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Midway Townhomes WUA

What EPA’s and Montana’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
75 people
Connections
29
Water source
Surface water bought from another system
Based in
Billings, MT
County
Yellowstone
Owner
Private

The short answer

Nothing in EPA’s and Montana’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

Total trihalomethanes (TTHM) and haloacetic acids (HAA5): Montana’s own results, samples taken from Sept. 15, 2022 to Aug. 6, 2026.

Below EPA’s limits2

Total trihalomethanes (TTHM)

Forms or is added in treatment

Below EPA’s limits

66.5ppb

Highest yearly average, 2022 to 2026

2026 average: 43 ppb

Averaged by year, the highest was 66.5 ppb, in 2025, below EPA’s legal limit of 80 ppb. Its highest single sample was 101 ppb. In 2026, the latest year on file, its three samples averaged 43 ppb. EPA recorded no violation for total trihalomethanes (TTHM) at this utility since 2020.

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

38ppb

Highest yearly average, 2022 to 2026

2026 average: 32 ppb

Averaged by year, the highest was 38 ppb, in 2023, below EPA’s legal limit of 60 ppb. Its highest single sample was 52 ppb. In 2026, the latest year on file, its three samples averaged 32 ppb.

What handles it

No certification claim covers this compound yet.

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 4 monitoring or reporting violations: a sample missed, late or not reported.

What this report can’t tell you

  • Everything else. Total trihalomethanes (TTHM) and haloacetic acids (HAA5) results here are Montana’s own from 2022 on, with EPA’s national file for 2012 to 2019. Midway Townhomes WUA’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; Montana’s results run from Sept. 15, 2022 to Aug. 6, 2026.

Testing your own tap

Midway Townhomes WUA’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 Montana certifies.

No lab Montana certifies is within 75 miles of the area Midway Townhomes WUA serves on the state’s list. Some take samples by mail; the state’s page lists them all.

Montana State Environmental Laboratory: Private well testing packages for bacteria, metals, nutrients, anions, organic chemicals and more, open to the public. Samples can be mailed, sent by the lab's free courier, or dropped off at the lab. Environmental Laboratory, Montana Department of Public Health and Human Services.

All 36 certified labs for Montana

Sources

PWSID MT0005065. Rebuilt from EPA data on Oct. 18, 2026.

Also in Yellowstone County

All Montana utilities

What to do next