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Is Mason City, IA tap water safe?

Mason City Water Department serves Mason City, by EPA’s records. Here is what EPA’s and Iowa’s records show for it, against the legal limits and the stricter health goals.

Matched to your utility using EPA records.

The short answer

Mason City Water Department serves Mason City. In EPA’s and Iowa’s records it has 1 result above the health goal and 1 result above EPA’s health benchmark, and no health-based violation since 2016.

The worst: Lithium at 92 ppb, above EPA’s health benchmark. Health goals are stricter than legal limits and are not enforced.

Some homes in a town are on private wells or a small system of their own. The name on your water bill tells you which is yours.

What handles it

Each of these is certified, on a certifier’s listing, for a result above a line in Mason City Water Department’s water.

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Every claim, and more filters, in the full report

Water testing near Mason 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 Iowa certifies.

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

  • Eurofins - Cedar Falls

    Cedar Falls, IA · about 56 miles

    Certified for bacteria, nitrate, minerals and other inorganics

    (319) 277-2401

  • AgSource

    Ellsworth, IA · about 59 miles

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

    (515) 297-8103

  • Microbac Laboratories - Waterloo

    Waterloo, IA · about 67 miles

    Certified for bacteria, nitrate

    (319) 235-4440

State Hygienic Laboratory at the University of Iowa: Through the Grants-to-Counties program, private well owners in participating counties can have their water tested for total coliform bacteria and nitrate. Start with the county sanitarian at your county health department. No cost in a participating county. The Grants-to-Counties Program, State Hygienic Lab at the University of Iowa.

All 36 certified labs for Iowa

ZIP codes in Mason City

Which ZIP codes are in Mason 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: Iowa DNR, laboratories certified for drinking water; distances from the Census 2020 ZIP code tabulation area gazetteer.

Near Mason City

Towns nearby with a page of their own.

What to do next