Dillon Valley District
EPA ID: CO0159040 · 3,063 people served · 1 ZIP code
ZipCheckup's reading of EPA records for Dillon Valley District (CO0159040): 3 violations on record since 2021. Looking at the EPA enforcement file for Dillon Valley District, 3 violations are listed in the dataset, and none is recorded as open for the 3,063 people in its service area.
Data: EPA SDWIS
Service Area Map
Coverage area for Dillon Valley District Source: EPA SDWIS service area boundaries.
Service area boundary
Demographics of ZIP Codes Served
The ZIP codes associated with Dillon Valley District have a median household income of $86,023 and about 8,447 residents live in those ZIP codes (Census; not the number of people this system supplies). Approximately 53% of housing stock was built before 1986, which increases the likelihood of lead service lines and older plumbing.
🌊 Where Does Your Water Come From?
Dillon Valley District's water is drawn from rivers, lakes, or reservoirs. Surface water sources are more exposed to agricultural runoff, stormwater, and upstream discharges, but they typically receive more intensive treatment before reaching your tap.
Infrastructure Risk
PFAS in ZIP Codes This System Serves
PFAS ("forever chemicals") have been reported in samples from water systems associated with the ZIP codes in this system's area. These results can come from other water systems serving the same ZIP codes; check the UCMR5 section for any results reported for this system. 7 detections recorded. 3 detections are above the level of a federal PFAS MCL (4 ppt for PFOA and PFOS), with compliance required from 2029.
Comparable Water Systems
Similar-sized systems in Colorado
Estimated Remediation Costs
Average estimated costs across ZIP codes served by this system
Based on national averages for common remediation projects. Actual costs vary by property. Only issues flagged by EPA, FEMA, or state data for each ZIP code are included.
System Overview
Dillon Valley District (EPA ID: CO0159040) is a community water system in Colorado that serves approximately 3,063 people from surface water sources.
This system serves ZIP code 80435 in Dillon.
Violation History
Status breakdown for accepted records with record years 2021-2026: 3 resolved, 0 archived, 0 addressed, and 0 unaddressed. Under this source contract, current noncompliance is the sum of addressed and unaddressed records. Archived and resolved records are excluded from current noncompliance.
Recent Violations
| Date | Contaminant | Type | Status |
|---|---|---|---|
| November 1, 2025 | Surface Water Treatment Rule | Non-health-based | Resolved |
| October 1, 2025 | Chlorine | Non-health-based | Resolved |
| January 1, 2025 | CARBON, TOTAL | Non-health-based | Resolved |
Contaminants Detected
The following contaminants have been flagged in EPA records for this water system:
| Contaminant | Category | Violations | Health-Based |
|---|---|---|---|
| CARBON, TOTAL | Monitoring & Reporting | 1 | No |
| Surface Water Treatment Rule | Monitoring & Reporting | 1 | No |
| Chlorine | Monitoring & Reporting | 1 | No |
Lead & Copper
EPA Lead and Copper Rule evidence attributed directly to this water system:
| Lead Level | Exceeds Action Level | Sample Date |
|---|---|---|
| 0.003 mg/L | No | 2025-12-31 |
No copper action-level exceedance record appears for this PWSID in the accepted LCR snapshot. This does not establish a clean copper measurement.
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: Ask your water utility whether running cold water for 2 minutes is enough to flush your plumbing before drinking.
ZIP Codes Served
Coverage: Service area ZIP codes sourced from EPA Community Water System Service Area Boundaries v3 (March 2026 release). These ZIPs reflect the actual deployment footprint recorded by CO or modeled from parcel and building-footprint data.
- 80435 - Dillon
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View available EPA compliance records for Dillon Valley District (CO0159040) on EPA.gov.
Frequently Asked Questions
Is Dillon Valley District water safe to drink?
The accepted 2026Q2 ECHO snapshot shows no current noncompliance for Dillon Valley District; its 3 accepted 2021-2026 records are resolved or archived. Historical compliance status does not establish conditions at a specific tap.
How many people does Dillon Valley District serve?
Dillon Valley District serves approximately 3,063 people across 1 ZIP code in Colorado.
Where does Dillon Valley District get its water?
The primary water source is surface water.
Frequently Asked Questions
How to cite this page
ZipCheckup. (n.d.). Dillon Valley District (CO): 3 EPA Violations. https://zipcheckup.com/water-system/co0159040/
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title = {{Dillon Valley District (CO): 3 EPA Violations}},
year = {n.d.},
url = {https://zipcheckup.com/water-system/co0159040/}
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What You Can Do
Test your water
Home test kits can detect lead, bacteria, and other contaminants at your tap. Find the right filter →
Check your specific ZIP code
Water quality can vary within a system. View nearest ZIP report →
Contact your utility
Dillon Valley District (EPA ID: CO0159040) - request the latest Consumer Confidence Report or ask about specific contaminants.