Is SAN SEBASTIAN's water safe to drink?
SAN SEBASTIAN has a health-based violation on record, but none in the last five years - an older issue, not necessarily a current one. Population served: 25,752, over 9,645 connections.
Ranked against every other system in this dataset
Out of 12,903 systems in this dataset, SAN SEBASTIAN ranks 127th by violation burden (99th percentile) - 150 violations total, 77 health-baseds.
Against the PR average
PR's 103 covered systems average 46.1 health-based violations each; SAN SEBASTIAN carries 77, more than typical for the state. See the lead and copper guide for why lead counts differently.
Most recent violation on record
SAN SEBASTIAN's most recent violation on record is dated 2020-01-07, with the most recent health-based one dated 2020-01-04. Last reported to EPA: 06/05/2026.
The concern categories on record
SAN SEBASTIAN's flagged contaminants and rule violations, grouped by what they actually mean for a filter choice rather than left as EPA's raw code list:
- Microbial contamination / treatment technique - flagged from: Coliform (TCR); Interim Enhanced Surface Water Treatment Rule; Surface Water Treatment Rule
- Synthetic organic chemicals / pesticides / VOCs - flagged from: CARBON, TOTAL
- Disinfection byproducts - flagged from: TTHM; Total Haloacetic Acids (HAA5)
The most severe category on record is microbial contamination / treatment technique, which points toward a microbial-class filter if you want to address it directly.
What SAN SEBASTIAN's record does not cover
This is what SAN SEBASTIAN reported to its state primacy agency and EPA under the Safe Drinking Water Act - real regulatory record, not a lab test of your specific tap. This record - 77 health-based violations on file for SAN SEBASTIAN - stops at the meter and cannot see household plumbing on the other side of it. The guide to what this data misses covers that gap.