Hayward, CA (94557) Water Safety: 83/100 (2026)
EPA data for City of Hayward
By every federal metric, 94557 in Hayward, CA posts clean drinking water compliance — nothing logged.
Data source: U.S. Environmental Protection Agency (EPA) SDWIS Last verified: April 2, 2026
At a Glance
- Water No EPA violations on record for the past 5 years.
- Lead Lead reading of 0.002 mg/L is well below EPA action level.
- Radon EPA Zone 2 — moderate predicted indoor radon (2–4 pCi/L).
Composite Home Safety Score has been stable over the tracking period.
What’s Happening in Hayward, California
No significant water quality or safety concerns have been reported for this area. The safety score is stable.
Recommended Buyer Guides for This ZIP
Independent guides — grounded in EPA, NSF, FEMA, and CDC standards. Matched to risks detected in your area.
- Best Water Testing Kits — Baseline water quality check
- Best Under-Sink Reverse Osmosis Systems — Multi-contaminant peace of mind
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 Hayward Compares
Safety Score vs. Alameda County and California averages
| Metric | Hayward | Alameda County | California |
|---|---|---|---|
| Safety Score | 83 | 69 | 73 |
| EPA Violations (total) | 0 | 1.3 | 2.8 |
| Lead (ppb) | 1.6 | 13.4 | 6.1 |
County and state averages computed from 41,344 ZIP codes. Data: EPA SDWIS.
See incorrect data? Let us know
🔍Key Insights for Hayward 94557
Derived from EPA, Census, FEMA, and EIA data — exclusive to ZipCheckup
Score Breakdown
How your Home Safety Score of 83 is calculated.
Score has been stable — no change in the last 90 days.
Safety & Health (10) HIGH
Compliance Alerts for 94557
1 issue 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.
Service Disruption Risk
Moderate15% estimated probability of a boil water advisory or service interruption in the next 90 days.
Based on infrastructure age, EPA violation history, flood exposure, and seasonal patterns.
Estimates based on EPA enforcement data, U.S. Census ACS housing vintage, and FEMA flood claims. Not a guarantee of disruption.
Your Water System
ZIP code 94557 in Hayward, California is served by City of Hayward (EPA ID: CA0110006). This system provides water to approximately 162,954 people from surface water sources.
There are 2 community water systems serving this area.
Home Safety Score: B (83/100)
Based on water quality violations, lead levels, and radon risk in your area. This score is better than 82% of ZIP codes nationally and 74% in California.
| Factor | Status | Details |
|---|---|---|
| Water Quality | good | 0 violations, 0 health-based |
| Lead in Water | safe | 0.0016 mg/L (EPA action level: 0.015 mg/L) |
| Radon Risk | Moderate | Zone 2 |
| Gas Safety | low | 11 incidents, score 16/100 |
| Wildfire Smoke | moderate | score 26/100, 2 county fires (5yr) |
| Earthquake Risk | Relatively High | score 40.8/50 |
| Superfund NPL | Moderate | nearest 11.9 mi (Lawrence Livermore Laboratory (USDOE)), 0 sites within 10 km |
Lead & Copper in Your Water
The EPA requires water systems to monitor lead and copper levels under the Lead and Copper Rule.
| Metal | Measured Level | EPA Action Level | Status | Sample Date |
|---|---|---|---|---|
| Lead | 0.0016 mg/L | 0.015 mg/L | Within limit | N/A |
Radon Risk
Radon Zone 2 — Moderate potential (Alameda County)
EPA recommends homes consider radon testing. Zone 2 indicates moderate radon potential (predicted average indoor radon screening level between 2 and 4 pCi/L).
CO & Gas Safety
Gas Distribution Risk: Low (score: 16/100)
11 gas distribution incidents recorded in this county since 2004, including 1 fatalities. Most recent: 2025.
