PWSID
PR0004955
State
Puerto Rico
City
SANTURCE
Population served
5,524
Primary source
Surface water
Score history
▼ 10 points — the score moved from 100 to 90 on Jun 18, 2026, as newly published EPA data was incorporated.
2 score updates logged since tracking began Jun 18, 2026. Each future EPA re-score adds a point.
PFAS & contaminant readings
Latest detections from EPA’s UCMR5 monitoring (through Sep 2023). Levels in parts per trillion (ppt).
PFOS
Perfluorooctanesulfonic acid
4.3 ppt
limit 4 ppt
PFBS
3 ppt
limit —
Violations & enforcement
148
Violations on record
0
Unaddressed
12
Health-based
50
Enforcement actions
From EPA ECHO (SDWIS), most recent enforcement Aug 2025. Official EPA record →
Recent enforcement actions
- State action · SFJ Aug 2025
- State action · SOX Jul 2025
- State action · SOX Jun 2023
- State action · SOX Mar 2023
- State action · SOX Mar 2023
- State action · SFJ Mar 2023
- State action · SFJ Jan 2023
- State action · SOX Feb 2022
Area water-quality monitoring
Environmental monitoring (rivers, wells, intakes) recorded in this system’s service area in the EPA/USGS Water Quality Portal since 2018 — source/ambient water, not finished tap water. Context for the watershed, not a reading from your tap.
Nitrate
1 station · latest Aug 2023
Arsenic
1 station · latest Aug 2023
Copper
1 station · latest Aug 2023
Lead
1 station · latest Aug 2023
Source: Water Quality Portal (EPA/USGS/state agencies). Values are as-reported and aren’t health thresholds.
This profile is built from EPA public records for system PR0004955 — SDWIS violations and UCMR5 PFAS sampling. The score is system-level and can’t account for your home’s plumbing (older pipes can add lead at the tap). For health decisions, check your exact address, read the utility’s Consumer Confidence Report, and confirm with your provider.