Ticks spread Lyme disease (estimated 476,000 cases/year per CDC). Rodent droppings can carry hantavirus.
- Property damage: Carpenter ants and termites cause billions in structural damage annually. Rodents gnaw wiring, creating fire hazards.
- Food safety: Cockroaches and rodents contaminate food preparation areas and can trigger allergies and asthma, especially in children.
- Even in lower-pressure regions like Idaho, indoor pests (bed bugs, rodents) remain a concern. Inspect when purchasing a home or if you notice signs of activity.
Common Questions
Source: CDC vector-borne disease surveillance, EPA pesticide regulation data, Idaho pest control board, NPMA pest prevalence maps. Inspection cost estimates reflect typical market rates and may vary by provider, property size, and location. This information is for general guidance only.
Wildfire & Smoke Risk Profile
Wildfire Smoke Safety Tips
- Air purifier with HEPA filter: run in the room where you spend the most time. Close windows and doors during smoke events.
- N95 or KN95 masks: standard cloth and surgical masks do not filter fine particulate matter (PM2.5) from wildfire smoke.
- Seal gaps: use wet towels or tape around doors and windows to reduce smoke infiltration during poor air quality days.
- Monitor AQI: check AirNow.gov daily during fire season. AQI above 100 = unhealthy for sensitive groups; above 150 = unhealthy for everyone.
- Create a clean room: designate one room with the air purifier running, keep it sealed, and limit time outdoors when AQI is elevated.
Protect Your Indoor Air from Wildfire Smoke
A HEPA air purifier can reduce indoor PM2.5 by up to 80% during smoke events. Portable units for a single room start at $80. Whole-home solutions start at $300.
Paid Partner Product links may earn a commission - see our disclosure.
Earthquake & Seismic Risk Profile
Earthquake Preparedness Tips
- Secure heavy furniture: anchor bookshelves, water heaters, and large appliances to wall studs. Unsecured items cause most earthquake injuries.
- Emergency kit: water (1 gallon per person per day for 3 days), non-perishable food, flashlight, batteries, first aid kit, wrench to turn off gas. Keep kits at home and in your car.
- Know how to shut off gas: locate the gas meter shutoff valve and keep a wrench nearby. Gas leaks are a leading cause of post-earthquake fires.
- Drop, Cover, Hold On: during shaking, drop to hands and knees, take cover under a sturdy table, and hold on. Do not stand in doorways or run outside.
- Structural retrofit: homes built before 1980 may need foundation bolting or cripple wall bracing. FEMA's earthquake resources offer guidance on retrofitting.
- USGS ShakeMap: monitor real-time and recent seismic activity at earthquake.usgs.gov.
Build Your Earthquake Preparedness Kit
FEMA recommends every household in a seismic zone maintain a 72-hour emergency kit. Pre-assembled kits start at $40 and include water, food, first aid, and tools.
Paid Partner Product links may earn a commission - see our disclosure.
Mold Risk Assessment for 83321
Very Low RiskWinter humidity (68%) remains elevated in this area. Condensation on cold surfaces creates mold-favorable conditions even in cooler months. Summer humidity averages 36%.
Why Mold Matters
- The CDC and EPA identify mold as a significant indoor health hazard. Common symptoms include respiratory irritation, allergic reactions, and asthma exacerbation.
- Mold begins growing within 24–48 hours on damp surfaces when relative humidity exceeds 60%. Bathrooms, basements, and crawl spaces are most vulnerable.
- Professional mold remediation costs $1,500–$9,000 on average. Homeowner insurance often excludes mold coverage unless caused by a "covered peril."
- Homes built before 1980 typically lack modern vapor barriers and ventilation systems, increasing moisture infiltration risk.
Prevention Recommendations
- Keep indoor humidity below 50% using ventilation or a dehumidifier in moisture-prone areas (bathrooms, basements, laundry rooms).
- Ensure proper ventilation: use exhaust fans in bathrooms and kitchens, and keep attic and crawl space vents unblocked.
- Fix leaks immediately. Even small plumbing leaks can create mold-favorable conditions within 48 hours.
- Monitor indoor humidity with a hygrometer ($10–$20). Target 30–50% year-round.
Respiratory Risk Snapshot
Moderate RiskSuperfund Sites & Soil Contamination Risk
What Are Superfund NPL Sites?
