CheckPFAS

ZIP 90222 · California

Compton, CA

Low Level
See the full Compton overview — all utilities & ZIP codes →

1 compound detected

Trace detections — well below EPA limits

lithium no federal limit
67700.00 ppt
0 101550 ppt
Above EPA limit Below EPA limit No federal limit EPA MCL
PFAS Detected
3
Above EPA Limits
0
Water Systems
3
Highest % of MCL
N/A

Plain English

01What this means for you

Very low PFAS concentrations were detected — well below the EPA's Maximum Contaminant Level. For most healthy adults, this represents a minimal incremental risk from drinking water. The most proportionate response is to note the result and check your utility's Consumer Confidence Report again next year. If you have specific health concerns or vulnerable household members, speaking with your doctor and optionally installing a certified point-of-use filter is a reasonable step.

How to read your annual CCR → PFAS health background →

02LIBERTY UTILITIES - COMPTON

Low Level

PWSID · CA1910021

Water Type
Surface Water
PFAS Detected
1
Above MCL
0
State
California
Data Period
2023–2025

PFAS test results

CompoundDetectedvs. EPA LimitEPA LimitStatus
lithium
67700.00pptNo federal limit—Unregulated

03GSWC - Willowbrook

Low Level

PWSID · CA1910072

Water Type
Surface Water
PFAS Detected
1
Above MCL
0
State
California
Data Period
2023–2025

PFAS test results

CompoundDetectedvs. EPA LimitEPA LimitStatus
lithium
42000.00pptNo federal limit—Unregulated

04GSWC - SOUTHWEST

Low Level

PWSID · CA1910155

Water Type
Surface Water
PFAS Detected
1
Above MCL
0
State
California
Data Period
2023–2025

PFAS test results

CompoundDetectedvs. EPA LimitEPA LimitStatus
lithium
51300.00pptNo federal limit—Unregulated

Note: ZIP code 90222 is served by 3 separate water utilities. Results above show data for each system independently.

Source & Methodology

About this data

Source
EPA UCMR 5
Data released
January 2026
Sampling period
January 2023 – December 2025
Systems tested
~10,000 public water systems
Water systems (PWSID)
CA1910021 · CA1910072 · CA1910155
Detection threshold (MRL)
~1.5–2 ppt

Values shown are the highest single-sample concentration measured at entry points to the distribution system. Results reflect water quality at the treatment plant — aging pipes, building plumbing, and on-site storage can affect what actually reaches your tap. "Not detected" means below the MRL, not literally zero.

View raw EPA UCMR 5 occurrence data →

Related

More resources for your area

  1. 01

    How to read your utility's CCR

    Decode your annual Consumer Confidence Report

    →
  2. 02

    On a private well?

    PFAS testing guide for well owners — EPA rules don't apply

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  3. 03

    All water systems in California

    Compare utilities statewide

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  4. 04

    Which filter removes PFAS?

    Compare every method by removal rate & NSF certification

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  5. 05

    PFAS health effects

    What the science shows, condition by condition

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  6. 06

    PFAS compound guide

    Health effects & EPA limits for each compound

    →