PWSID
PR0004534
State
Puerto Rico
City
JUANA DIAZ
Population served
4,269
Primary source
Groundwater
Score history
▼ 33 points — the score moved from 100 to 67 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 Aug 2023). Levels in parts per trillion (ppt).
PFOS
Perfluorooctanesulfonic acid
4.8 ppt
limit 4 ppt
PFHxS
Perfluorohexanesulfonic acid
4 ppt
limit 10 ppt
PFBS
5 ppt
limit —
Violations & enforcement
249
Violations on record
0
Unaddressed
2
Health-based
59
Enforcement actions
From EPA ECHO (SDWIS), most recent enforcement Dec 2024. Official EPA record →
Recent enforcement actions
- State action · SFJ Dec 2024
- State action · SOX Jun 2024
- State action · SOX Jun 2023
- State action · SFJ May 2023
- State action · SFJ Mar 2023
- State action · SOX Aug 2020
- State action · SOX Oct 2019
- State action · SOX Aug 2019
This profile is built from EPA public records for system PR0004534 — 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.