The National Priorities List (NPL) is the EPA's list of the most contaminated sites in the United States. These sites are eligible for federal cleanup funding under CERCLA (the "Superfund" law). Common contaminants include heavy metals, volatile organic compounds (VOCs), pesticides, and industrial solvents that can leach into soil, groundwater, and air.
- Active Cleanup: EPA is investigating or remediating the site - contamination may still be present.
- Construction Complete: Physical cleanup is done, but long-term monitoring continues.
- Deleted: Site meets EPA cleanup standards and has been removed from the NPL.
Know What's in Your Soil
If you live near a Superfund site, a home soil test kit can detect heavy metals, lead, and other contaminants - especially important if you garden, have children, or use well water.
Paid Partner Product links may earn a commission - see our disclosure.
Agricultural pesticide use in the surrounding county
USGS estimates how many kilograms of agricultural pesticides are applied each year in this ZIP code’s surrounding county, plus the five most-applied compounds. These are county-level use estimates, not a measurement of any pesticide in the tap water served to this ZIP code.
Top compounds by volume
The five compounds applied in the largest amounts across this county. Where the EPA sets a drinking-water reference limit (MCL) for a compound, that limit is shown for context - it is a regulatory reference, not a finding of any concentration in this ZIP code’s water.
-
Moderate water concernGLYPHOSATEHerbicide · 56.2k kg/yr · EPA drinking-water reference limit: 700 ppb
-
High water concernALACHLORHerbicide · 7.6k kg/yr · EPA drinking-water reference limit: 2 ppb
-
High water concernMETOLACHLORHerbicide · 5.8k kg/yr
-
High water concernCHLORPYRIFOSInsecticide · 5.3k kg/yr
-
Low water concernPENDIMETHALINHerbicide · 5.1k kg/yr
4 of the top compounds are ones the EPA flags for drinking-water monitoring - see the drinking-water section above
What this means
- These figures describe pesticide application across the surrounding county, not the drinking water at this address.
- An EPA Maximum Contaminant Level (MCL) is a regulatory reference for how much of a compound is allowed in finished tap water - it is not a finding of contamination at this ZIP code.
- Tested drinking-water results from the local water system - when reported - appear in the drinking-water section of this report.
Methodology: Annual county pesticide-use estimates are from the USGS Pesticide National Synthesis Project, mapped from county FIPS to ZIP code. EPA Maximum Contaminant Levels are reproduced from federal drinking-water regulations and are reference points only.
Informational only. County-level agricultural pesticide-use estimates are not a measurement of any pesticide in the drinking water served by this ZIP code, nor an assessment of health risk. Tested drinking-water results, when reported by the local water system, appear in the drinking-water section above.
Home & Infrastructure (6) OK
Housing Profile for 83321
Based on U.S. Census data (ACS B25034), there are 228 housing units in this ZIP code. The median home was built around 1988, making it roughly 38 years old.
When Homes Were Built
What This Means for Home Equipment
Homes from the 1988s are approaching or past their first major equipment replacement cycle:
- Water heater: estimated ~2 years old
- HVAC system: estimated ~4 years old
- Plumbing: likely Copper
Home Value Context
Estimated median home value in this ZIP code based on Census ACS data. Safety remediation costs include water filtration, lead abatement, radon mitigation, and flood insurance where applicable.
Equipment Age Estimate for 83321
Based on Census data, the median home in this ZIP was built in 1988 (~38 years old). 56% of homes were built before 1986.
The EPA Lead and Copper Rule Improvements (LCRI), finalized October 2024, requires all water utilities to:
- By October 2027: Complete a lead service line inventory and notify all customers with lead or unknown lines
- By ~2037: Replace 100% of lead service lines (mandatory 10-year deadline)
- New action level: Lowered from 15 ppb to 10 ppb - more homes now trigger mandatory action
56% of homes in ZIP 83321 were built before 1986 - the year lead solder was banned. If you receive a notification letter from your water utility, your home likely has lead service lines or lead solder connections.
- Get your water tested for lead (request a test kit from your utility at no cost)
- Install a certified lead-reducing filter (NSF/ANSI 53)
- Contact your utility about replacement assistance - costs run $5,000–$15,000, utilities may cover a portion under LCRI
- Have a plumber inspect your service line connection
Likely pipe material: Copper
Estimates based on U.S. Census ACS housing vintage data and typical equipment lifespans. Actual conditions vary by home.
Infrastructure Decay & Disruption
Water pipe decay
Local water mains have an estimated 9 years of modeled service life remaining.
