SAN SEBASTIAN
PWSID: PR0003303 · San Sebastian, PR · Serves 24,449 people
SAN SEBASTIAN has 36 health-based violations out of 36 total. Health violations indicate contaminant levels exceeded EPA limits or required treatment was not followed.
SAN SEBASTIAN (PWSID PR0003303) is a cws water system drawing from a surface water source, regulated by the EPA Safe Drinking Water Information System (SDWIS) under the Safe Drinking Water Act. It serves approximately 24,449 people in San Sebastian, PR, and is subject to primacy enforcement by the Puerto Rico drinking-water program.
The system's federal compliance record contains 36 total violations, with 36 classified as health-based (MCL exceedances or treatment-technique failures). 3 distinct contaminants have been cited, including Haloacetic Acids (HAA5), Total Trihalomethanes (TTHM), Total Coliform (RTCR). Recorded violations span 2014–2020.
A historical violation does not necessarily describe current water quality, systems must notify customers and remediate, and monitoring-type violations often reflect reporting lapses rather than contamination. The most authoritative real-time source is the utility's annual Consumer Confidence Report. For enforcement history and corrective-action orders, consult EPA ECHO and the Puerto Rico state drinking-water program's public portal.
System Details
- EPA ID (PWSID)
- PR0003303
- System Type
- CWS
- Water Source
- Surface Water
- Location
- San Sebastian, PR
- Population Served
- 24,449
- Health Violations
- Yes (36)
What contaminants are in this water system?
| Contaminant | Violations | Health-Based |
|---|---|---|
| Haloacetic Acids (HAA5) | 22 | 22 |
| Total Trihalomethanes (TTHM) | 12 | 12 |
| Total Coliform (RTCR) | 2 | 2 |
Violation History (36)
Frequently Asked Questions
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About This Data
Water system data is from the EPA Safe Drinking Water Information System (SDWIS). Health-based violations include Maximum Contaminant Level (MCL) and Treatment Technique (TT) violations that may pose a direct risk to public health. Violation records may span multiple years.
Source: U.S. Environmental Protection Agency, SDWIS Federal Reporting Services U.S. Environmental Protection Agency, SDWIS Federal Reporting Services
Read our methodology - how this data is sourced, computed, and verified.