PWSID
CA1910007
State
California
City
AZUSA
Population served
110,044
Primary source
Surface water
Score history
▼ 47 points — the score moved from 100 to 53 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 Jun 2024). Levels in parts per trillion (ppt).
PFOA
Perfluorooctanoic acid
7.7 ppt
limit 4 ppt
PFOS
Perfluorooctanesulfonic acid
5.3 ppt
limit 4 ppt
PFHxA
3.5 ppt
limit —
Violations & enforcement
1
Violations on record
0
Unaddressed
1
Health-based
2
Enforcement actions
From EPA ECHO (SDWIS), most recent enforcement Dec 1992. Official EPA record →
Recent enforcement actions
- State action · SOX Dec 1992
- State action · SFJ Dec 1992
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 Sep 2020
Arsenic
1 station · latest Sep 2020
Copper
1 station · latest Sep 2020
Fluoride
1 station · latest Sep 2020
Lead
1 station · latest Sep 2020
Uranium
1 station · latest Sep 2020
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 CA1910007 — 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.