Bridge condition (FHWA NBI)
Bridge figures are from the Federal Highway Administration's National Bridge Inventory. They describe area-level structural ratings, not the safety of any specific bridge.
Bridge condition - FHWA NBI 2024 annual release
Of 126 bridges classified within this ZIP code's surrounding county, 4 are classified Poor by FHWA NBI 2024.
Good (16) · Fair (106) · Poor (4)
FHWA classifies bridges as Good (rating 7-9), Fair (5-6), or Poor (0-4) based on biennial inspections of deck, superstructure, substructure, and culvert components.
Counts are county-level aggregated; multiple ZIP codes within the same county share these counts. No per-bridge or per-structure-ID claim is made.
Source: FHWA National Bridge Inventory, 2024 annual release.
Gas pipeline incident history
PHMSA records no reported gas-distribution pipeline incidents on file for this area.
Source: U.S. Pipeline and Hazardous Materials Safety Administration (PHMSA) historical incident data.
What this means
- This score blends water-pipe decay, bridge condition, gas-pipeline incident history, and a service-disruption evidence indicator into one area-level measure of infrastructure stress.
- It describes the infrastructure around a home, not the condition of the home itself, and it is a modeled estimate rather than an engineering assessment.
- Aging water mains raise the chance of breaks and service interruptions; a plumber can inspect a home's own supply line and shut-off valve.
Methodology: Water-pipe decay is modeled with an exponential-decay bathtub curve from Census ACS housing age, EPA ECHO compliance records, and EPA infrastructure-needs data. Bridge condition is from the FHWA National Bridge Inventory; gas-pipeline incidents are from PHMSA. The service-disruption evidence indicator combines available housing-age and EPA violation records without claiming a probability or forecast. The stress score is a weighted composite of these four signals.
All figures are modeled estimates from public federal data. They are not engineering assessments, predictions of failure, or a judgment about any specific structure or utility.
Power outages in Twin Falls
Electricity outages reported by utilities in Twin Falls and tracked by the U.S. Department of Energy's EAGLE-I program in 2024. These figures describe the county, not conditions at ZIP code 83321.
County-level figures, not a measurement at this address. Based on reported 15-minute intervals: intervals reported with no value are excluded, never counted as zero. Counties and years without data are omitted rather than shown as zero. Source: DOE/ORNL EAGLE-I, licensed CC BY 4.0.
HVAC System Health for 83321
Lower electricity rates in Idaho (12.70¢/kWh) help offset HVAC costs, but an aging system still wastes energy. Modern high-efficiency systems can reduce consumption by 20–40%.
Seasonal HVAC Tips for Idaho
- Schedule furnace tune-up before first cold snap
- Replace air filter (every 1–3 months)
- Check thermostat calibration
- Insulate exposed ductwork in attic/crawlspace
- Seal drafts around windows and doors
- Check carbon monoxide detectors (gas furnace)
- Schedule bi-annual professional inspection
Common HVAC Issues for 1988-Era Homes
- Aging compressor - most compressors last 12–15 years; may need replacement soon
- Duct leaks - connections loosen over time, wasting 20–30% of conditioned air
- Lower SEER rating - systems from 2000s are typically 10–13 SEER vs. today's 15–20+ SEER
- Thermostat upgrades - older thermostats lack programming features that save 10–15% on energy
The Department of Energy requires all NEW furnaces manufactured after December 18, 2028 to meet 95% AFUE (condensing furnaces). Current standard is 80% AFUE.
What this means for you:
- 80% AFUE non-condensing furnaces will no longer be available for purchase
- Condensing furnaces require PVC venting (additional $1,500–$2,500 for retrofit)
- If the furnace is approaching end of life, consider replacing before the deadline to potentially save on installation costs
- Your existing furnace can continue operating - this applies only to NEW equipment
HVAC Questions for 83321
How do I know if my HVAC system needs replacement?
Key signs include: the system is over 15 years old, frequent repairs (more than 2 per year), uneven heating/cooling between rooms, rising energy bills despite normal use, and unusual noises or odors. Based on census data, the median home in 83321 was built in 1988, putting the estimated HVAC system age at ~4 years.
What SEER rating should I look for in a new HVAC system?
