Mitchellville 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: 2,515 people
Connections: 658
Water source: Groundwater
Based in: Mitchellville, IA
County: Polk
Owner: Local government

The ZIP code it serves

50169

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. 1 health-based violation since 2016.

What was found

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

Below EPA’s limits5

Total trihalomethanes (TTHM)

Forms or is added in treatment

Below EPA’s limits

38.8ppb

Highest yearly average, 2020 to 2026

2026, one sample: 16.1 ppb

Averaged by year, the highest was 38.8 ppb, in 2020, below EPA’s legal limit of 80 ppb. In 2026, the latest year on file, its one sample was 16.1 ppb. Earlier, from 2012 to 2019, EPA’s file shows a highest yearly average of 38.5 ppb, in 2016.

What handles it

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

Haloacetic acids (HAA5)

Forms or is added in treatment

Below EPA’s limits

25.3ppb

Highest yearly average, 2020 to 2026

2026, one sample: 15.9 ppb

Averaged by year, the highest was 25.3 ppb, in 2020, below EPA’s legal limit of 60 ppb. In 2026, the latest year on file, its one sample was 15.9 ppb. Earlier, from 2012 to 2019, EPA’s file shows a highest yearly average of 28.6 ppb, in 2018.

What handles it

No certification claim covers this compound yet.

Nitrate

Comes from the source

Below EPA’s limits

2.7ppm

Highest sample; found in 8 of 8

2026, one sample: 2.6 ppm

The highest sample, in 2025, was 2.7 ppm, below EPA’s legal limit of 10 ppm. In 2026, the latest year on file, its one sample was 2.6 ppm. Earlier, from 2012 to 2019, EPA’s file shows a highest sample of 2.2 ppm, in 2015.

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

0.83ppm

Highest yearly average, 2020 to 2026

Averaged by year, the highest was 0.83 ppm, in 2026, below EPA’s legal limit of 4.0 ppm. Its highest single sample was 2.2 ppm. That was also the latest year on file. Earlier, from 2012 to 2019, EPA’s file shows a highest yearly average of 1.6 ppm, in 2016.

What handles it

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

Chromium (total)

Comes from the source

Below EPA’s limits

1.6ppb

Highest yearly average, 2025

Averaged by year, the highest was 1.6 ppb, in 2025, below EPA’s legal limit of 100 ppb. That is the only year on file.

What handles it

NSF/ANSI 58 look for “Chromium (Hexavalent) Reduction”
NSF/ANSI 53 look for “Chromium Reduction”

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

Arsenic
Lead

Violations since 2016

Contaminant or rule	Type	Period	Measured	Status
Stage 1 Disinfectants and Disinfection Byproducts Rule	Treatment was not run by a certified operator as required.EPA: Treatment Technique No Certif. Operator	Dec. 1, 2022	—	Resolved
Health-based violations only. Resolved and archived mean the utility returned to compliance or the state closed the record. 5 monitoring or reporting violations not shown.

What this report can’t tell you

Everything else. Total trihalomethanes (TTHM), haloacetic acids (HAA5), nitrate, fluoride, chromium (total) and arsenic results here are Iowa’s own from 2020 on, with EPA’s national file for 2012 to 2019. Mitchellville Water Supply’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. 15, 2020 to Sept. 8, 2026.

Testing your own tap

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

State Hygienic Laboratory - Ankeny
Ankeny, IA · about 15 miles
Certified for bacteria, nitrate, lead and copper, metals, minerals and other inorganics
(515) 725-1600
Microbac Laboratories - Newton
Newton, IA · about 17 miles
Certified for bacteria, nitrate, lead and copper, metals, minerals and other inorganics, organic chemicals, disinfection byproducts
(641) 792-8451
AgSource
Ellsworth, IA · about 48 miles
Certified for bacteria, nitrate, metals, minerals and other inorganics
(515) 297-8103

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