DILLON TOWN OF
Colorado — Community Water System — PWSID: CO0159035
System Information
| PWSID | CO0159035 |
| System Name | DILLON TOWN OF |
| System Type | Community Water System |
| Water Source | Surface Water |
| Activity Status | Active |
| Owner Type | Local |
| EPA Region | 08 |
| Serves School | No |
| Wholesaler | No |
| First Reported | Mar 20, 1979 |
| Last Reported | Nov 17, 2025 |
Location & Contact
| State | Colorado |
| City | DILLON |
| ZIP Code | 80435 |
| Address | — |
| Organization | HELMAN, MARK A |
| Phone | 970-262-3426 |
Population & Service
| Population Served | 3,254 |
| Service Connections | 566 |
Drinking Water Violations (20)
This water system has 20 violations recorded in the EPA SDWIS database.
| Begin Date | End Date | Contaminant | Category | Health-Based | Major | Measured | Federal MCL | State MCL | Status | Return to Compliance | Rule |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Jul 1, 2023 | Sep 30, 2023 | Total Haloacetic Acids (HAA5) | MR | No | Yes | — | 0.060 mg/L | — | Resolved | Sep 30, 2023 | Stage 2 Disinfectants and Disinfection Byproducts Rule |
| Jul 1, 2023 | Sep 30, 2023 | TTHM | MR | No | Yes | — | 0.080 mg/L | — | Resolved | Sep 30, 2023 | Stage 2 Disinfectants and Disinfection Byproducts Rule |
| Jul 1, 2023 | Sep 30, 2023 | TTHM | MR | No | Yes | — | 0.080 mg/L | — | Resolved | Sep 30, 2023 | Stage 2 Disinfectants and Disinfection Byproducts Rule |
| Jul 1, 2023 | Sep 30, 2023 | TTHM | MR | No | Yes | — | 0.080 mg/L | — | Resolved | Sep 30, 2023 | Stage 2 Disinfectants and Disinfection Byproducts Rule |
| Jul 1, 2023 | Sep 30, 2023 | Total Haloacetic Acids (HAA5) | MR | No | Yes | — | 0.060 mg/L | — | Resolved | Sep 30, 2023 | Stage 2 Disinfectants and Disinfection Byproducts Rule |
| Jul 1, 2023 | Sep 30, 2023 | Total Haloacetic Acids (HAA5) | MR | No | Yes | — | 0.060 mg/L | — | Resolved | Sep 30, 2023 | Stage 2 Disinfectants and Disinfection Byproducts Rule |
| Oct 1, 2017 | Oct 31, 2017 | E. COLI | MR | No | Yes | — | — | — | Resolved | Oct 31, 2017 | Long Term 2 Enhanced Surface Water Treatment Rule |
| Oct 1, 2017 | Oct 31, 2017 | E. COLI | MR | No | Yes | — | — | — | Resolved | Oct 31, 2017 | Long Term 2 Enhanced Surface Water Treatment Rule |
| Oct 1, 2017 | Oct 31, 2017 | E. COLI | MR | No | Yes | — | — | — | Resolved | Oct 31, 2017 | Long Term 2 Enhanced Surface Water Treatment Rule |
| Jul 1, 2016 | Sep 30, 2016 | Total Haloacetic Acids (HAA5) | MR | No | No | — | 0.060 mg/L | — | Resolved | Sep 30, 2016 | Stage 2 Disinfectants and Disinfection Byproducts Rule |
| Jul 1, 2016 | Sep 30, 2016 | Total Haloacetic Acids (HAA5) | MR | No | No | — | 0.060 mg/L | — | Resolved | Sep 30, 2016 | Stage 2 Disinfectants and Disinfection Byproducts Rule |
| Jul 1, 2016 | Sep 30, 2016 | TTHM | MR | No | No | — | 0.080 mg/L | — | Resolved | Sep 30, 2016 | Stage 2 Disinfectants and Disinfection Byproducts Rule |
| Jul 1, 2016 | Sep 30, 2016 | TTHM | MR | No | No | — | 0.080 mg/L | — | Resolved | Sep 30, 2016 | Stage 2 Disinfectants and Disinfection Byproducts Rule |
| Jul 1, 2016 | Sep 30, 2016 | TTHM | MR | No | No | — | 0.080 mg/L | — | Resolved | Sep 30, 2016 | Stage 2 Disinfectants and Disinfection Byproducts Rule |
| Jan 1, 2016 | — | Lead and Copper Rule | MR | No | No | — | TT | — | Resolved | Sep 26, 2016 | Lead and Copper Rule |
| Jan 1, 2016 | — | Lead and Copper Rule | MR | No | No | — | TT | — | Resolved | Sep 26, 2016 | Lead and Copper Rule |
| Oct 1, 2007 | Dec 31, 2007 | TTHM | MR | No | Yes | — | 0.080 mg/L | — | Resolved | Dec 31, 2007 | Stage 1 Disinfectants and Disinfection Byproducts Rule |
| Oct 1, 2007 | Dec 31, 2007 | Total Haloacetic Acids (HAA5) | MR | No | Yes | — | 0.060 mg/L | — | Resolved | Dec 31, 2007 | Stage 1 Disinfectants and Disinfection Byproducts Rule |
| Oct 1, 2007 | Dec 31, 2007 | TTHM | MR | No | Yes | — | 0.080 mg/L | — | Resolved | Dec 31, 2007 | Stage 1 Disinfectants and Disinfection Byproducts Rule |
| Oct 1, 2007 | Dec 31, 2007 | TTHM | MR | No | Yes | — | 0.080 mg/L | — | Resolved | Dec 31, 2007 | Stage 1 Disinfectants and Disinfection Byproducts Rule |
About This Water System
Public water system data comes from the EPA Safe Drinking Water Information System (SDWIS). Systems with violations must notify customers. Contact your water utility for the latest annual water quality report.