Dillon Valley District
EPA ID: CO0159040 · 3,063 people served · 1 ZIP code
ZipCheckup's reading of EPA SDWIS for Dillon Valley District (CO0159040): 3 EPA violations in the last five years. Water monitoring history for Dillon Valley District includes 3 violations, each addressed and closed - the system holds no active EPA enforcement today for its 3,063 residents.
Data: EPA SDWIS
Service Area Map
Coverage area for Dillon Valley District Source: EPA SDWIS service area boundaries.
Service area boundary
Service Area Demographics
The Dillon Valley District serves a community with a median household income of $86,023 and an estimated 8,447 residents across its service area. 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
Detected Contaminants
How Dillon Valley District compares to EPA limits
What This Means For You
E. coli at 1 Zero tolerance (any positive sample triggers immediate action) exceeds the EPA maximum of Zero tolerance (any positive sample triggers immediate action). Severe GI illness; potentially fatal kidney failure in children. Consider UV disinfection (99.99%) filtration.
Revised Total Coliform Rule at 1 presence exceeds the EPA maximum of presence.
PFAS Detected in Service Area
PFAS ("forever chemicals") have been detected in water serving this system's area. 7 detections recorded. 3 exceed federal EPA limits (4 ppt for PFOA/PFOS).
Chlorite was detected in this water system. ferrous sulfate reduction filtration can reduce exposure.
Find a certified water filter →Comparable Water Systems
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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 | E. coli | Non-health-based | Resolved |
| October 1, 2025 | Revised Total Coliform Rule | Non-health-based | Resolved |
| January 1, 2025 | Chlorite | Non-health-based | Resolved |
Contaminants Detected
The following contaminants have been flagged in EPA records for this water system:
| Contaminant | Category | Violations | Health-Based |
|---|---|---|---|
| Chlorite | Disinfection Byproducts | 1 | No |
| E. coli | Microbiological | 1 | No |
| Revised Total Coliform Rule | Microbiological | 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 | N/A |
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: Let cold water run for 2 minutes before drinking — this helps flush lead from your pipes.
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 the full compliance record 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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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.