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Is Stockton, CA tap water safe?

15 utilities serve Stockton, by EPA’s records. Here is what EPA’s and California’s records show for each, against the legal limits and the stricter health goals.

Matched to your utility using EPA records.

The short answer

2 of the 15 utilities serving Stockton have a result above a legal limit or action level, or a health-based violation since 2016, in EPA’s and California’s records: City of Stockton and Morada Manor Water System.

California Water Service - Stockton, which serves the most people here, has 1 result above EPA’s new limit, which takes effect in 2029 and 2 results above the health goal. The worst: PFOS at 5.2 ppt, above EPA’s new limit, which takes effect in 2029.

The water from California Water Service - Stockton is soft to very hard depending on the source, 47 to 380 mg/L (2.7 to 22.2 grains per gallon). How California’s water compares.

A town can be served by more than one utility, and some homes are on private wells. The name on your water bill tells you which is yours, and your ZIP code narrows it down. They are listed by how many people each serves in Stockton’s ZIP codes, from EPA’s estimates.

5 more utilities in Stockton

By EPA’s estimate, each serves fewer people in Stockton than those above.

  • San Juan Vistaserves 201 people · under 100 in Stockton · no health-based violations since 2016
  • Morada Manor Water Systemserves 112 people · under 100 in Stockton · 1 health-based violation since 2016
  • Shaded Terrace PWSserves 238 people · under 100 in Stockton · no health-based violations since 2016
  • Morada Acres Water Systemserves 105 people · under 100 in Stockton · no health-based violations since 2016
  • Gayla Manor PWSserves 178 people · under 100 in Stockton · no health-based violations since 2016

What handles it

Each of these is certified, on a certifier’s listing, for a result above a line in California Water Service - Stockton’s water, which serves the most people here. Another utility’s report names what handles its own results.

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Every claim, and more filters, in the full report

Water testing near Stockton

A utility tests the water it sends out. A test of your own tap shows what your pipes add, and on a private well it is the only test there is. It takes a lab California certifies.

The 3 labs California certifies closest to Stockton, in a straight line. Call first: certification is test by test, and not every lab takes samples from homeowners.

  • Precision Enviro-Tech

    Stockton, CA · about 2 miles

    Certified for bacteria, nitrate, lead and copper, metals, minerals and other inorganics

    (209) 405-0601

  • San Joaquin County Public Health Laboratory

    Stockton, CA · about 4 miles

    Certified for bacteria

    (209) 468-3460

  • Fruit Growers Laboratory, Inc.

    Stockton, CA · about 7 miles

    Certified for bacteria

    (209) 942-0182

All 145 certified labs for California

ZIP codes in Stockton

Which ZIP codes are in Stockton: Census 2020 relationship files. Which utilities serve them, and how many people: EPA SDWIS and EPA’s service area map. Each utility’s results: EPA UCMR 5, EPA SDWIS, and EPA’s and the state’s compliance monitoring, as its report lists them. How they are measured: methodology. Certified labs: California State Water Resources Control Board, ELAP accredited laboratories and their fields of accreditation; distances from the Census 2020 ZIP code tabulation area gazetteer.

Near Stockton

Other towns in San Joaquin County with a page of their own.

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