As of 2023, the federal minimum is SEER2 15 for central AC in the southern U.S. and SEER2 14 in the north. For Idaho, look for at least SEER 16–18 for good efficiency. Higher SEER ratings (20+) cost more upfront but save more in areas with high electricity rates. ENERGY STAR certified units are a reliable starting point.
How much does HVAC replacement cost in Idaho?
A full HVAC replacement (furnace + AC) typically ranges from $5,000–$12,000 depending on system size, efficiency rating, and ductwork condition. Heat pump systems range from $4,000–$10,000. Federal tax credits (25C) cover up to 30% of the cost for qualifying heat pumps and high-efficiency systems. Check our rebates page for Idaho-specific incentives.
What refrigerant does my AC use and why does it matter?
If your AC was installed before 2010, it likely uses R-22, which was banned in 2020 and now costs $50–$150/lb. Systems from 2010–2024 typically use R-410A, which is being phased down (AIM Act 2025). New systems use R-454B or R-32. When your current system needs major repair, the refrigerant type significantly affects whether repair or replacement makes more economic sense.
Should I replace my furnace before the 2028 efficiency deadline?
If the furnace in a home is over 15 years old and the area has a cold/moderate climate, planning ahead is wise. After December 2028, only 95% AFUE condensing furnaces will be available. These require PVC venting - retrofitting an older home for PVC can cost $1,500–$2,500 on top of the furnace price. Replacing before the deadline with a standard 80% AFUE unit may be more cost-effective if the venting isn't PVC-ready.
HVAC age estimate based on U.S. Census ACS housing vintage data and a 17-year replacement cycle. Actual system age varies by home.
Appliance Age Estimates for 83321
Median home built in 1988 (~38 years old). Appliance ages estimated from typical replacement cycles.
1 appliance likely is near or past typical replacement age.
How Water Quality Affects Appliance Lifespan
Water conditions in Castleford directly impact how long your appliances last.
Homes built before 1996 have likely gone through 2+ full appliance replacement cycles. If original appliances remain, they are well past expected lifespan.
Appliance Maintenance FAQ
How often should I flush my water heater?
Flush your tank water heater at least once a year to remove sediment buildup. In areas with hard water, every 6 months is recommended. Sediment reduces heating efficiency and accelerates tank corrosion, shortening lifespan by 2–4 years.
When should I replace my dishwasher vs. repair it?
If your dishwasher is over 9 years old and the repair costs more than 50% of a new unit, replacement is generally more cost-effective. Common signs: dishes not getting clean, water pooling after cycles, or rust spots on the interior.
Does a water softener really extend appliance life?
Yes. A water softener can extend water heater lifespan by up to 30% and reduce dishwasher and washing machine maintenance by preventing mineral scale buildup on heating elements, valves, and spray arms. The Battelle Memorial Institute found that softened water kept water heaters at original factory efficiency over a 15-year period.
Estimates based on U.S. Census housing vintage data and manufacturer-average replacement cycles. Actual appliance age depends on renovation history and maintenance.
Electrical Safety for 83321
Median home built in 1988 (~38 years old).
Common Electrical Issues for 1988-Era Homes
- Aging circuit breakers - breakers can weaken over time and fail to trip during overloads, creating fire hazards
- Insufficient circuits - homes from this era may lack dedicated circuits for kitchen, bathroom, and laundry areas
- Missing GFCI/AFCI protection - current code requires GFCI in wet areas and AFCI in bedrooms; older homes often lack both
- Outdated panel capacity - 100–150 amp panels may be insufficient for modern loads (heat pumps, EV charging, home office)
⚠️ Insurance Compliance Alert
56% of homes in 83321 were built before 1986 - the era when Federal Pacific (FPE StabLok), Zinsco, and Challenger electrical panels were commonly installed.
These panels have a documented 60%+ breaker failure rate and are refused by major insurance companies including State Farm, Allstate, and Citizens (FL).
If you receive an insurance non-renewal notice or 4-point inspection failure:
- Typical deadline: 30 days to replace panel
- Replacement cost: $1,500–$4,000
- Failure to replace: insurance cancellation → mortgage default risk
Insurance blacklist: State Farm, Farmers, Allstate, USAA, Mercury, Citizens (FL), Nationwide.
