Bitterroot Gateway Mb Pk Lolo

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: 130 people
Connections: 53
Water source: Groundwater
Based in: Lolo, MT
County: Missoula
Owner: Private

The ZIP code it serves

59847

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

Fluoride, nitrate, arsenic, chromium (total) and total trihalomethanes (TTHM): Montana’s own results, samples taken from Oct. 3, 2022 to Feb. 11, 2026, with EPA’s 2012 to 2019 file for earlier years.

Below EPA’s limits2

Fluoride

Forms or is added in treatment

Below EPA’s limits

0.12ppm

Highest yearly average, 2022 to 2026

Averaged by year, the highest was 0.12 ppm, in 2026, below EPA’s legal limit of 4.0 ppm. Its highest single sample was 0.12 ppm. That was also the latest year on file. Earlier, from 2012 to 2019, EPA’s file shows a highest yearly average of 0.1 ppm, in 2013.

What handles it

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

Nitrate

Comes from the source

Below EPA’s limits

0.24ppm

Highest sample; found in 2 of 2

2026 average: 0.23 ppm

The highest sample, in 2026, was 0.24 ppm, below EPA’s legal limit of 10 ppm. That is the only year on file, and its two samples averaged 0.23 ppm. Earlier, from 2012 to 2019, EPA’s file shows a highest sample of 0.35 ppm, in 2018.

What handles it

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

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

Arsenic
Chromium (total)
Lead
Total trihalomethanes (TTHM)

Violations since 2016

No health-based violations on file with EPA since 2016. There are 113 monitoring or reporting violations: a sample missed, late or not reported.

What this report can’t tell you

Everything else. Fluoride, nitrate, arsenic, chromium (total) and total trihalomethanes (TTHM) results here are Montana’s own from 2022 on, with EPA’s national file for 2012 to 2019. Bitterroot Gateway Mb Pk Lolo’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 Oct. 3, 2022 to Feb. 11, 2026.

Testing your own tap

Bitterroot Gateway Mb Pk Lolo’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.

The 3 labs Montana certifies closest to the area Bitterroot Gateway Mb Pk Lolo serves, in a straight line. Call first: certification is test by test, and not every lab takes samples from homeowners.

Water Technologies Laboratory
Missoula, MT · about 24 miles
Certified for bacteria
(406) 549-8868
RD Water Lab, LLC
Missoula, MT · about 25 miles
Certified for bacteria
(406) 721-8179
Missoula CCHD Water Lab
Missoula, MT · about 29 miles
Certified for bacteria
(406) 523-4755

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