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: 26/100)
2 wildfires recorded in this county over the past 5 years. Nearest recent wildfire: 66 km (41 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: Relatively High (score: 40.8/50)
| Metric | Value |
|---|---|
| Risk Score | 40.8 |
| Risk Rating | Relatively High |
| Annual Frequency | 0.0097 damaging events/yr |
| Expected Annual Loss | $380.0M (Very High) |
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: Moderate (score: 28/100)
Nearest NPL site: Lawrence Livermore Laboratory (USDOE) at 11.9 miles (19.1 km).
| Radius | NPL Sites |
|---|---|
| Within 5 km (3.1 mi) | 0 |
| Within 10 km (6.2 mi) | 0 |
| Within 25 km (15.5 mi) | 1 |
Nearest NPL Sites
- Lawrence Livermore Laboratory (USDOE) — 11.9 mi (Construction Complete), listed 07/22/1987
- South Bay Asbestos Area — 17.6 mi (Construction Complete), listed 06/10/1986
- Lawrence Livermore National Laboratory (Site 300) (USDOE) — 19 mi (Active Cleanup), listed 08/30/1990
- Moffett Naval Air Station — 19.9 mi (Active Cleanup), listed 07/22/1987
- CTS Printex, Inc. — 20.4 mi (Construction Complete), listed 02/21/1990
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 CA
Residential electricity rate: 30.29¢/kWh — 78% above the national average (17.0¢/kWh).
High electricity rates in California make energy-efficient appliances and heat pumps particularly valuable for reducing utility bills.
Energy Sources
California generates 53.6% of its electricity from renewable sources — 27% above the national average of 26.9%. Including nuclear, 62.2% of the state's power is carbon-free (EIA 2025).
| Source | Share |
|---|---|
| Natural gas | 35.6% |
| Solar | 27% |
| Hydroelectric | 13.5% |
| Nuclear | 8.5% |
| Wind | 7.9% |
| Geothermal | 5.2% |
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.
Water Systems Serving This Area
| System Name | EPA ID | Population | Source |
|---|---|---|---|
| City of Hayward | CA0110006 | 162,954 | Surface water |
| Camphora Apartments | CA2701046 | 126 | Groundwater |
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 California
- 90001 (Los Angeles) — 2 violations
- 90002 (Los Angeles) — 2 violations
- 90003 (Los Angeles) — 2 violations
- 90004 (Los Angeles) — 2 violations
- 90005 (Los Angeles) — 2 violations
- 90006 (Los Angeles) — 2 violations
- 90007 (Los Angeles) — 2 violations
- 90008 (Los Angeles) — 2 violations
- 90009 (Los Angeles) — 2 violations
- 90010 (Los Angeles) — 2 violations
- 90011 (Los Angeles) — 2 violations
- 90012 (Los Angeles) — 2 violations
- 90013 (Los Angeles) — 2 violations
- 90014 (Los Angeles) — 2 violations
- 90015 (Los Angeles) — 2 violations
- 90016 (Los Angeles) — 2 violations
- 90017 (Los Angeles) — 2 violations
- 90018 (Los Angeles) — 2 violations
- 90019 (Los Angeles) — 2 violations
- 90020 (Los Angeles) — 2 violations
Nearby Water Quality Reports
- 94537 (Fremont) — <1 mi — 8 violations
- 94540 (Hayward) — <1 mi
- 94588 (Pleasanton) — 1 mi — 2 violations
- 94568 (Dublin) — 3 mi
- 94566 (Pleasanton) — 3 mi — 2 violations
- 94586 (Sunol) — 5 mi
- 94583 (San Ramon) — 6 mi — 16 violations
- 94582 (San Ramon) — 6 mi — 16 violations
- 94552 (Castro Valley) — 7 mi — 2 violations
- 94570 (Moraga) — 7 mi — 18 violations
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View the full compliance record for City of Hayward (CA0110006) on EPA.gov.
Frequently Asked Questions
Is the tap water in 94557 safe to drink?
Based on EPA records, the water system serving ZIP code 94557 has no recorded violations in the past 5 years. However, individual home conditions (old pipes, well water) can affect quality.