When to Call an Electrician
- Burning smell from outlets or panel
- Frequent breaker trips
- Sparking or discolored outlets
- Buzzing sounds from wiring or panel
- Before buying a home (especially pre-1980)
- After any water damage or flooding
- Before adding major appliances or EV charger
- If your panel is 25+ years old
Electrical Safety Tips
- Never use a fuse with a higher amperage rating than the circuit is designed for
- Label all breakers clearly in your electrical panel
- Keep 3 feet of clearance in front of your electrical panel
- Test GFCI outlets monthly using the built-in test button
- Replace any cracked or warm outlet covers immediately
- Do not daisy-chain power strips or extension cords
Homes built before 1996 should have their electrical panel and GFCI protection reviewed, especially if no upgrades have been made.
Electrical Safety Questions for 83321
How do I know if my electrical panel needs an upgrade?
Key signs include: frequent breaker trips, a panel over 25 years old, fuses instead of circuit breakers, visible rust or corrosion, and a panel rated below 200 amps if you have modern appliances, HVAC, or an EV charger. Based on census data, the median home in 83321 was built in 1988 - homes of this age often have panels that don't meet current electrical demands.
How much does an electrical panel upgrade cost?
A panel upgrade from 100 to 200 amps typically costs $1,500–$4,000 depending on your location and the complexity of the work. If the meter base or service entrance also needs replacement, costs can reach $4,000–$6,000. Rewiring a full home (common in pre-1960 homes) ranges from $8,000–$15,000+ depending on size and accessibility.
Is aluminum wiring dangerous?
Aluminum wiring itself is not inherently dangerous, but connections between aluminum wiring and copper devices (outlets, switches) can overheat due to differential thermal expansion. The Consumer Product Safety Commission (CPSC) found that homes with aluminum wiring are 55 times more likely to have fire-hazard conditions. If your home has aluminum wiring, a qualified electrician can install COPALUM or AlumiConn connectors to make connections safe.
Is my home likely to have a Federal Pacific or Zinsco panel?
These panels were installed primarily between 1960 and 1985. Based on census data, 56% of homes in 83321 were built during this era. If your home was built in this period and the panel has never been replaced, there is a meaningful chance it contains an FPE StabLok or Zinsco panel. Look for the brand name on your breaker panel door.
Electrical risk assessment based on U.S. Census ACS housing vintage data. Actual wiring and panel condition varies by home and renovation history.
CO & Gas Safety Profile
CO & Gas Safety Tips
- Install CO detectors on every level of your home and near sleeping areas. Replace batteries annually and units every 5-7 years.
- Know gas leak signs: rotten egg smell, hissing sounds near gas lines, dead vegetation near pipelines, bubbling in standing water.
- Annual inspection: have a licensed technician inspect gas appliances (furnace, water heater, stove) every year.
- Emergency: if you smell gas, leave immediately, do not use electrical switches, and call 911 or your gas company from outside.
Protect Your Home from Carbon Monoxide
The CPSC recommends a CO detector on every level. Battery-operated models start at $20. Smart detectors with app alerts start at $35.
Paid Partner Product link may earn a commission - see our disclosure.
Remodeling Permit Requirements in Idaho
✓ Limited EnforcementElectrical and plumbing statewide. Structural permits by local jurisdiction — some rural areas exempt.
Fines vary by jurisdiction; electrical violations up to $1,000
Why This Matters
- Unpermitted work can reduce your home's appraised value by 10–20% and complicate or block a sale entirely.
- Homeowner insurance may deny claims for damage caused by or related to unpermitted renovations.
- Buyers' lenders may require proof of permits before approving a mortgage, especially for kitchens, bathrooms, and structural changes.
- Unpermitted electrical and plumbing work is a leading cause of house fires and water damage - permits exist to ensure safety inspections.
- If you are planning remodeling work in Idaho, contact your local building department before starting any project that alters structure, electrical, plumbing, or mechanical systems.
Remodeling Permit Questions for 83321
What remodeling work requires a permit in Idaho?
In Idaho, permits are generally required for any work that alters the structure, electrical wiring, plumbing, or mechanical systems of a home. This includes kitchen and bathroom renovations involving plumbing or electrical changes, wall removal, room additions, window enlargements, re-roofing, and HVAC replacement. Purely cosmetic work - painting, flooring, cabinet refacing without plumbing changes - typically does not require a permit. Always check with your local building department, as municipal requirements may be stricter than state minimums.
What happens if I remodel without a permit in Idaho?
