Lenwood Utilities

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: 238 people
Connections: 95
Water source: Groundwater
Based in: Dunkerton, IA
County: Black Hawk
Owner: Private

The ZIP code it serves

50626

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 1.5 ppm, for the period ending Dec. 31, 1993. None since is on file, so it is not counted as a current finding.

Nitrate: Iowa’s own results, samples taken from Jan. 6, 2020 to Jan. 6, 2026.

Fluoride, arsenic and chromium (total): EPA’s compliance monitoring file, samples taken from June 5, 2019 to June 5, 2019. Newer results are in the utility’s annual water quality report.

Below EPA’s limits1

Fluoride

Forms or is added in treatment

Below EPA’s limits

0.55ppm

Highest yearly average, 2019

Averaged by year, the highest was 0.55 ppm, in 2019, below EPA’s legal limit of 4.0 ppm. Its highest single sample was 0.7 ppm. That is the only year on file.

What handles it

NSF/ANSI 58 look for “Fluoride Reduction”
NSF/ANSI 53 look for “Fluoride”

4 compounds tested and not foundBelow the reporting level in every sample. Not found is not the same as zero.

Arsenic
Chromium (total)
Lead
Nitrate

Violations since 2016

No health-based violations on file with EPA since 2016. There are 2 monitoring or reporting violations: a sample missed, late or not reported.

What this report can’t tell you

Everything else. Nitrate results here are Iowa’s own from 2020 on, with EPA’s national file for 2012 to 2019. Fluoride, arsenic and chromium (total) come from EPA’s file alone, which ends in 2019. Lenwood Utilities’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 Jan. 6, 2020 to Jan. 6, 2026; EPA’s compliance samples are from June 5, 2019 to June 5, 2019.

Testing your own tap

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

Microbac Laboratories - Waterloo
Waterloo, IA · about 14 miles
Certified for bacteria, nitrate
(319) 235-4440
Eurofins - Cedar Falls
Cedar Falls, IA · about 16 miles
Certified for bacteria, nitrate, minerals and other inorganics
(319) 277-2401
Linn County Public Health Department
Cedar Rapids, IA · about 50 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