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Is National City, CA tap water safe?

2 utilities serve National City, 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

Neither of the 2 utilities serving National City has a result above a legal limit or action level, or a health-based violation since 2016, in EPA’s and California’s records.

Sweetwater Authority, which serves the most people here, has 2 results above EPA’s new limit, which takes effect in 2029 and 2 results above the health goal. The worst: PFOA at 11.4 ppt, above EPA’s new limit, which takes effect in 2029.

The water from Sweetwater Authority is very hard on average, 193 mg/L (11.3 grains per gallon), ranging from 76 to 340 mg/L. 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 National City’s ZIP codes, from EPA’s estimates.

What handles it

Each of these is certified, on a certifier’s listing, for a result above a line in Sweetwater Authority’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 National City

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 National City, in a straight line. Call first: certification is test by test, and not every lab takes samples from homeowners.

  • Metropolitan Solutions

    National City, CA · about 1 mile

    Certified for bacteria

    (619) 831-8100

  • Environmental Laboratory Network, Inc.

    San Diego, CA · about 6 miles

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

    (858) 266-1666

  • San Diego County Public Health Laboratory

    San Diego, CA · about 8 miles

    Certified for bacteria

    (619) 203-2009

All 145 certified labs for California

ZIP codes in National City

Which ZIP codes are in National City: 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 National City

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

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