ZipCheckup grade for 80118: D.

Federal records show several conditions worth reviewing.

Your top priority: test this home for radon. Check your ZIP → EPA radon map

Health Violations Found
D 50

Larkspur, CO (80118): 4 Health-Based Violations Recorded for Mapped Water Systems - 50/100

EPA data combined for 4 water systems mapped to this ZIP (largest mapped system: Perry Park Water Supply District)

Health Violations Found PFAS Detected High County Radon Potential

Health-based violation records by water system:

EPA records for the water systems mapped to 80118 in Larkspur, CO contain 47 recorded violations for inclusive record years 2021 through 2026, all mapped systems combined; 4 are marked health-based.

Data source: U.S. Environmental Protection Agency (EPA) SDWIS

Based on EPA Drinking Water FEMA Flood Data U.S. Census CDC Energy Information Admin. USGS Water Data & 9 more federal sources
Latest air quality, EPA records and weather alerts Current data temporarily unavailable
Current EPA violation data unavailable
Water records and current conditions
Current EPA violation data unavailable
Safety Score
D 50/100
Water Quality Issues 4 health-based violation records
Lead Risk Below action level 0.001 mg/L, 90th percentile, sample period ending 2025-12-31
NFIP Claim History Claim records 1 claim
Data confidence: High (direct measurement) Medium (sampled / sub-geography) Low (modeled / inferred) Methodology →

At a Glance

  • Water EPA records for water systems mapped to this ZIP show 4 health-based violations and 43 non-health-based (since 2021).
  • Lead The reported 90th-percentile lead result of 0.001 mg/L is below the EPA action level for water systems; EPA's health goal for lead is zero.
  • PFAS PFAS detected in UCMR5 sampling; see the PFAS section for each compound, compared with the federal PFAS MCL where one exists.
  • Radon EPA Zone 1 - highest county-level potential. This is not a home measurement; test before any threshold comparison.
  • Flood 1 cumulative NFIP claim record. Claim evidence is historical, not current map coverage.
Contaminant Summary
Health Violations
47 violations 4 health-based PFAS detected
Report data assembled: Jul 27, 2026 EPA water-system identity: source date or period is not present in ZipCheckup's accepted source record EPA violation history: more than two update cycles old Lead, copper and UCMR measurements: source date or period is not present in ZipCheckup's accepted source record
D
ZIP-level Home Safety model score: 50 / 100
Bottom 7% of U.S. ZIP codes
4
Water Systems
3,890
People Served
4
Health Violations (since 2021)Median is 0
Surface water
Water Source
0.001 mg/L
Reported Lead ResultBelow the national median of system results
Zone 1
County Radon Potential · High
$827K
Median Home Value92% above state median ($430K)

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Score Breakdown

Overall Home Safety Score: 50/100

This is the published model score. Component and domain values are shown independently; they are not added together on this page.

Canonical components

EPA water compliance
0/100
Observed
PFAS MCL screen
100/100
Observed
EPA radon zone
0/100
Observed
Annual EPA AirData AQI
100/100
Observed

Required domains

Drinking water
50/100
Indoor environment
0/100
Outdoor environment
100/100

Coverage: 4 of 4 components and 3 of 3 domains observed.

Model 4.0.0; series home-safety-v4-cross-vertical.

Safety & Health (7) CRITICAL

Your Water System

ZIP code 80118 in Larkspur, Colorado is mapped to the water system Perry Park Water Supply District (EPA ID: CO0118045). This system provides water to approximately 3,890 people from surface water sources.

There are 4 community water systems serving this area.

Water Systems Serving This Area

System Name EPA ID Population Source
Perry Park Water Supply District CO0118045 3,890 Surface water
Castle Rock Town of CO0118010 110,298 Surface water
Larkspur Town of CO0118030 275 Groundwater
Consolidated Bell Mtn Ranch Md CO0118002 1,162 Groundwater

Other Water Quality Reports in Colorado

Nearby Water Quality Reports

Data Sources

This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View available EPA compliance records for Perry Park Water Supply District (CO0118045) on EPA.gov.

5 of the top compounds applied across the surrounding county in USGS pesticide-use estimates appear on EPA drinking-water monitoring lists. See the agricultural pesticide-use section.

📊 EPA Safe Drinking Water · View source →

PFAS Contamination Detected

PFAS ("forever chemicals") have been reported in samples from water systems associated with ZIP code 80118.

Detected compounds: PFBA, PFPeA.

