San Sebastian
PWSID: PR0003303
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 83% of water systems in Puerto Rico.
Violation trend: 0.0 per year over the last 5 years, down from 10.8 per year in the previous 5.
System Details
| Population Served | 24,449 |
| Service Connections | 9,157 |
| Water Source | Surface Water |
| System Type | Community Water System |
| Owner | Local Government |
| Status | Active |
| City | San Sebastian |
| EPA ZIP on File | 00685 |
Areas Served
- San Sebastian, San Sebastian Municipio County
1 Active Violations
| Contaminant | Violation | Date | Health-Based | Status |
|---|---|---|---|---|
| 5000 | MR | 1992-07-01 | Open |
Violation History (92 total)
| Contaminant | Violation | Date | Health-Based | Status |
|---|---|---|---|---|
| 7000 | Other | 2020-07-01 | Returned to Compliance | |
| 7000 | Other | 2020-07-01 | Returned to Compliance | |
| 2456 | MCL Measured: 0.0620 MG/L (limit: 0.0600 MG/L) | 2020-04-01 | Yes | Returned to Compliance |
| 2456 | MCL Measured: 0.0620 MG/L (limit: 0.0600 MG/L) | 2020-04-01 | Yes | Returned to Compliance |
| 2456 | MCL Measured: 0.0790 MG/L (limit: 0.0600 MG/L) | 2018-10-01 | Yes | Returned to Compliance |
| 2456 | MCL Measured: 0.0790 MG/L (limit: 0.0600 MG/L) | 2018-10-01 | Yes | Returned to Compliance |
| 7000 | Other | 2018-10-01 | Returned to Compliance | |
| 7000 | Other | 2018-10-01 | Returned to Compliance | |
| 2456 | MCL Measured: 0.0880 MG/L (limit: 0.0600 MG/L) | 2018-04-01 | Yes | Returned to Compliance |
| 2456 | MCL Measured: 0.0880 MG/L (limit: 0.0600 MG/L) | 2018-04-01 | Yes | Returned to Compliance |
| 0100 | MR | 2018-04-01 | Returned to Compliance | |
| 0100 | MR | 2018-04-01 | Returned to Compliance | |
| 3015 | MR | 2018-04-01 | Returned to Compliance | |
| 3015 | MR | 2018-04-01 | Returned to Compliance | |
| 3014 | MR | 2018-04-01 | Returned to Compliance | |
| 3014 | MR | 2018-04-01 | Returned to Compliance | |
| 2456 | MCL Measured: 0.0660 MG/L (limit: 0.0600 MG/L) | 2018-01-01 | Yes | Returned to Compliance |
| 2456 | MCL Measured: 0.0660 MG/L (limit: 0.0600 MG/L) | 2018-01-01 | Yes | Returned to Compliance |
| 0100 | MR | 2018-01-01 | Returned to Compliance | |
| 0100 | MR | 2018-01-01 | Returned to Compliance | |
| 3015 | MR | 2018-01-01 | Returned to Compliance | |
| 3015 | MR | 2018-01-01 | Returned to Compliance | |
| 3014 | MR | 2018-01-01 | Returned to Compliance | |
| 3014 | MR | 2018-01-01 | Returned to Compliance | |
| 0100 | MR | 2017-07-01 | Major | Returned to Compliance |
| 0100 | MR | 2017-07-01 | Major | Returned to Compliance |
| 3015 | MR | 2017-07-01 | Major | Returned to Compliance |
| 3015 | MR | 2017-07-01 | Major | Returned to Compliance |
| 3014 | MR | 2017-07-01 | Major | Returned to Compliance |
| 3014 | MR | 2017-07-01 | Major | Returned to Compliance |
| 0100 | MR | 2017-06-01 | Returned to Compliance | |
| 0100 | MR | 2017-06-01 | Returned to Compliance | |
| 3015 | MR | 2017-06-01 | Returned to Compliance | |
| 3015 | MR | 2017-06-01 | Returned to Compliance | |
| 3014 | MR | 2017-06-01 | Returned to Compliance | |
| 3014 | MR | 2017-06-01 | Returned to Compliance | |
| 0100 | MR | 2017-05-01 | Major | Returned to Compliance |
| 0100 | MR | 2017-05-01 | Major | Returned to Compliance |
| 3015 | MR | 2017-05-01 | Major | Returned to Compliance |
| 3015 | MR | 2017-05-01 | Major | Returned to Compliance |
| 3014 | MR | 2017-05-01 | Major | Returned to Compliance |
| 3014 | MR | 2017-05-01 | Major | Returned to Compliance |
| 0100 | MR | 2017-02-01 | Major | Returned to Compliance |
| 0100 | MR | 2017-02-01 | Major | Returned to Compliance |
| 3015 | MR | 2017-02-01 | Major | Returned to Compliance |
| 3015 | MR | 2017-02-01 | Major | Returned to Compliance |
| 3014 | MR | 2017-02-01 | Major | Returned to Compliance |
| 3014 | MR | 2017-02-01 | Major | Returned to Compliance |
| 0100 | MR | 2017-01-01 | Major | Returned to Compliance |
| 0100 | MR | 2017-01-01 | Major | Returned to Compliance |
Showing 50 of 91 historical violations.
Understanding This Water System's Record
San Sebastian is a community water system water system that draws from surface water sources and serves a population of 24,449 in San Sebastian, Puerto Rico. 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.