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Is Yankton, SD tap water safe?

2 utilities serve Yankton, by EPA’s records. Here is what EPA’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 2 utilities serving Yankton have a result above a legal limit or action level, or a health-based violation since 2016, in EPA’s records: By Water District and Yankton.

By Water District, which serves the most people here, has 2 results above the health goal and 1 result above EPA’s health benchmark. The worst: Lithium at 52 ppb, above EPA’s health benchmark. Health goals are stricter than legal limits and are not enforced.

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 Yankton’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 By Water District’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 Yankton

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 South Dakota certifies.

The 2 labs South Dakota certifies closest to Yankton, in a straight line. Call first: certification is test by test, and not every lab takes samples from homeowners.

  • Sioux Falls Public Health Laboratory

    Sioux Falls, SD · about 60 miles

    Certified for bacteria

    (605) 367-8777

  • American Engineering Testing

    Sioux Falls, SD · about 60 miles

    Certified for bacteria

    (605) 332-5371

South Dakota Public Health Laboratory: Sample bottles for testing a private well for bacteria and nitrate, lead, or a new-well panel, ordered online from the lab or picked up at a County Extension office. Instructions and fees come with the bottles. Test a Private Well, South Dakota Department of Health.

All 16 certified labs for South Dakota

ZIP codes in Yankton

Which ZIP codes are in Yankton: 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: South Dakota DANR, laboratories certified for the analysis of drinking water; distances from the Census 2020 ZIP code tabulation area gazetteer.

Near Yankton

Towns nearby with a page of their own.

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