Where does 94557's water come from?
The primary water source for this area is surface water. City of Hayward serves approximately 162,954 people.
How can I get my water tested?
Contact your local water utility for a free water quality report, or hire a certified lab for independent home water testing. The EPA recommends testing annually if you use a private well.
Does 94557 have lead in the water?
Lead and Copper Rule sampling data for ZIP code 94557 shows a lead level of 0.0016 mg/L, which is below the EPA action level of 0.015 mg/L. Still, older homes with lead service lines or pre-1986 plumbing may have higher levels at individual taps.
What is the radon risk in 94557?
ZIP code 94557 (Alameda 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 3 of the top compounds applied across the surrounding county are flagged by the EPA for drinking-water monitoring — see the agricultural pesticide-use section
California Water Quality Overview
California enforces some of the strictest drinking water standards in the nation, including limits on chromium-6 and 1,2,3-TCP that have no federal equivalent. The state enforces stricter limits than federal EPA minimums for 6 contaminants. 24 water systems in our data exceed these state-level limits while still passing federal standards. ZipCheckup analyzes lab results from 5,320 water systems across California, covering 27 contaminants from 5 data sources. The most frequently tested contaminants include Lead (Pb 90th %ile), NEtFOSAA, NMeFOSAA. Overall, California earns a water quality grade of B (average score: 73/100) across 2,630 ZIP codes. 55% of tested systems have at least one EPA violation on record. If you live in California, review the contaminant table above for your specific water system — state averages may not reflect local conditions.
Score History
Tracking since 2026-03-18 · 54 data points
Safety Score Timeline
Consumer Confidence Report
2022 ReportAnnual water quality report published by Hayward for ZIP code 94557.
Key Contaminants
| Contaminant | Level | MCL | Status |
|---|---|---|---|
| Turbidity - Unfiltered Hetch Hetchy Water | 3.4 NTU | 5 NTU | Within Limit |
| Turbidity - Filtered Water from Sunol Valley Water Treatment Plant (SVWTP) | 2.2 NTU | 1 NTU | Within Limit |
| Total Trihalomethanes | 46 ppb | 80 ppb | Within Limit |
| Five Haloacetic Acids | 31.9 ppb | 60 ppb | Within Limit |
| Chloramine (as chlorine) | 3 ppm | 4 ppm | Within Limit |
Lead & Copper Rule Results
What Is a Consumer Confidence Report?
Every community water system in the U.S. is required by the EPA to publish an annual Consumer Confidence Report (CCR), also known as a Water Quality Report. It lists all detected contaminants, their levels compared to federal limits (MCLs), and information about where your water comes from.
How to Read Your CCR
- MCL (Maximum Contaminant Level) — the highest level of a contaminant allowed in drinking water
- MCLG (Maximum Contaminant Level Goal) — the level below which there is no known health risk
- Action Level — used for lead and copper; triggers treatment if exceeded at the 90th percentile
- A violation means detected levels exceeded the MCL — your utility must notify you and take corrective action
Based on your water data
Removes chlorine taste and disinfection byproducts. Addresses HAA5 (disinfection byproducts) and THMs (disinfection byproducts) detected in your water.
View details →Filters every tap in your home. View details →
Product links are affiliate links — we may earn a commission at no extra cost to you. Recommendations are based on NSF certifications and EPA contaminant data, not advertiser influence. See our disclosure.
Recommended Water Filters
Moderate PriorityBased on 3 contaminants.
Total Trihalomethanes detected at 46 ppb
Five Haloacetic Acids detected at 31.9 ppb
Chloramine (as chlorine) detected at 3 ppm
Get a detailed filter match based on your ZIP code's water data
Find the Right Filter for Your Water →Recommendations are based on contaminants detected in the most recent Consumer Confidence Report. Individual results may vary. Look for filters with the certifications listed above. Product mentions are not endorsements.
