Columbia Manufacturing - Well #1
PWSID: CT0309013
This system currently has unresolved violations for: 5200. These violations mean contaminant levels exceeded EPA limits or required treatment was not performed.
This system has more violations on record than 99% of water systems in Connecticut.
Violation trend: 38.0 per year over the last 5 years, up from 22.2 per year in the previous 5.
System Details
| Population Served | 150 |
| Service Connections | 1 |
| Water Source | Groundwater |
| System Type | Non-Transient Non-Community |
| Owner | Private |
| Status | Active |
| City | Columbia |
| EPA ZIP on File | 06237 |
Areas Served
- Columbia, Tolland County
Lead & Copper Testing
| Contaminant | Level | EPA Action Level | Status |
|---|---|---|---|
| Lead (90th percentile) | 0.0800 mg/L | 0.015 mg/L | Exceeds Action Level |
| Lead (90th percentile) | 0.0144 mg/L | 0.015 mg/L | Below Action Level |
| Lead (90th percentile) | 0.0141 mg/L | 0.015 mg/L | Below Action Level |
| Lead (90th percentile) | 0.0111 mg/L | 0.015 mg/L | Below Action Level |
| Lead (90th percentile) | 0.0093 mg/L | 0.015 mg/L | Below Action Level |
| Lead (90th percentile) | 0.0066 mg/L | 0.015 mg/L | Below Action Level |
| Lead (90th percentile) | 0.0061 mg/L | 0.015 mg/L | Below Action Level |
| Lead (90th percentile) | 0.0057 mg/L | 0.015 mg/L | Below Action Level |
| Lead (90th percentile) | 0.0052 mg/L | 0.015 mg/L | Below Action Level |
| Lead (90th percentile) | 0.0048 mg/L | 0.015 mg/L | Below Action Level |
| Lead (90th percentile) | 0.0047 mg/L | 0.015 mg/L | Below Action Level |
| Lead (90th percentile) | 0.0041 mg/L | 0.015 mg/L | Below Action Level |
| Lead (90th percentile) | 0.0037 mg/L | 0.015 mg/L | Below Action Level |
| Lead (90th percentile) | 0.0034 mg/L | 0.015 mg/L | Below Action Level |
| Lead (90th percentile) | 0.0027 mg/L | 0.015 mg/L | Below Action Level |
| Lead (90th percentile) | 0.0024 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) | 0.0019 mg/L | 0.015 mg/L | Below Action Level |
2 Active Violations
| Contaminant | Violation | Date | Health-Based | Status |
|---|---|---|---|---|
| 5200 | TT | 2024-10-17 | Yes | Open |
| 5200 | RPT | 2024-10-17 | Open |
Violation History (403 total)
| Contaminant | Violation | Date | Health-Based | Status |
|---|---|---|---|---|
| 8000 | MON | 2024-11-01 | Major | Returned to Compliance |
| 8000 | MON | 2024-11-01 | Major | Returned to Compliance |
| 8000 | RPT | 2024-08-03 | Returned to Compliance | |
| 8000 | RPT | 2024-08-03 | Returned to Compliance | |
| 5000 | MR | 2024-03-31 | Returned to Compliance | |
| 5000 | MR | 2024-03-31 | Returned to Compliance | |
| 8000 | MON | 2023-11-01 | Major | Returned to Compliance |
| 8000 | MON | 2023-11-01 | Major | Returned to Compliance |
| 8000 | MON | 2023-11-01 | Major | Returned to Compliance |
| 8000 | MON | 2023-08-01 | Major | Returned to Compliance |
| 8000 | MON | 2023-08-01 | Major | Returned to Compliance |
| 8000 | MON | 2023-08-01 | Major | Returned to Compliance |
| 8000 | MON | 2023-08-01 | Major | Returned to Compliance |
| 8000 | MON | 2023-07-01 | Major | Returned to Compliance |
| 8000 | MON | 2023-07-01 | Major | Returned to Compliance |
| 8000 | MON | 2023-07-01 | Major | Returned to Compliance |
| 8000 | MON | 2023-07-01 | Major | Returned to Compliance |
| 5000 | MR | 2023-04-01 | Returned to Compliance | |
| 5000 | MR | 2023-04-01 | Returned to Compliance | |
| 8000 | TT | 2023-01-15 | Yes | Returned to Compliance |
| 8000 | TT | 2023-01-15 | Yes | Returned to Compliance |
| 8000 | TT | 2023-01-15 | Yes | Returned to Compliance |
| 7500 | Other | 2023-01-15 | Returned to Compliance | |
| 7500 | Other | 2023-01-15 | Returned to Compliance | |
| 8000 | MON | 2023-01-01 | Major | Returned to Compliance |
| 8000 | MON | 2023-01-01 | Major | Acknowledged |
| 8000 | MON | 2023-01-01 | Major | Returned to Compliance |
| 8000 | MON | 2023-01-01 | Major | Returned to Compliance |
| 8000 | MON | 2022-10-01 | Major | Returned to Compliance |
| 8000 | MON | 2022-10-01 | Major | Returned to Compliance |
| 5000 | MR | 2022-09-29 | Returned to Compliance | |
| 5000 | MR | 2022-09-29 | Returned to Compliance | |
| 5000 | MR | 2022-04-01 | Returned to Compliance | |
| 5000 | MR | 2022-04-01 | Returned to Compliance | |
| 2210 | MR | 2022-01-01 | Major | Returned to Compliance |
| 2210 | MR | 2022-01-01 | Major | Acknowledged |
| 2210 | MR | 2022-01-01 | Major | Acknowledged |
| 2214 | MR | 2022-01-01 | Major | Returned to Compliance |
| 2214 | MR | 2022-01-01 | Major | Acknowledged |
| 2214 | MR | 2022-01-01 | Major | Acknowledged |
| 2216 | MR | 2022-01-01 | Major | Returned to Compliance |
| 2216 | MR | 2022-01-01 | Major | Acknowledged |
| 2216 | MR | 2022-01-01 | Major | Acknowledged |
| 2248 | MR | 2022-01-01 | Major | Returned to Compliance |
| 2248 | MR | 2022-01-01 | Major | Acknowledged |
| 2248 | MR | 2022-01-01 | Major | Acknowledged |
| 2251 | MR | 2022-01-01 | Major | Returned to Compliance |
| 2251 | MR | 2022-01-01 | Major | Acknowledged |
| 2251 | MR | 2022-01-01 | Major | Acknowledged |
| 2378 | MR | 2022-01-01 | Major | Returned to Compliance |
Showing 50 of 401 historical violations.
Understanding This Water System's Record
Columbia Manufacturing - Well #1 is a non-transient non-community water system that draws from groundwater sources and serves a population of 150 in Columbia, Connecticut. 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.