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Water system · PWSID CA1910086

MAYWOOD MUTUAL WATER CO. #3

MAYWOOD, CA · ~6,059 people served

Check your exact address → MAYWOOD overview
37
Action needed
PurityRadar safety score

PWSID

CA1910086

State

California

City

MAYWOOD

Population served

6,059

Primary source

SWP

Score history

▼ 63 points — the score moved from 100 to 37 on Jun 18, 2026, as newly published EPA data was incorporated.

Jun 18, 2026 · score 100 Jun 18, 2026 · score 37

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

PFOS

Perfluorooctanesulfonic acid

26 ppt

limit 4 ppt

Above EPA limit · 6.6×

PFOA

Perfluorooctanoic acid

7.3 ppt

limit 4 ppt

Above EPA limit · 1.8×

PFHxS

Perfluorohexanesulfonic acid

6.1 ppt

limit 10 ppt

Near EPA limit

Lithium

9,770 ppt

limit —

No federal limit

Violations & enforcement

5

Violations on record

0

Unaddressed

3

Health-based

8

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Jun 2020. Official EPA record →

Monitoring & reporting · Lead & Copper Rule began Oct 2019 Resolved
Max contaminant level (MCL) · Total coliform health-based began Jul 2003 Resolved
Max contaminant level (MCL) · Total coliform health-based began Aug 2001 Resolved
Max contaminant level (MCL) · Total coliform health-based began Aug 1993 Resolved
Monitoring & reporting · Total coliform began Aug 1993 Resolved

Recent enforcement actions

  • State action · SOX Jun 2020
  • State action · SFJ Jan 2020
  • State action · SFL Aug 2003
  • State action · SOX Aug 2003
  • State action · SFL Oct 2001
  • State action · SOX Oct 2001
  • State action · SOX Sep 1993
  • State action · SFJ Sep 1993

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.

ContaminantMedian · max · samples

Nitrate

1 station · latest Jun 2021

0.093 · max 0.093 mg/l as N · 2

Atrazine

1 station · latest Jun 2021

0.007 · max 0.007 ug/l · 1

Fluoride

1 station · latest Jun 2021

0.33 · max 0.33 mg/l · 1

Lead

1 station · latest Jun 2021

0.031 · max 0.031 ug/l · 1

Manganese

1 station · latest Jun 2021

44 · max 44 ug/l · 1

Uranium

1 station · latest Jun 2021

0.069 · max 0.069 ug/l · 1

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 CA1910086 — 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.