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Is South Monrovia Island, CA tap water safe?

3 utilities serve South Monrovia Island, 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

None of the 3 utilities serving South Monrovia Island has a result above a legal limit or action level, or a health-based violation since 2016, in EPA’s and California’s records.

Cal - Am Water Company - Duarte, which serves the most people here, has 1 result above EPA’s new limit, which takes effect in 2029 and 3 results above the health goal. The worst: PFOS at 5.1 ppt, above EPA’s new limit, which takes effect in 2029.

The water from Cal - Am Water Company - Duarte is moderately hard to very hard depending on the source, 110 to 270 mg/L (6.4 to 15.8 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 South Monrovia Island’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 Cal - Am Water Company - Duarte’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 South Monrovia Island

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

  • Weck Laboratories, Inc.

    City of Industry, CA · about 9 miles

    Certified for bacteria, nitrate, lead and copper, metals, minerals and other inorganics, organic chemicals, disinfection byproducts, PFAS, radioactivity

    (626) 336-2139

  • EMSL Analytical, Inc. (LA Testing)

    South Pasadena, CA · about 11 miles

    Certified for bacteria, asbestos

    (323) 254-9960

  • Eurofins Pomona

    Pomona, CA · about 12 miles

    Certified for bacteria, nitrate, lead and copper, metals, minerals and other inorganics, organic chemicals, disinfection byproducts, PFAS, radioactivity

    (626) 386-1100

All 145 certified labs for California

ZIP codes in South Monrovia Island

Which ZIP codes are in South Monrovia Island: 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 South Monrovia Island

Other towns in Los Angeles County with a page of their own.

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