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Is Kaukauna, WI tap water safe?

5 utilities serve Kaukauna, 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

2 of the 5 utilities serving Kaukauna have a result above a legal limit or action level, or a health-based violation since 2016, in EPA’s and Wisconsin’s records: Little Chute Waterworks and Holland TN Sanitary Dist.

Kaukauna Utilities, which serves the most people here, has 3 results above the health goal and 1 result above EPA’s health benchmark. The worst: Lithium at 17 ppb, above EPA’s health benchmark. Health goals are stricter than legal limits and are not enforced.

The water from Kaukauna Utilities is very hard, typically 655 mg/L (38.3 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 Kaukauna’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 Kaukauna Utilities’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 Kaukauna

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

  • Farm First Dairy Cooperative

    Kaukauna, WI · under a mile

    Certified for bacteria

    (920) 731-5484

  • Outagamie County Public Health Lab

    Appleton, WI · about 7 miles

    Certified for bacteria

    (920) 832-5100

  • Branch River Testing Services LLC

    Greenleaf, WI · about 10 miles

    Certified for bacteria, nitrate, metals

    (920) 532-0016

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 Kaukauna

Which ZIP codes are in Kaukauna: 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 Kaukauna

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

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