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Keosauqua Water Works

What EPA’s and Iowa’s records show in this utility’s water: nitrate, arsenic and other regulated chemicals; lead and copper; and violations since 2016, with the certification that handles each result.

Serves
961 people
Connections
583
Water source
Surface water bought from another system
Based in
Keosauqua, IA
County
Van Buren
Owner
Local government
The ZIP code it serves

52565

The short answer

Nothing in EPA’s and Iowa’s records for this utility is above a health goal. That covers nitrate, arsenic and other regulated chemicals, plus lead and copper, not everything. No health-based violations on file since 2016.

What was found

Haloacetic acids (HAA5) and total trihalomethanes (TTHM): Iowa’s own results, samples taken from Jan. 6, 2020 to July 6, 2026, with EPA’s 2012 to 2019 file for earlier years.

Below EPA’s limits2

Haloacetic acids (HAA5)

Forms or is added in treatment

Below EPA’s limits

47.1ppb

Highest yearly average, 2020 to 2026

Averaged by year, the highest was 47.1 ppb, in 2026, below EPA’s legal limit of 60 ppb. Its highest single sample was 62.9 ppb. That was also the latest year on file. EPA recorded no violation for haloacetic acids (HAA5) at this utility since 2020. Earlier, from 2012 to 2019, EPA’s file shows a highest yearly average of 27.5 ppb, in 2015.

What handles it

No certification claim covers this compound yet.

Total trihalomethanes (TTHM)

Forms or is added in treatment

Below EPA’s limits

42.5ppb

Highest yearly average, 2020 to 2026

2026 average: 40 ppb

Averaged by year, the highest was 42.5 ppb, in 2020, below EPA’s legal limit of 80 ppb. Its highest single sample was 58.9 ppb. In 2026, the latest year on file, its three samples averaged 40 ppb. Earlier, from 2012 to 2019, EPA’s file shows a highest yearly average of 53.8 ppb, in 2015.

What handles it

  • NSF/ANSI 53 look for “Trihalomethanes (TTHM) Reduction”
  • NSF/ANSI 58 look for “Trihalomethanes (TTHM) Reduction”
One compound tested and not foundBelow the reporting level in every sample. Not found is not the same as zero.
  • Lead

Violations since 2016

No health-based violations on file with EPA since 2016. There are 3 monitoring or reporting violations: a sample missed, late or not reported.

What this report can’t tell you

  • Everything else. Haloacetic acids (HAA5) and total trihalomethanes (TTHM) results here are Iowa’s own from 2020 on, with EPA’s national file for 2012 to 2019. Keosauqua Water Works’s own annual report, which it must send you every year, has the contaminants this page does not show.

  • Your own plumbing. Lead results are the 90th percentile across homes the utility samples. Your home’s service line, solder and fixtures decide yours. A certified lab test is the only way to know.

  • What it means for your health. This page reports what the records show and EPA’s limits and goals; it is not medical advice. If you are worried about a health effect, talk to a doctor or your local health department.

  • Anything after the latest data. SDWIS data is from 2026 Q3; UCMR 5 didn’t sample this utility; Iowa’s results run from Jan. 6, 2020 to July 6, 2026.

Testing your own tap

Keosauqua Water Works’s results are for the water it sends out. What your own service line, solder and fixtures add shows up only in a test of your tap, by a lab Iowa certifies.

The 3 labs Iowa certifies closest to the area Keosauqua Water Works serves, in a straight line. Call first: certification is test by test, and not every lab takes samples from homeowners.

  • Microbac Laboratories - Centerville

    Centerville, IA · about 51 miles

    Certified for bacteria

    (641) 437-7023

  • Ion Environmental Solutions

    Muscatine, IA · about 66 miles

    Certified for bacteria, nitrate

    (563) 299-2214

  • State Hygienic Laboratory - Coralville

    Coralville, IA · about 68 miles

    Certified for bacteria, nitrate, organic chemicals, disinfection byproducts, PFAS, radioactivity

    (319) 335-4500

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

Sources

PWSID IA8938026. Rebuilt from EPA data on Oct. 18, 2026.

Also in Van Buren County

All Iowa utilities

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