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Water system · PWSID CA4310004

CITY OF GILROY

GILROY, CA · ~59,203 people served

Check your exact address → GILROY overview
66
Fair
PurityRadar safety score

PWSID

CA4310004

State

California

City

GILROY

Population served

59,203

Primary source

Groundwater

Score history

▼ 34 points — the score moved from 100 to 66 on Jun 18, 2026, as newly published EPA data was incorporated.

Jun 18, 2026 · score 100 Jun 18, 2026 · score 66

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 2025). Levels in parts per trillion (ppt).

PFOS

Perfluorooctanesulfonic acid

5.8 ppt

limit 4 ppt

Above EPA limit · 1.4×

PFOA

Perfluorooctanoic acid

5.5 ppt

limit 4 ppt

Above EPA limit · 1.4×

PFHxS

Perfluorohexanesulfonic acid

3.5 ppt

limit 10 ppt

Below EPA limit

Lithium

11,000 ppt

limit —

No federal limit

PFPeA

4.5 ppt

limit —

No federal limit

PFBS

4 ppt

limit —

No federal limit

PFHpA

3.6 ppt

limit —

No federal limit

PFHxA

3.6 ppt

limit —

No federal limit

Violations & enforcement

1

Violations on record

0

Unaddressed

1

Health-based

2

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Jul 2022. Official EPA record →

Max contaminant level (MCL) · Nitrate health-based began Jun 2022 Resolved

Recent enforcement actions

  • State action · SOX Jul 2022
  • State action · SFL Jul 2022

This profile is built from EPA public records for system CA4310004 — 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.