Childhood Environmental Risk Score — 94557
Moderate RiskThis ZIP's score is higher than 33% of U.S. ZIP codes and 44% of those in California — a relative ranking, not a verdict on any home.
Risk Factor Breakdown
Water lead is the largest contributor to this ZIP's score. Lead can enter tap water from older service lines and fixtures, and children under 6 absorb it more readily than adults. The CDC has found an association between lead exposure and developmental delays, so testing the water a child drinks is a practical first step.
- 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 94557? A free 30-second ZIP check shows them the same lead, water, and housing data.
Lead Pipe Replacement Funding for California
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 California
2 active weather alerts in California. Severe weather can affect your water quality and home safety.
Environmental Hazards (8) MODERATE
Air Quality for 94557
Air quality is satisfactory, and air pollution poses little or no risk. Enjoy outdoor activities.
Termite Risk for 94557
Very Heavy Termite ZoneRequired for VA/FHA loans statewide; Section 1/Section 2 pest report standard in conventional sales. Sellers must disclose known termite activity
VA/FHA loan will not close without clear NPMA-33 form; Section 1 findings may require treatment before close of escrow
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.
- California falls in a very heavy termite infestation probability (TIP) zone. Subterranean termites are the primary concern, with Formosan subterranean termites also present in this region.
Source: USDA Forest Service Termite Infestation Probability (TIP) zones, VA/FHA lender requirements, California 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 94557
High Pest Pressuretermites, rodents, cockroaches, bed bugs and mosquitoes
- West Nile activity zone
Required for VA loans in all states; Section 1/Section 2 pest report standard in conventional sales
Up to $5,000 per violation; criminal penalties for willful violations
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.
- California's climate creates year-round pest pressure. Regular professional inspections and preventive treatment are strongly recommended.
Common Questions
Source: CDC vector-borne disease surveillance, EPA pesticide regulation data, California 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.
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.
Product links may earn a commission — see our disclosure.
Mold Risk Assessment for 94557
Very Low RiskWinter humidity (67%) remains elevated in this area. Condensation on cold surfaces creates mold-favorable conditions even in cooler months. Summer humidity averages 47%.
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.
With 57% average humidity, a dehumidifier is the most effective way to reduce mold risk in 94557. Energy Star-rated units cost $200–$400 and can reduce humidity by 20–30%.
Respiratory Risk Today
Low RiskSuperfund Sites & Soil Contamination Risk
Nearest Superfund (NPL) Sites
| Site Name | Distance | Status | Listed |
|---|---|---|---|
|
Lawrence Livermore Laboratory (USDOE)
Livermore, California
|
11.9 mi | Construction Complete | 07/22/1987 |
|
South Bay Asbestos Area
Alviso, California
|
17.6 mi | Construction Complete | 06/10/1986 |
|
Lawrence Livermore National Laboratory (Site 300) (USDOE)
Livermore, California
|
19 mi | Active Cleanup | 08/30/1990 |
|
Moffett Naval Air Station
Sunnyvale, California
|
19.9 mi | Active Cleanup | 07/22/1987 |
|
CTS Printex, Inc.
Mountain View, California
|
20.4 mi | Construction Complete | 02/21/1990 |
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.
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 · 1.4k kg/yr · EPA drinking-water reference limit: 700 ppb
-
Moderate water concern2,4-DHerbicide · 173 kg/yr · EPA drinking-water reference limit: 70 ppb
-
Low water concernPENDIMETHALINHerbicide · 173 kg/yr
-
Moderate water concernIMIDACLOPRIDInsecticide · 128 kg/yr
-
Low water concernPARAQUATHerbicide · 16 kg/yr
3 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 (3) OK
Home Buyer Risk Report
An inspection-grade snapshot of public-data risk factors for this ZIP, built to help a buyer decide what to verify before closing.
Public federal data shows few elevated risk factors for this ZIP. A standard home inspection before closing is still an important step.
