Dillon, CO (80435): PFAS Above 2029 MCL Level
EPA data combined for 5 water systems mapped to this ZIP (largest mapped system: East Dillon Water District)
Health-based violation records by water system:
- Keystone Ranch (1)
EPA records for the water systems mapped to 80435 in Dillon, CO contain 16 recorded violations for inclusive record years 2021 through 2026, all mapped systems combined; 1 are marked health-based.
Data source: U.S. Environmental Protection Agency (EPA) SDWIS
At a Glance
- Water EPA records for water systems mapped to this ZIP show 1 health-based violation and 15 non-health-based (since 2021).
- Lead The reported 90th-percentile lead result of 0.0042 mg/L is below the EPA action level for water systems; EPA's health goal for lead is zero.
- PFAS At least one PFAS result is above an EPA MCL value (UCMR5 sampling; MCL compliance required from 2029).
- Radon EPA Zone 1 - highest county-level potential. This is not a home measurement; test before any threshold comparison.
- Flood 7 cumulative NFIP claim records. Claim evidence is historical, not current map coverage.
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Although the dataset for Dillon (80435) is limited in scope, one critical condition stands as the only elevated finding on record.
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: 3 of 4 components and 2 of 3 domains observed.
Model 4.0.0; series home-safety-v4-cross-vertical.
Safety & Health (6) CRITICAL
Your Water System
ZIP code 80435 in Dillon, Colorado is mapped to the water system East Dillon Water District (EPA ID: CO0159045). This system provides water to approximately 2,501 people from surface water sources.
There are 5 community water systems serving this area.
Water Systems Serving This Area
| System Name | EPA ID | Population | Source |
|---|---|---|---|
| East Dillon Water District | CO0159045 | 2,501 | Surface water |
| Dillon Town of | CO0159035 | 3,254 | Surface water |
| Silverthorne Town of | CO0159095 | 8,400 | Groundwater |
| Dillon Valley District | CO0159040 | 3,063 | Surface water |
| Keystone Ranch | CO0159065 | 670 | Groundwater |
Other Water Quality Reports in Colorado
- 80001 (Arvada)
- 80002 (Arvada) - 6 violations recorded for mapped water systems
- 80003 (Arvada) - 7 violations recorded for mapped water systems
- 80004 (Arvada) - 6 violations recorded for mapped water systems
- 80005 (Arvada) - 7 violations recorded for mapped water systems
- 80006 (Arvada)
- 80007 (Arvada) - 9 violations recorded for mapped water systems
- 80010 (Aurora)
- 80011 (Aurora)
- 80012 (Aurora) - 34 violations recorded for mapped water systems
- 80013 (Aurora) - 4 violations recorded for mapped water systems
- 80014 (Aurora) - 34 violations recorded for mapped water systems
- 80015 (Aurora) - 4 violations recorded for mapped water systems
- 80016 (Aurora) - 32 violations recorded for mapped water systems
- 80017 (Aurora)
- 80018 (Aurora) - 4 violations recorded for mapped water systems
- 80019 (Aurora) - 34 violations recorded for mapped water systems
- 80020 (Broomfield) - 14 violations recorded for mapped water systems
- 80021 (Broomfield) - 9 violations recorded for mapped water systems
- 80022 (Commerce City)
Nearby Water Quality Reports
- 80497 (Silverthorne) - 8 mi
- 80424 (Breckenridge) - 9 mi - 15 violations recorded for mapped water systems
- 80443 (Frisco) - 9 mi - 13 violations recorded for mapped water systems
- 80476 (Silver Plume) - 14 mi
- 80444 (Georgetown) - 17 mi
- 80498 (Silverthorne) - 18 mi - 16 violations recorded for mapped water systems
- 81657 (Vail) - 19 mi
- 80448 (Grant) - 19 mi
- 80438 (Empire) - 19 mi
- 81649 (Red Cliff) - 22 mi
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View available EPA compliance records for East Dillon Water District (CO0159045) on EPA.gov.
4 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.
PFAS Contamination Detected
PFAS ("forever chemicals") have been reported in samples from water systems associated with ZIP code 80435. One or more compound results are above the level of a federal PFAS MCL with compliance required from 2029.
Detected compounds: PFBS, PFHxS.
Highest measured level: 0.0059 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.
Environmental Hazards (11) MODERATE
Home & Infrastructure (6) MODERATE
Cost & Community (9) HIGH
CPSC product recall notices
These national notices are not matched to this ZIP code or water system.
Protect Your Home in Dillon
Based on local data for ZIP 80435, 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 Dillon has 7 FEMA flood claims 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)
Gutter Installation & Repair
The median home in 80435 was built around 1985. 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 CostsRoofing 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 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 80435 safe to drink?
EPA SDWIS records 16 violations since 2021 across the water systems mapped to ZIP 80435 (primary system: East Dillon Water District), including 1 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 80435's water come from?
The recorded water source for East Dillon Water District, a system mapped to ZIP code 80435, is Surface water. This system serves approximately 2,501 people.
How can I get my water tested in Dillon?
If East Dillon Water 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 80435 tap water?
The Lead and Copper Rule record selected for 80435 reports a 90th-percentile lead result of 0.0042 mg/L for a water system mapped to this ZIP (record date 2023-12-31). 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 80435?
80435 is mapped to a county in EPA Radon Zone 1 (high county-level radon potential; EPA recommends testing every home), located in Summit 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 80435's water?
Yes, PFAS have been detected in samples from water systems mapped to 80435. One or more PFAS results are above the level of a federal PFAS MCL with compliance required from 2029. 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 80435?
FEMA records contain 7 flood insurance claims filed in ZIP code 80435; the recorded rated-zone value (the most frequent one if there are several claims) is A01, 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
ZipCheckup. (2026). Dillon, CO (80435): PFAS Above 2029 MCL Level. https://zipcheckup.com/report/80435/
@misc{zipcheckup-report-80435,
author = {{ZipCheckup}},
title = {{Dillon, CO (80435): PFAS Above 2029 MCL Level}},
year = {2026},
url = {https://zipcheckup.com/report/80435/}
}
Page version: October 2026.
Nearby ZIP Code Reports
Water quality comparison for ZIP codes near 80435
| ZIP Code | City, State | Distance | Grade | Violations |
|---|---|---|---|---|
| 80497 | Silverthorne, CO | 7.8 mi | N/A | 0 |
| 80424 | Breckenridge, CO | 8.7 mi | N/A | 15 |
| 80443 | Frisco, CO | 8.8 mi | N/A | 13 |
| 80476 | Silver Plume, CO | 13.9 mi | N/A | 0 |
| 80444 | Georgetown, CO | 16.6 mi | N/A | 0 |
| 80498 | Silverthorne, CO | 17.6 mi | N/A | 16 |
| 81657 | Vail, CO | 19.0 mi | N/A | 0 |
| 80448 | Grant, CO | 19.2 mi | N/A | 0 |
| 80438 | Empire, CO | 19.2 mi | N/A | 0 |
| 81649 | Red Cliff, CO | 21.8 mi | N/A | 0 |
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