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Is Twin Lakes, WI tap water safe?

13 utilities serve Twin Lakes, by EPA’s records. Here is what EPA’s and Wisconsin’s records show for each, against the legal limits and the stricter health goals.

Matched to your utility using EPA records.

The short answer

6 of the 13 utilities serving Twin Lakes have a result above a legal limit or action level, or a health-based violation since 2016, in EPA’s and Wisconsin’s records: Twin Lakes Park Water Coop, Genoa City Waterworks, Village of Bloomfield and 3 more.

Twin Lakes Complex, which serves the most people here, has 1 result above the health goal. The worst: Arsenic at 1.7 ppb, above the health goal. Health goals are stricter than legal limits and are not enforced.

The water from Twin Lakes Complex is very hard, 250 mg/L (14.6 grains per gallon). How Wisconsin’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 Twin Lakes’s ZIP codes, from EPA’s estimates.

3 more utilities in Twin Lakes

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

  • 337 - 9 Holy Hill Apartments LLCserves 30 people · lists Twin Lakes among the places it serves · no health-based violations since 2016
  • 425 Holy Hill Aptsserves 28 people · lists Twin Lakes among the places it serves · no health-based violations since 2016
  • Residences on Mainserves 26 people · lists Twin Lakes among the places it serves · 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 Twin Lakes Complex’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 Twin Lakes

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 Wisconsin certifies.

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

  • Lake Geneva Utility Commission

    Lake Geneva, WI · about 9 miles

    Certified for bacteria

    (262) 248-2311 ext. 406

  • Walworth Co. Health & Human Services

    Elkhorn, WI · about 19 miles

    Certified for bacteria, nitrate

    (262) 741-3200

  • S & R Krizan Pump Service Incorporated

    Wind Lake, WI · about 20 miles

    Certified for bacteria

    (262) 895-6454

Wisconsin State Laboratory of Hygiene: Well water test kits ordered by phone and shipped free; you pay to mail the sample back, and the lab bills you after testing. Tests run from bacteria alone to a homeowner package covering bacteria, nitrate, fluoride, metals, hardness, volatile organic compounds and atrazine. Bacteria is $35, nitrate $35, lead $38, and the homeowner package $450, as of July 1, 2026. Public Environmental and Water Testing Prices, Wisconsin State Laboratory of Hygiene.

All 156 certified labs for Wisconsin

ZIP codes in Twin Lakes

Which ZIP codes are in Twin Lakes: 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: Wisconsin DNR and DATCP, certified and approved drinking water laboratories; distances from the Census 2020 ZIP code tabulation area gazetteer.

Near Twin Lakes

Other towns in Walworth County with a page of their own.

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