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Tripoli Water Supply

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
1,191 people
Connections
581
Water source
Groundwater
Based in
Tripoli, IA
County
Bremer
Owner
Local government
The ZIP code it serves

50676

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

Copper: EPA’s file records a utility’s copper only when it exceeds the action level. The last here was 2.1 ppm, for the period ending Dec. 31, 2004. None since is on file, so it is not counted as a current finding.

Haloacetic acids (HAA5), total trihalomethanes (TTHM), nitrate, fluoride, arsenic and chromium (total): Iowa’s own results, samples taken from July 8, 2020 to July 15, 2026, with EPA’s 2012 to 2019 file for earlier years.

Uranium: EPA’s compliance monitoring file, samples taken from July 2, 2014 to July 2, 2014. Newer results are in the utility’s annual water quality report.

Below EPA’s limits4

Haloacetic acids (HAA5)

Forms or is added in treatment

Below EPA’s limits

45.3ppb

Highest yearly average, 2020 to 2026

Averaged by year, the highest was 45.3 ppb, in 2026, below EPA’s legal limit of 60 ppb. Its highest single sample was 60.9 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 45.9 ppb, in 2017.

What handles it

No certification claim covers this compound yet.

Total trihalomethanes (TTHM)

Forms or is added in treatment

Below EPA’s limits

56.5ppb

Highest yearly average, 2020 to 2026

2026 average: 39.4 ppb

Averaged by year, the highest was 56.5 ppb, in 2020, below EPA’s legal limit of 80 ppb. Its highest single sample was 74.5 ppb. In 2026, the latest year on file, its two samples averaged 39.4 ppb. Earlier, from 2012 to 2019, EPA’s file shows a highest yearly average of 54.1 ppb, in 2018.

What handles it

  • NSF/ANSI 53 look for “Trihalomethanes (TTHM) Reduction”
  • NSF/ANSI 58 look for “Trihalomethanes (TTHM) Reduction”

Nitrate

Comes from the source

Below EPA’s limits

1.1ppm

Highest sample; found in 14 of 14

2026 average: 0.8 ppm

The highest sample, in 2020, was 1.1 ppm, below EPA’s legal limit of 10 ppm. In 2026, the latest year on file, its two samples averaged 0.8 ppm. Earlier, from 2012 to 2019, EPA’s file shows a highest sample of 1.0 ppm, in 2019.

What handles it

  • NSF/ANSI 58 look for “Nitrate/Nitrite Reduction”
  • NSF/ANSI 53 look for “Nitrate/Nitrite (30 ppm challenge)”

Fluoride

Forms or is added in treatment

Below EPA’s limits

0.3ppm

Highest yearly average, 2021 to 2022

2022, one sample: 0.3 ppm

Averaged by year, the highest was 0.3 ppm, in 2021, below EPA’s legal limit of 4.0 ppm. In 2022, the latest year on file, its one sample was 0.3 ppm. Earlier, from 2012 to 2019, EPA’s file shows a highest yearly average of 0.4 ppm, in 2012.

What handles it

4 compounds tested and not foundBelow the reporting level in every sample. Not found is not the same as zero.
  • Arsenic
  • Chromium (total)
  • Lead
  • Uranium

Violations since 2016

No health-based violations on file with EPA since 2016.

What this report can’t tell you

  • Everything else. Haloacetic acids (HAA5), total trihalomethanes (TTHM), nitrate, fluoride, arsenic and chromium (total) results here are Iowa’s own from 2020 on, with EPA’s national file for 2012 to 2019. Uranium comes from EPA’s file alone, which ends in 2019. Tripoli Water Supply’s own annual report, which it must send you every year, has newer results for those and 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 July 8, 2020 to July 15, 2026; EPA’s compliance samples are from July 2, 2014 to July 2, 2014.

Testing your own tap

Tripoli Water Supply’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 Tripoli Water Supply serves, 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 21 miles

    Certified for bacteria, nitrate, minerals and other inorganics

    (319) 277-2401

  • Microbac Laboratories - Waterloo

    Waterloo, IA · about 27 miles

    Certified for bacteria, nitrate

    (319) 235-4440

  • Linn County Public Health Department

    Cedar Rapids, IA · about 65 miles

    Certified for bacteria, nitrate

    (319) 892-6000

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 IA0975032. Rebuilt from EPA data on Oct. 18, 2026.

Also in Bremer County

All Iowa utilities

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