Twenty Mile Coal Co
PWSID: CO0254200
This system has no unresolved violations. The most recent violation on record was 2025-04-01.
This system has more violations on record than 95% of water systems in Colorado.
Violation trend: 1.2 per year over the last 5 years, down from 25.2 per year in the previous 5.
System Details
| Population Served | 475 |
| Service Connections | 5 |
| Water Source | Surface Water Purchased |
| System Type | Non-Transient Non-Community |
| Owner | Private |
| Status | Active |
| City | Oak Creek |
| EPA ZIP on File | 80467 |
Lead & Copper Testing
| Contaminant | Level | EPA Action Level | Status |
|---|---|---|---|
| Lead (90th percentile) | 0.0104 mg/L | 0.015 mg/L | Below Action Level |
| Lead (90th percentile) | 0.0029 mg/L | 0.015 mg/L | Below Action Level |
| Lead (90th percentile) | 0.0025 mg/L | 0.015 mg/L | Below Action Level |
| Lead (90th percentile) | 0.0025 mg/L | 0.015 mg/L | Below Action Level |
| Lead (90th percentile) | 0.0022 mg/L | 0.015 mg/L | Below Action Level |
| Lead (90th percentile) | 0.0016 mg/L | 0.015 mg/L | Below Action Level |
| Lead (90th percentile) | 0.0012 mg/L | 0.015 mg/L | Below Action Level |
| Lead (90th percentile) | 0.0012 mg/L | 0.015 mg/L | Below Action Level |
| Lead (90th percentile) | 0.0007 mg/L | 0.015 mg/L | Below Action Level |
| Lead (90th percentile) | 0.0003 mg/L | 0.015 mg/L | Below Action Level |
| Lead (90th percentile) | 0.0000 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 (138 total)
| Contaminant | Violation | Date | Health-Based | Status |
|---|---|---|---|---|
| 5000 | MR | 2025-04-01 | Returned to Compliance | |
| 5000 | MR | 2025-04-01 | Returned to Compliance | |
| 2946 | MR | 2022-01-01 | Major | Returned to Compliance |
| 2946 | MR | 2022-01-01 | Major | Acknowledged |
| 1040 | MR | 2022-01-01 | Major | Returned to Compliance |
| 1040 | MR | 2022-01-01 | Major | Acknowledged |
| 2378 | MR | 2020-01-01 | Major | Acknowledged |
| 2378 | MR | 2020-01-01 | Major | Acknowledged |
| 2380 | MR | 2020-01-01 | Major | Acknowledged |
| 2380 | MR | 2020-01-01 | Major | Acknowledged |
| 2955 | MR | 2020-01-01 | Major | Acknowledged |
| 2955 | MR | 2020-01-01 | Major | Acknowledged |
| 2964 | MR | 2020-01-01 | Major | Acknowledged |
| 2964 | MR | 2020-01-01 | Major | Acknowledged |
| 2968 | MR | 2020-01-01 | Major | Acknowledged |
| 2968 | MR | 2020-01-01 | Major | Acknowledged |
| 2969 | MR | 2020-01-01 | Major | Acknowledged |
| 2969 | MR | 2020-01-01 | Major | Acknowledged |
| 2976 | MR | 2020-01-01 | Major | Acknowledged |
| 2976 | MR | 2020-01-01 | Major | Acknowledged |
| 2977 | MR | 2020-01-01 | Major | Acknowledged |
| 2977 | MR | 2020-01-01 | Major | Acknowledged |
| 2979 | MR | 2020-01-01 | Major | Acknowledged |
| 2979 | MR | 2020-01-01 | Major | Acknowledged |
| 2980 | MR | 2020-01-01 | Major | Acknowledged |
| 2980 | MR | 2020-01-01 | Major | Acknowledged |
| 2981 | MR | 2020-01-01 | Major | Acknowledged |
| 2981 | MR | 2020-01-01 | Major | Acknowledged |
| 2982 | MR | 2020-01-01 | Major | Acknowledged |
| 2982 | MR | 2020-01-01 | Major | Acknowledged |
| 2983 | MR | 2020-01-01 | Major | Acknowledged |
| 2983 | MR | 2020-01-01 | Major | Acknowledged |
| 2984 | MR | 2020-01-01 | Major | Acknowledged |
| 2984 | MR | 2020-01-01 | Major | Acknowledged |
| 2985 | MR | 2020-01-01 | Major | Acknowledged |
| 2985 | MR | 2020-01-01 | Major | Acknowledged |
| 2987 | MR | 2020-01-01 | Major | Acknowledged |
| 2987 | MR | 2020-01-01 | Major | Acknowledged |
| 2989 | MR | 2020-01-01 | Major | Acknowledged |
| 2989 | MR | 2020-01-01 | Major | Acknowledged |
| 2990 | MR | 2020-01-01 | Major | Acknowledged |
| 2990 | MR | 2020-01-01 | Major | Acknowledged |
| 2991 | MR | 2020-01-01 | Major | Acknowledged |
| 2991 | MR | 2020-01-01 | Major | Acknowledged |
| 2992 | MR | 2020-01-01 | Major | Acknowledged |
| 2992 | MR | 2020-01-01 | Major | Acknowledged |
| 2996 | MR | 2020-01-01 | Major | Acknowledged |
| 2996 | MR | 2020-01-01 | Major | Acknowledged |
| 1025 | MR | 2020-01-01 | Major | Acknowledged |
| 1025 | MR | 2020-01-01 | Major | Acknowledged |
Showing 50 of 138 historical violations.
Understanding This Water System's Record
Twenty Mile Coal Co is a non-transient non-community water system that draws from surface water purchased sources and serves a population of 475 in Oak Creek, 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.