Highest measured level: 0.0051 µg/L

Reverse osmosis (RO) and activated carbon block filters can reduce PFAS at the tap. Certifications list the compounds covered: an NSF/ANSI 53 or 58 claim for PFOA/PFOS does not cover every PFAS, so check that the product lists the compounds detected here.

📊 EPA UCMR5 · View source →
Environmental Hazards (11) MODERATE
Home & Infrastructure (6) OK
Cost & Community (8) HIGH

CPSC product recall notices

These national notices are not matched to this ZIP code or water system.

View all recalls →

📊 CPSC · View source →

Protect Your Home in Larkspur

Based on local data for ZIP 80118, these services may benefit homeowners in your area.

Based on local data for your area. Use the tools below to explore your options.

Home & Flood Insurance

The ZIP code for this report in Larkspur has 1 FEMA flood claim on record. Standard homeowner policies don't cover flood damage - make sure you're protected.

Typical cost: Flood insurance: premiums vary by property and flood zone; request a quote

Check Your Flood Zone (Free)

FEMA flood map lookup - see if your property is in a flood zone

Free tip: Check your FEMA flood zone at msc.fema.gov (free lookup)

Roofing Inspection & Repair

Active weather alerts in Colorado 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 Needs

Service 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 80118 safe to drink?

EPA SDWIS records 47 violations since 2021 across the water systems mapped to ZIP 80118 (primary system: Perry Park Water Supply District), including 4 health-based. The violation table above shows which system each record belongs to. 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 80118's water come from?

The recorded water source for Perry Park Water Supply District, a system mapped to ZIP code 80118, is Surface water. This system serves approximately 3,890 people.

How does Larkspur water compare to the national average?

Larkspur's Home Safety Score ranks lower than 93% of U.S. ZIP codes, and lower than 83% of ZIP codes within Colorado.

How can I get my water tested in Larkspur?

If Perry Park Water Supply District supplies your home, contact it for its Consumer Confidence Report; otherwise contact the water utility that serves your address, 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 80118 tap water?

The Lead and Copper Rule record selected for 80118 reports a 90th-percentile lead result of 0.001 mg/L for a water system mapped to this ZIP (record date 2025-12-31). The EPA action level is 0.015 mg/L. This result is below the EPA action level; it does not show the lead level in each home.

What is the radon risk for 80118?

80118 is mapped to a county in EPA Radon Zone 1 (high county-level radon potential; EPA recommends testing every home), located in Douglas County. EPA radon zones range from Zone 1 (highest county-level potential) to Zone 3 (lowest). Testing your home is recommended regardless of zone.

Are there PFAS (forever chemicals) in 80118's water?

Yes, PFAS have been detected in samples from water systems mapped to 80118. Reverse osmosis and activated carbon filters certified to NSF/ANSI 53 or 58 specifically for PFOA/PFOS reduction can reduce PFAS.

What does the NFIP claim history show for ZIP 80118?

FEMA records contain 1 flood insurance claim filed in ZIP code 80118; the recorded rated-zone value (the most frequent one if there are several claims) is X, which is claims evidence and may differ from the current FEMA map zone for a property. Claim records do not establish current property risk. Review FEMA's map for the specific property.

How to cite this page

APA ZipCheckup. (2026). Larkspur, CO (80118): 4 Health-Based Violations Recorded for Mapped Water Systems - 50/100. https://zipcheckup.com/report/80118/
BibTeX 
@misc{zipcheckup-report-80118,
  author = {{ZipCheckup}},
  title  = {{Larkspur, CO (80118): 4 Health-Based Violations Recorded for Mapped Water Systems - 50/100}},
  year   = {2026},
  url    = {https://zipcheckup.com/report/80118/}
}

Page version: October 2026.

Nearby ZIP Code Reports

Water quality comparison for ZIP codes near 80118

ZIP Code City, State Distance Grade Violations
80133 Palmer Lake, CO 6.4 mi N/A 13
80132 Monument, CO 6.9 mi D 34
80921 Colorado Springs, CO 10.8 mi D 31
80109 Castle Rock, CO 11.6 mi C 9
80104 Castle Rock, CO 11.8 mi C 9
80163 Littleton, CO 12.6 mi N/A 0
80135 Sedalia, CO 13.7 mi N/A 45
80116 Franktown, CO 13.7 mi C 17
80908 Colorado Springs, CO 15.0 mi D 83
80106 Elbert, CO 16.6 mi N/A 3

Contaminants Detected in 80118

Learn more about the contaminants found in your water supply:

Overall safety breakdown

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Coverage: 14/17 risk factors Data sources →
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