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Water system · PWSID CA1910153

SOUTH MONTEBELLO IRRIGATION DIST.

MONTEBELLO, CA · ~15,021 people served

Check your exact address → MONTEBELLO overview
46
Fair
PurityRadar safety score

PWSID

CA1910153

State

California

City

MONTEBELLO

Population served

15,021

Primary source

Groundwater

Score history

▼ 54 points — the score moved from 100 to 46 on Jun 18, 2026, as newly published EPA data was incorporated.

Jun 18, 2026 · score 100 Jun 18, 2026 · score 46

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 Nov 2024). Levels in parts per trillion (ppt).

PFOS

Perfluorooctanesulfonic acid

20 ppt

limit 4 ppt

Above EPA limit · 5.0×

PFOA

Perfluorooctanoic acid

8.2 ppt

limit 4 ppt

Above EPA limit · 2.1×

Lithium

9,450 ppt

limit —

No federal limit

PFPeA

6.7 ppt

limit —

No federal limit

PFHxA

6.6 ppt

limit —

No federal limit

PFDA

3.7 ppt

limit —

No federal limit

PFBS

3.4 ppt

limit —

No federal limit

Violations & enforcement

5

Violations on record

0

Unaddressed

2

Health-based

9

Enforcement actions

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

Monitoring · Lead & Copper Rule began Jun 2021 Resolved
Max contaminant level (MCL) · Arsenic health-based began Jan 2008 Resolved
Max contaminant level (MCL) · Total coliform health-based began Nov 1993 Resolved
Monitoring & reporting · Total coliform began Nov 1993 Resolved
Monitoring & reporting · Total coliform began Nov 1993 Resolved

Recent enforcement actions

  • State action · SOX Jan 2022
  • State action · SFL Jul 2021
  • State action · SIA Apr 2008
  • State action · SOX Apr 2008
  • EPA/federal action · EOX Mar 2000
  • State action · SOX Mar 1994
  • State action · SFJ Mar 1994
  • EPA/federal action · EOX Dec 1993

This profile is built from EPA public records for system CA1910153 — 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.