Seven-factor inspection checklist
Each factor below is scored 0–100 from public federal data. A higher score means the factor is more worth verifying before you buy.
The local water system's recent EPA violation and contaminant history, along with an independent tap-water test, gives more context.
The FEMA flood zone, whether the property has flooded before, and flood-insurance requirements are key points to review.
The EPA recommends testing every home for radon; homes in EPA Radon Zone 1 have the highest potential.
Local air-quality history is useful context; for sensitive occupants, an HVAC system with good filtration helps.
Nearby hazards
No EPA Superfund (National Priorities List) sites recorded within 10 km.
ATSDR public-health assessment for nearby sites: No Apparent Public Health Hazard.
Modeled probability of a local water-service disruption in the next 90 days.
See the 90-day disruption outlookHealthcare access
Hospitals reported by CMS Hospital Compare near this ZIP code, with overall federal quality star ratings where CMS publishes one.
Closest hospitals
-
CMS 5-star ratingStanford Health Care Tri-ValleyAcute care · 1.5 mi away · ER
-
CMS 4-star ratingSan Ramon Regional Medical CenterAcute care · 5.5 mi away · ER
-
CMS 4-star ratingEden Medical CenterAcute care · 8.7 mi away · ER
Across the rated hospitals within 15 miles, the average CMS overall-quality rating is 3.1 (CMS scale: 1 to 5).
Federal data from CMS Hospital Compare. Distances are straight-line estimates from the ZIP code centroid; ZipCheckup neither ranks nor recommends any hospital.
Inspection-day checklist
Practical items to raise with your inspector, agent, or the seller — tailored to this ZIP's data.
- Hire an independent home inspector for a full walkthrough of the property.
- Read the seller's disclosure and any past inspection or repair records.
- Ask for service records for the HVAC system, water heater, and roof.
What this means
- This report consolidates seven home-purchase risk factors and nearby hazards from public federal data into one place.
- Each flagged item is a recommendation to verify independently — not a finding of a defect.
- An independent home inspection remains an essential step before closing.
Methodology: The report combines the home purchase risk score — a seven-factor composite of public federal data — with EPA Superfund, ATSDR, water-disruption, and NRC nuclear-zone proximity datasets. All figures are modeled estimates.
Informational only. This is a modeled summary of public federal data, not a home inspection, an appraisal, or a prediction of defects. Verify any concern with a qualified inspector before a purchase.
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.
Product link may earn a commission — see our disclosure.
Remodeling Permit Requirements in California
⚠ Strict Permit EnforcementStructural, electrical, plumbing, mechanical, HVAC, water heater, re-roofing, window replacement. Cosmetic-only work exempt.
Fines up to $5,000 for first offense, retroactive permit at 2–10x normal fee, mandatory correction
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 California, contact your local building department before starting any project that alters structure, electrical, plumbing, or mechanical systems.
Remodeling Permit Questions for 94557
What remodeling work requires a permit in California?
In California, 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 California?
Working without a required permit in California can result in Fines up to $5,000 for first offense, retroactive permit at 2–10x normal fee, mandatory correction. 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 California?
Remodeling permit fees in California typically range from $200 to $5000, 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 California 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 (5) OK
True Cost of Ownership
How this ZIP compares
Where the estimate comes from
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.
Tax Burden in California
State tax rates affect cost of ownership. Here's how California compares to national averages.
Highest top marginal income tax rate in the nation
Source: Tax Foundation 2024. Income tax = top marginal rate. Sales tax = state + avg local. Property tax = effective rate on home value.
Energy Costs in California
Residential electricity rate: 30.29¢/kWh — 78% above the national average (national avg: 17.0¢/kWh · EIA, December 2025)
California Energy Mix
Source: EIA Form 923, 2025 data. Renewable = solar + wind + hydro + geothermal.
Electric Utility for 94557
Source: U.S. Energy Information Administration, Form EIA-861 (2024 data). EIA ID: 14328.
Home Energy Audit for 94557
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.
