Mill Creek Wia
PWSID: CO0210017
This system has no unresolved violations. The most recent violation on record was 2024-12-01.
This system has more violations on record than 87% of water systems in Colorado.
Violation trend: 5.6 per year over the last 5 years, up from 4.2 per year in the previous 5.
System Details
| Population Served | 67 |
| Service Connections | 40 |
| Water Source | Surface Water |
| System Type | Community Water System |
| Owner | Private |
| Status | Active |
| City | Dumont |
| EPA ZIP on File | 80436 |
Lead & Copper Testing
| Contaminant | Level | EPA Action Level | Status |
|---|---|---|---|
| Copper (90th percentile) | 3.5300 mg/L | 1.300 mg/L | Exceeds Action Level |
| Lead (90th percentile) | 0.0315 mg/L | 0.015 mg/L | Exceeds Action Level |
| Lead (90th percentile) | 0.0202 mg/L | 0.015 mg/L | Exceeds Action Level |
| Lead (90th percentile) | 0.0159 mg/L | 0.015 mg/L | Exceeds Action Level |
| Lead (90th percentile) | 0.0118 mg/L | 0.015 mg/L | Below Action Level |
| Lead (90th percentile) | 0.0110 mg/L | 0.015 mg/L | Below Action Level |
| Lead (90th percentile) | 0.0110 mg/L | 0.015 mg/L | Below Action Level |
| Lead (90th percentile) | 0.0070 mg/L | 0.015 mg/L | Below Action Level |
| Lead (90th percentile) | 0.0070 mg/L | 0.015 mg/L | Below Action Level |
| Lead (90th percentile) | 0.0065 mg/L | 0.015 mg/L | Below Action Level |
| Lead (90th percentile) | 0.0060 mg/L | 0.015 mg/L | Below Action Level |
| Lead (90th percentile) | 0.0050 mg/L | 0.015 mg/L | Below Action Level |
| Lead (90th percentile) | 0.0045 mg/L | 0.015 mg/L | Below Action Level |
| Lead (90th percentile) | 0.0040 mg/L | 0.015 mg/L | Below Action Level |
| Lead (90th percentile) | 0.0040 mg/L | 0.015 mg/L | Below Action Level |
| Lead (90th percentile) | 0.0030 mg/L | 0.015 mg/L | Below Action Level |
| Lead (90th percentile) | 0.0020 mg/L | 0.015 mg/L | Below Action Level |
| Lead (90th percentile) | 0.0015 mg/L | 0.015 mg/L | Below Action Level |
| Lead (90th percentile) | 0.0015 mg/L | 0.015 mg/L | Below Action Level |
| Lead (90th percentile) | 0.0000 mg/L | 0.015 mg/L | Below Action Level |
Violation History (54 total)
| Contaminant | Violation | Date | Health-Based | Status |
|---|---|---|---|---|
| 0200 | MR | 2024-12-01 | Major | Returned to Compliance |
| 0300 | MR | 2024-12-01 | Major | Returned to Compliance |
| 0300 | MR | 2024-12-01 | Major | Returned to Compliance |
| 1005 | MR | 2024-01-01 | Major | Returned to Compliance |
| 1005 | MR | 2024-01-01 | Major | Returned to Compliance |
| 1010 | MR | 2024-01-01 | Major | Returned to Compliance |
| 1010 | MR | 2024-01-01 | Major | Returned to Compliance |
| 1015 | MR | 2024-01-01 | Major | Returned to Compliance |
| 1015 | MR | 2024-01-01 | Major | Returned to Compliance |
| 1020 | MR | 2024-01-01 | Major | Returned to Compliance |
| 1020 | MR | 2024-01-01 | Major | Returned to Compliance |
| 1035 | MR | 2024-01-01 | Major | Returned to Compliance |
| 1035 | MR | 2024-01-01 | Major | Returned to Compliance |
| 1036 | MR | 2024-01-01 | Major | Returned to Compliance |
| 1036 | MR | 2024-01-01 | Major | Returned to Compliance |
| 1052 | MR | 2024-01-01 | Major | Returned to Compliance |
| 1052 | MR | 2024-01-01 | Major | Returned to Compliance |
| 1074 | MR | 2024-01-01 | Major | Returned to Compliance |
| 1074 | MR | 2024-01-01 | Major | Returned to Compliance |
| 1075 | MR | 2024-01-01 | Major | Returned to Compliance |
| 1075 | MR | 2024-01-01 | Major | Returned to Compliance |
