County Service Area 7

San Mateo County, CA
CA4100509
People Served
300
Water Source
Surface Water
Counties
San Mateo County
Data from
2023
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Contaminants Exceeding Limits

No contaminants have exceeded the guideline limits in the last year.

    Other Contaminants Detected

    The following contaminants have been detected, but not exceeded the guideline limits in the last year.

    Aluminum

    Avg:0.015 ppm
    Limit:-

    Arsenic

    Avg:1.000 ppb
    Limit:10.000 ppb

    Barium

    Avg:0.051 ppm
    Limit:2.000 ppm

    Chloride

    Avg:22.000 ppm
    Limit:-

    Chromium

    Avg:0.001 ppm
    Limit:0.100 ppm

    Copper

    Avg:0.298 ppm
    Limit:1.300 ppm
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    Contaminants tested