Working without a required permit in Idaho can result in Fines vary by jurisdiction; electrical violations up to $1,000. Beyond legal penalties, unpermitted work creates problems when selling: buyers' home inspectors and appraisers flag unpermitted additions, lenders may refuse financing, and title companies may require permits to be obtained retroactively - often at 2–3 times the original permit fee. In serious cases, you may be required to open walls for inspection or demolish non-compliant work.
How much does a remodeling permit cost in Idaho?
Remodeling permit fees in Idaho typically range from $50 to $1500, depending on the scope and value of the project. Most jurisdictions calculate fees as a percentage of the project's estimated construction cost (usually 1–2%) or use a flat fee schedule based on project type. Electrical and plumbing sub-permits may be billed separately. Contact your local building department for an exact fee quote before starting work.
Permit requirements based on Idaho building codes and ICC adoption data. Costs reflect typical municipal fee schedules and may vary by jurisdiction, project scope, and valuation. This information is for general guidance only - contact your local building department for requirements specific to your project.
Cost & Community (7) HIGH
True Cost of Ownership
How this ZIP compares
Where the estimate comes from
Show all 4 factors
5-year equipment outlook
No major equipment is flagged for likely replacement within five years.
What this means
- This is a modeled estimate of how much more - or less - a household here may spend each year on risk-related costs such as insurance, mitigation, testing, and maintenance, compared with a typical US ZIP.
- It is a comparison figure for context, not a bill, a quote, or financial advice.
- The 5-year equipment ranges above are separate one-time replacements, not part of the annual figure.
Methodology: Each of 13 risk verticals is assigned a dollar figure from public federal data; the total is the modeled annual difference from a median-risk US ZIP. The 5-year equipment outlook flags major home equipment whose estimated age is within five years of its typical service life; figures are national-average installed-cost ranges.
Estimates are modeled from public federal data. They are not quotes, prices, or financial or insurance advice.
Affordability-Adjusted Risk Score
What This Means
In Castleford (83321), the affordability-risk score sits at the manageable end of the scale - the safety gap is real but proportionally contained, within typical household reach for most residents.
- Lower-income communities face disproportionate exposure to environmental hazards
- Federal and state programs may help offset costs - check eligibility below
- This score combines water quality, housing age, and income data from EPA and Census sources
Environmental Justice Context: The EPA recognizes that low-income and minority communities often bear a disproportionate burden of environmental hazards. Use the EPA EJScreen tool to explore environmental justice indicators for your area.
Sources: Census ACS 5-Year B19013 (income), EPA SDWIS (water quality), Census ACS B25034 (housing age). Remediation costs are estimates based on typical residential systems.
Fair market rent in this ZIP
These are HUD's Fair Market Rent figures for this ZIP, the payment-standard monthly rents HUD uses for housing assistance. They are a published benchmark, not a survey of what units actually rent for today.
HUD sets the fair market rent for a 2-bedroom home in this ZIP at $1,290 per month.
Monthly fair market rent by home size:
HUD metro area: Twin Falls County, ID HUD Metro FMR Area.
Source: HUD Small Area Fair Market Rents, FY2025. A SAFMR is a HUD payment-standard figure, not a survey of actual market rents.
Subsidized rental housing in this ZIP
These counts come from HUD's Picture of Subsidized Households, which tracks federally subsidized rental units across all HUD programs. They describe housing assistance reported in this ZIP, not a judgment about the area.
HUD reports 8 federally subsidized rental units in this ZIP.
What HUD reports here:
Source: HUD Picture of Subsidized Households, 2025. HUD suppresses small counts; a suppressed value is treated as not reported, not zero.
Tax Burden in Idaho
State tax rates affect cost of ownership. Here's how Idaho compares to national averages.
Source: Tax Foundation 2024. Income tax = top marginal rate. Sales tax = state + avg local. Property tax = effective rate on home value.
Energy Costs in Idaho
Residential electricity rate: 12.70¢/kWh - 25% below the national average (national avg: 17.0¢/kWh · EIA, December 2025)
Idaho Energy Mix
Source: EIA Form 923, 2025 data. Renewable = solar + wind + hydro + geothermal.
Energy Rebates for 83321
1 rebate available for heat pump water heaters, insulation, and more.
Home Energy Audit for 83321
The Inflation Reduction Act provides up to $8,000 in rebates and $3,200 in annual tax credits for home energy upgrades - but many provisions phase down or expire after 2032. A professional energy audit is the first step to qualifying for these incentives. Homes in 83321 average ~38 years old, making energy audits especially impactful.