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
Pacific Gas & Electric Co. (Investor-owned) serves 94557. Your local residential rate is 39.6¢/kWh , which is above the national average — making energy efficiency improvements even more valuable . Many utilities offer additional rebates on top of federal IRA incentives — ask your energy auditor about programs from Pacific Gas & Electric Co..
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 94557
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 — check with Pacific Gas & Electric Co. for local programs.
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 California, the average home spends approximately $3,180/year on electricity — a 15–25% reduction through audit-recommended upgrades could save $477–$795 annually.
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.
Superbobi 7 3/8 Inch Pool Drain Covers
Shenzhen Jiangtou Technology Co. · 2026-05-14
Electric Kettles (ENFINIGY 1.5 l and ENFINIGY Pro 1.5 l)
ZWILLING J. A. Henckels Aktiengesellschaft · 2026-05-14
Electric Start Pressure Washers
Generac Power Systems Expands · 2026-05-14
1-K Kerosene Heater Fluid Portable Fuel Containers
Alliance Chemical · 2026-04-30
Protect Your Home in Hayward
Based on local data for ZIP 94557, these services may benefit homeowners in your area.
Based on local data for your area. Use the tools below to explore your options.
Roofing Inspection & Repair
Active weather alerts in California increase the risk of roof damage from hail and high winds. A professional inspection can identify vulnerabilities.
Typical cost: Roof inspection: typically $75–$300; repairs $300–$1,500
Estimate Your Home Insurance NeedsService 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.
Frequently Asked Questions
Is the tap water in 94557 safe to drink?
Based on EPA SDWIS data, Hayward's primary water system (City of Hayward) has 0 recorded violations in the past 5 years, including 0 health-based. Check the full report above for details.
Where does 94557's water come from?
The primary water source for ZIP code 94557 is Surface water. City of Hayward serves approximately 162,954 people.
How can I get my water tested in Hayward?
Contact your local water utility (City of Hayward) for a free Consumer Confidence Report, or hire a certified lab for independent home water testing. The EPA recommends annual testing if you use a private well.
Is lead a concern in 94557 tap water?
The most recent lead sampling for 94557 recorded 0.0016 mg/L. The EPA action level is 0.015 mg/L. This result is below the EPA action level.
What is the radon risk for 94557?
94557 falls in EPA Radon Zone 2 (Moderate risk), located in Alameda County. Zone 1 indicates the highest radon potential. Testing your home is recommended regardless of zone.
What contaminants were found in ZIP 94557 water?
According to the most recent Consumer Confidence Report, 24 contaminants were detected. The top contaminants include Turbidity - Unfiltered Hetch Hetchy Water (3.4 NTU), Turbidity - Filtered Water from Sunol Valley Water Treatment Plant (SVWTP) (2.2 NTU), Total Trihalomethanes (46 ppb). See the full water quality breakdown above.
Nearby ZIP Code Reports
Water quality comparison for ZIP codes near 94557
| ZIP Code | City, State | Distance | Grade | Violations |
|---|---|---|---|---|
| 94537 | Fremont, CA | <1 mi | B | 8 |
| 94540 | Hayward, CA | <1 mi | B | 0 |
| 94588 | Pleasanton, CA | 1.5 mi | B | 2 |
| 94568 | Dublin, CA | 2.5 mi | B | 0 |
| 94566 | Pleasanton, CA | 2.7 mi | B | 2 |
| 94586 | Sunol, CA | 5.1 mi | C | 0 |
| 94583 | San Ramon, CA | 5.5 mi | D | 16 |
| 94582 | San Ramon, CA | 5.8 mi | D | 16 |
| 94552 | Castro Valley, CA | 6.8 mi | B | 2 |
| 94570 | Moraga, CA | 7.0 mi | D | 18 |
Nearby ZIP Code Reports
2026 Rankings for Your Area
Overall safety breakdown
Home Safety Score →Find the right water filter
Water Filter Matcher →Compare filters, tests & services
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