| 1085 | MR | 2024-01-01 | Major | Returned to Compliance |
| 1085 | MR | 2024-01-01 | Major | Returned to Compliance |
| 1045 | MR | 2024-01-01 | Major | Returned to Compliance |
| 1045 | MR | 2024-01-01 | Major | Returned to Compliance |
| 0200 | MR | 2022-02-01 | Major | Returned to Compliance |
| 0200 | MR | 2022-02-01 | Major | Returned to Compliance |
| 0300 | MR | 2021-11-01 | Major | Returned to Compliance |
| 7500 | Other | 2020-10-12 | Returned to Compliance | |
| 2950 | MR | 2020-09-04 | Returned to Compliance | |
| 2456 | MCL Measured: 0.0613 MG/L (limit: 0.0600 MG/L) | 2020-07-01 | Yes | Returned to Compliance |
| 2456 | MCL Measured: 62.65 UG/L (limit: 60.00 UG/L) | 2020-04-01 | Yes | Returned to Compliance |
| 5000 | MR | 2018-07-01 | Returned to Compliance | |
| 7500 | Other | 2018-04-21 | Returned to Compliance | |
| 7500 | Other | 2018-01-12 | Returned to Compliance | |
| 2950 | MCL Measured: 90.25 UG/L (limit: 80.00 UG/L) | 2018-01-01 | Yes | Returned to Compliance |
| 2456 | MCL Measured: 72.60 UG/L (limit: 60.00 UG/L) | 2018-01-01 | Yes | Returned to Compliance |
| 5000 | MR | 2018-01-01 | Returned to Compliance | |
| 3014 | MR | 2017-11-01 | Major | Returned to Compliance |
| 2456 | MCL Measured: 83.25 UG/L (EPA limit: 0.060 mg/L) | 2017-10-01 | Yes | Returned to Compliance |
| 2950 | MCL Measured: 97.95 UG/L | 2017-10-01 | Yes | Returned to Compliance |
| 2456 | MCL Measured: 80.05 UG/L (EPA limit: 0.060 mg/L) | 2017-07-01 | Yes | Returned to Compliance |
| 2950 | MCL Measured: 97.60 UG/L | 2017-07-01 | Yes | Returned to Compliance |
| 2950 | MCL Measured: 0.0941 MG/L | 2017-04-01 | Yes | Returned to Compliance |
| 2456 | MCL Measured: 0.0804 MG/L (EPA limit: 0.060 mg/L) | 2017-04-01 | Yes | Returned to Compliance |
| 7500 | Other | 2017-03-11 | Returned to Compliance | |
| 5000 | TT | 2016-10-31 | Yes | Returned to Compliance |
| 5000 | MR | 2016-07-01 | Returned to Compliance | |
| 0300 | TT | 2016-06-01 | Yes | Returned to Compliance |
| 5000 | TT | 2015-04-01 | Yes | Returned to Compliance |
Showing 50 of 54 historical violations.
Understanding This Water System's Record
Mill Creek Wia is a community water system water system that draws from surface water sources and serves a population of 67 in Dumont, Colorado. This page shows its complete compliance history as reported to the EPA's Safe Drinking Water Information System (SDWIS), the federal database that tracks every public water system in the United States.
What Do These Violations Mean?
Health-based violations mean the system exceeded an EPA maximum contaminant level (MCL) or failed to provide required treatment. These indicate potential health risks from contaminants like lead, arsenic, bacteria, nitrates, or disinfection byproducts. Non-health-based violations involve monitoring, reporting, or procedural requirements — the system missed a testing deadline or failed to notify customers, but contaminant levels were not necessarily unsafe.
What Should You Do?
Your water utility is required to publish an annual Consumer Confidence Report (CCR) that details test results and any violations. If your system has active health-based violations, consider a certified water filter rated for the specific contaminants involved. The contaminant guides on this site explain health risks and filter options for common pollutants. For the most current results, contact your water utility directly — EPA data can lag weeks or months behind real-time testing.