What a Home Energy Audit Covers
- Insulation levels in attic, walls, and basement
- Air leaks around windows, doors, and ducts
- Blower door test (measures total air leakage)
- HVAC efficiency and age assessment
- Water heater type and condition
- Lighting and appliance energy use
- Carbon monoxide and combustion safety
- Moisture and ventilation assessment
- Gas leak detection
- Prioritized list of recommended upgrades
- Estimated cost and savings for each upgrade
- Rebate and tax credit eligibility report
- The average home energy audit identifies $200–$400/year in savings (DOE)
- Properly sealed and insulated homes save 15% on heating and cooling costs (DOE)
- Heat pump upgrades can reduce heating costs by 30–50% compared to electric resistance
- ENERGY STAR certified windows save $101–$583/year compared to single-pane windows
- Weatherization assistance programs are available for income-qualifying households
Homes in 83321 are ~38 years old on average - older homes typically have the most to gain from an energy audit due to outdated insulation, single-pane windows, and aging HVAC systems.
Under the Inflation Reduction Act. Income limits apply for HEEHRA rebates. Tax credits require tax liability. IRS details →
To claim the $150 federal tax credit, your energy audit must meet DOE standards (10 CFR 440.21) and be performed by a qualified auditor. A DOE-compliant audit includes:
- Blower door test to measure air infiltration
- Infrared thermography to identify insulation gaps
- Combustion safety testing for gas appliances
- Written report with prioritized, cost-effective upgrade recommendations
Energy Audit Questions for 83321
How much does a home energy audit cost?
A professional home energy audit typically costs $150–$400 depending on the size of your home and the depth of testing. The Inflation Reduction Act provides a $150 tax credit for qualifying audits performed by a certified auditor, effectively covering a significant portion of the audit cost. Some utilities also subsidize audits for their customers.
What is the difference between an energy audit and a home inspection?
A home inspection (done during a home sale) evaluates structural and safety conditions. An energy audit specifically measures how your home uses energy and identifies efficiency improvements. Energy audits use specialized tools like blower doors, infrared cameras, and duct blasters that are not part of a standard home inspection. The audit produces a prioritized list of upgrades with estimated costs and savings.
How much can I save after an energy audit?
According to the U.S. Department of Energy, the average audit identifies $200–$400/year in savings. Actual savings depend on your home's age, current insulation, HVAC efficiency, and local energy rates. At current rates in Idaho, the average home spends approximately $1,334/year on electricity - a 15–25% reduction through audit-recommended upgrades could save $200–$334 annually. With homes in 83321 averaging ~38 years old, there is likely significant potential for improvement.
What rebates and tax credits are available for energy upgrades?
The Inflation Reduction Act (IRA) provides two types of incentives: (1) Tax credits up to $3,200/year for heat pumps ($2,000), insulation ($1,600), windows ($600), and the audit itself ($150); and (2) HEEHRA rebates for income-qualifying households - up to $8,000 for heat pumps, $1,600 for insulation, $2,500 for electrical panels, and $840 for heat pump dryers. Solar panels qualify for a separate 30% tax credit through 2032.
Do I need an energy audit before installing solar panels?
An energy audit is not legally required before installing solar, but the DOE strongly recommends it. Reducing your home's energy consumption before adding solar means you need a smaller (cheaper) system to cover your needs. An audit typically identifies 15–30% in energy reductions through insulation, air sealing, and HVAC improvements - which directly reduces the size and cost of a solar installation.
How long does a home energy audit take?
A comprehensive energy audit takes 2–4 hours for a typical single-family home. The auditor will inspect the attic, basement, walls, windows, HVAC system, water heater, and ductwork. Diagnostic tests (blower door, infrared scan) add precision to the findings. You will receive a written report within 1–2 weeks with prioritized recommendations and estimated costs.
Source: U.S. Energy Information Administration (EIA), U.S. Department of Energy (DOE), Inflation Reduction Act of 2022 (P.L. 117-169).
Recent Product Recalls
Recent CPSC recalls for plumbing and HVAC products that may affect homes in your area.
Madewell Double V-Neck Pullover and V-Neck Cardigan Sweaters
Topyond Pool Drain Port with Cover
XW-A17 Electric Youth All-Terrain Vehicles (ATVs)
Protect Your Home in Castleford
Based on local data for ZIP 83321, these services may benefit homeowners in your area.
Based on local data for your area. Use the tools below to explore your options.
