City of Dos Palos
PWSID: CA2410002
This system has unresolved violations related to monitoring, reporting, or procedural requirements, but none involve contaminant levels exceeding EPA health limits.
This system has more violations on record than 95% of water systems in California.
Violation trend: 4.6 per year over the last 5 years, up from 3.8 per year in the previous 5.
System Details
| Population Served | 7,452 |
| Service Connections | 2,525 |
| Water Source | Surface Water |
| System Type | Community Water System |
| Owner | Local Government |
| Status | Active |
| City | Dos Palos |
| EPA ZIP on File | 93620 |
Areas Served
- Dos Palos, Merced County
Lead & Copper Testing
| Contaminant | Level | EPA Action Level | Status |
|---|---|---|---|
| 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 |
| 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 |
1 Active Violations
| Contaminant | Violation | Date | Health-Based | Status |
|---|---|---|---|---|
| 5000 | MR | 2022-10-01 | Open |
Violation History (44 total)
| Contaminant | Violation | Date | Health-Based | Status |
|---|---|---|---|---|
| 2950 | MCL Measured: 0.0892 MG/L (limit: 0.0800 MG/L) | 2025-07-01 | Yes | Acknowledged |
| 2950 | MCL Measured: 0.0878 MG/L (limit: 0.0800 MG/L) | 2025-04-01 | Yes | Acknowledged |
| 2950 | MCL Measured: 0.0931 MG/L (limit: 0.0800 MG/L) | 2025-01-01 | Yes | Acknowledged |
| 2950 | MCL Measured: 0.0984 MG/L (limit: 0.0800 MG/L) | 2024-10-01 | Yes | Acknowledged |
| 2950 | MCL Measured: 0.1036 MG/L (limit: 0.0800 MG/L) | 2024-04-01 | Yes | Acknowledged |
| 2950 | MCL Measured: 0.0840 MG/L (limit: 0.0800 MG/L) | 2023-04-01 | Yes | Acknowledged |
| 2950 | MCL Measured: 0.0840 UG/L (limit: 0.0800 UG/L) | 2023-04-01 | Yes | Acknowledged |
| 2950 | MCL Measured: 0.0840 UG/L (limit: 0.0800 UG/L) | 2023-04-01 | Yes | Acknowledged |
| 2950 | MCL Measured: 0.0840 UG/L (limit: 0.0800 UG/L) | 2023-04-01 | Yes | Acknowledged |
| 2950 | MCL Measured: 0.1070 MG/L (limit: 0.0800 MG/L) | 2023-01-01 | Yes | Acknowledged |
| 2950 | MCL Measured: 0.1070 MG/L (limit: 0.0800 MG/L) | 2023-01-01 | Yes | Acknowledged |
| 2950 | MCL Measured: 0.1070 MG/L (limit: 0.0800 MG/L) | 2023-01-01 | Yes | Acknowledged |
| 2950 | MCL Measured: 104.50 UG/L (limit: 0.0800 UG/L) | 2022-10-01 | Yes | Acknowledged |
| 2950 | MCL Measured: 104.50 UG/L (limit: 0.0800 UG/L) | 2022-10-01 | Yes | Acknowledged |
| 2950 | MCL Measured: 104.50 UG/L (limit: 0.0800 UG/L) | 2022-10-01 | Yes | Acknowledged |
| 2950 | MCL Measured: 96.90 UG/L (limit: 80.00 UG/L) | 2022-07-01 | Yes | Acknowledged |
| 2950 | MCL Measured: 96.90 UG/L (limit: 80.00 UG/L) | 2022-07-01 | Yes | Acknowledged |
| 2950 | MCL Measured: 112.00 UG/L (limit: 80.00 UG/L) | 2022-04-01 | Yes | Acknowledged |
| 2950 | MCL Measured: 112.00 UG/L (limit: 80.00 UG/L) | 2022-04-01 | Yes | Acknowledged |
| 2950 | MCL Measured: 115.00 UG/L (limit: 80.00 UG/L) | 2022-01-01 | Yes | Acknowledged |
| 2950 | MCL Measured: 120.00 UG/L (limit: 80.00 UG/L) | 2021-10-01 | Yes | Acknowledged |
| 2950 | MCL Measured: 143.00 UG/L (limit: 80.00 UG/L) | 2021-07-01 | Yes | Acknowledged |
| 2950 | MCL Measured: 120.00 UG/L (limit: 80.00 UG/L) | 2021-04-01 | Yes | Acknowledged |
| 2950 | MCL Measured: 108.00 UG/L (limit: 80.00 UG/L) | 2021-01-01 | Yes | Acknowledged |
| 2456 | MCL Measured: 98.00 UG/L (limit: 60.00 UG/L) | 2021-01-01 | Yes | Acknowledged |
| 2950 | MCL Measured: 106.00 UG/L (limit: 80.00 UG/L) | 2020-10-01 | Yes | Acknowledged |
| 2920 | TT | 2020-10-01 | Yes | Acknowledged |
| 2950 | MCL Measured: 93.40 UG/L (limit: 80.00 UG/L) | 2020-07-01 | Yes | Acknowledged |
| 2920 | TT | 2020-07-01 | Yes | Acknowledged |
| 2950 | MCL Measured: 0.0910 MG/L (limit: 0.0800 MG/L) | 2020-04-01 | Yes | Acknowledged |
| 2920 | TT | 2020-04-01 | Yes | Acknowledged |
| 2950 | MCL Measured: 0.1100 MG/L (limit: 0.0800 MG/L) | 2019-10-01 | Yes | Acknowledged |
| 2950 | MCL Measured: 0.0890 MG/L (limit: 0.0800 MG/L) | 2019-04-01 | Yes | Acknowledged |
| 2950 | MCL Measured: 0.1050 MG/L (limit: 0.0800 MG/L) | 2019-01-01 | Yes | Acknowledged |
| 2950 | MCL Measured: 0.1040 MG/L (limit: 0.0800 MG/L) | 2018-10-01 | Yes | Acknowledged |
| 2950 | MCL Measured: 0.0940 MG/L (limit: 0.0800 MG/L) | 2018-07-01 | Yes | Acknowledged |
| 2950 | MCL Measured: 97.00 UG/L (limit: 80.00 UG/L) | 2017-04-01 | Yes | Acknowledged |
| 2950 | MCL Measured: 0.1220 MG/L (limit: 0.0800 MG/L) | 2017-01-01 | Yes | Acknowledged |
| 0200 | TT | 2017-01-01 | Yes | Returned to Compliance |
| 2950 | MCL Measured: 125.00 UG/L (limit: 80.00 UG/L) | 2016-10-01 | Yes | Acknowledged |
| 2950 | MCL Measured: 132.00 UG/L (limit: 80.00 UG/L) | 2016-07-01 | Yes | Acknowledged |
| 2950 | MCL Measured: 150.00 UG/L (limit: 80.00 UG/L) | 2016-04-01 | Yes | Acknowledged |
| 2950 | MCL Measured: 147.00 UG/L (limit: 80.00 UG/L) | 2016-01-01 | Yes | Acknowledged |
Understanding This Water System's Record
City of Dos Palos is a community water system water system that draws from surface water sources and serves a population of 7,452 in Dos Palos, California. 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.