CheckPFAS

City overview · Los Angeles County

PFAS in Los Angeles, CA

High Risk

EPA UCMR 5 tested 15 public water systems serving the Los Angeles area across 64 ZIP codes. At least one utility serving Los Angeles has PFAS above the EPA's enforceable limit.

Water systems tested
15
Systems above EPA limits
4
ZIP codes covered
64
County
Los Angeles County, California

Plain English

01What this means for Los Angeles

Across the 15 public water systems tested in the Los Angeles area under EPA UCMR 5, one or more measured a PFAS compound above the federal Maximum Contaminant Level. Contamination varies by utility and neighborhood — find your exact ZIP code below to see the system that serves you. If you're in an affected area, an NSF/ANSI 53 or 58 certified filter (carbon block or reverse osmosis) is the most reliable way to reduce PFAS at the tap.

By utility

02Water systems serving Los Angeles

  1. MAYWOOD MUTUAL WATER CO. #3

    4 detected · 2 above limit · PWSID CA1910086

    High Risk

  2. GSWC - BELL, BELL GARDENS

    7 detected · 1 above limit · PWSID CA1910011

    High Risk

  3. COMMERCE-CITY, WATER DEPT.

    7 detected · 1 above limit · PWSID CA1910050

    High Risk

  4. CALIFORNIA WATER SERVICE CO. - ELA

    6 detected · 1 above limit · PWSID CA1910036

    High Risk

  5. LOS ANGELES-CITY, DEPT. OF WATER & POWER

    1 detected · 0 above limit · PWSID CA1910067

    Low Level

  6. GSWC - FLORENCE/GRAHAM

    1 detected · 0 above limit · PWSID CA1910077

    Low Level

  7. GSWC - CULVER CITY

    1 detected · 0 above limit · PWSID CA1910030

    Low Level

  8. GSWC - SOUTHWEST

    1 detected · 0 above limit · PWSID CA1910155

    Low Level

  9. MONTEBELLO-CITY, WATER DEPT.

    1 detected · 0 above limit · PWSID CA1910117

    Low Level

  10. CAL/AM WATER COMPANY - BALDWIN HILLS

    1 detected · 0 above limit · PWSID CA1910052

    Low Level

  11. HAWTHORNE-CITY WATER DEPT.

    1 detected · 0 above limit · PWSID CA1910047

    Low Level

  12. BEVERLY HILLS-CITY, WATER DEPT.

    1 detected · 0 above limit · PWSID CA1910156

    Low Level

  13. VERNON-CITY, WATER DEPT.

    1 detected · 0 above limit · PWSID CA1910167

    Low Level

  14. LIBERTY UTILITIES - COMPTON

    1 detected · 0 above limit · PWSID CA1910021

    Low Level

  15. GSWC - Willowbrook

    1 detected · 0 above limit · PWSID CA1910072

    Low Level

By ZIP code

03Find your exact result

Contamination can differ block to block. Select your ZIP code for the precise reading at the utility that serves your address.

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Source & Methodology

About this data

Source
EPA UCMR 5
Sampling period
January 2023 – December 2025
Aggregation
15 utilities across 64 ZIP codes
Detection threshold (MRL)
~1.5–2 ppt

City-level figures aggregate the individual public water systems tested under EPA UCMR 5 whose service area falls within the Los Angeles area. Values reflect water quality at the treatment plant; your home's plumbing can affect what reaches your tap. Select your ZIP above for the utility-specific reading.