Gutter Installation & Repair
Homes in 83321 were built around 1988 on average. Aging gutters can cause foundation damage, basement flooding, and mold - a professional assessment can prevent costly repairs.
Typical cost: Gutter installation: typically $1,000–$2,500 for a standard home
Estimate Your Home Maintenance CostsService recommendations are based on public data for this ZIP code (FEMA, Census ACS, NWS). Actual needs vary by property. By calling, your information will be shared with an independent service provider. ZipCheckup may receive compensation. Cost estimates are approximate and vary by property, condition, and contractor.
SNAP food retailers in this ZIP
These are stores located in this ZIP that are currently authorized to accept SNAP (food stamp) benefits. The count reflects where stores are located, not how easy groceries are to reach; a resident may shop in a nearby ZIP.
1 SNAP-authorized food retailer is located in this ZIP.
Store types located here:
No grocery or supermarket store is located in this ZIP; only convenience or specialty stores are. Residents may buy groceries in a nearby ZIP.
Source: USDA FNS Historical SNAP Retailer Locator (active authorizations), December 2025. A store is counted where it is located; this is not a measure of grocery access.
Frequently Asked Questions
Is the tap water in 83321 safe to drink?
No EPA-registered public water system is mapped to ZIP 83321, so there is no federal water quality record to assess. Residents in this area typically rely on private wells or very small systems below EPA reporting thresholds. If you rely on a private well, the CDC recommends testing it at least once a year. ZipCheckup last updated this page in July 2026. The federal source release date is unavailable, so that month is not presented as source currency.
Where does 83321's water come from?
There is no community water system directly registered with the EPA for ZIP 83321. Most residents rely on private wells drawing from groundwater, or are served by a neighboring district that isn't cross-referenced to this ZIP in federal data. Check with your local county health department to confirm your source.
How does Castleford water compare to the national average?
Castleford's water quality ranks better than 76% of U.S. ZIP codes, and better than 83% within Idaho.
How can I get my water tested in Castleford?
Since no EPA-registered water utility is mapped to ZIP 83321, contact your local county health department or hire a certified lab for independent home water testing. The EPA recommends testing private wells at least once a year.
What is the radon risk for 83321?
83321 falls in EPA Radon Zone 2 (Moderate risk), located in Twin Falls County. Zone 1 indicates the highest radon potential. Testing your home is recommended regardless of zone.
How to cite this page
ZipCheckup. (2026). Castleford, ID (83321): No EPA Water System. https://zipcheckup.com/report/83321/
@misc{zipcheckup-report-83321,
author = {{ZipCheckup}},
title = {{Castleford, ID (83321): No EPA Water System}},
year = {2026},
url = {https://zipcheckup.com/report/83321/}
}
Page version: August 2026.
Nearby ZIP Code Reports
Water quality comparison for ZIP codes near 83321
| ZIP Code | City, State | Distance | Grade | Violations |
|---|---|---|---|---|
| 83316 | Buhl, ID | 7.2 mi | B | 22 |
| 83328 | Filer, ID | 13.6 mi | N/A | 16 |
| 83355 | Wendell, ID | 18.2 mi | N/A | 0 |
| 83332 | Hagerman, ID | 20.3 mi | N/A | 0 |
| 83301 | Twin Falls, ID | 20.7 mi | B | 19 |
| 83303 | Twin Falls, ID | 21.2 mi | N/A | 0 |
| 83338 | Jerome, ID | 23.3 mi | N/A | 63 |
| 83302 | Rogerson, ID | 25.3 mi | N/A | 0 |
| 83341 | Kimberly, ID | 25.9 mi | N/A | 3 |
| 83334 | Hansen, ID | 29.2 mi | N/A | 0 |
Nearby ZIP Code Reports
2026 Rankings for Your Area
Overall safety breakdown
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Community resilience for this ZIP area
This is a ZIP-area measure from the CDC Social Vulnerability Index, which estimates how well a community can prepare for and recover from disasters and other hazards. A higher percentile points to a community that may need more outside support; it is not a hazard or a verdict about any single address.
The CDC ranks this ZIP area in the 76th percentile for social vulnerability nationally, in the high range.
Based on a ZIP-area population of about 496.
What drives the score (national percentile by theme):
Source: CDC/ATSDR Social Vulnerability Index 2022 (ZCTA), built from 2018-2022 American Community Survey estimates. Percentiles compare this ZIP area with all others nationally.