Is Sweetgrass Water Users Assn Tap Water Safe? Quality Report

Water source: SWP
Ownership: Private
Counties served: Toole

Compliance record

Formal violations the EPA has on file for this supplier. A health-based violation means a contaminant limit or a required treatment was breached; the rest are monitoring or reporting failures — still violations, but not a measured health risk.

health-based violations

216

violations on file

still open

Violation	Type	Status	Period
MCL	Health-based	Resolved	2025-07-01 → 2025-09-30
MCL	Health-based	Resolved	2025-07-01 → 2025-09-30
MCL	Health-based	Resolved	2025-07-01 → 2025-09-30
MCL	Health-based	Resolved	2015-07-01 → 2015-09-30
MCL	Health-based	Resolved	2015-07-01 → 2015-09-30
MCL	Health-based	Resolved	2015-07-01 → 2015-09-30
MR	Monitoring	Archived	2026-01-01 → 2026-03-31
MR	Monitoring	Archived	2026-01-01 → 2026-03-31
MR	Monitoring	Archived	2026-01-01 → 2026-03-31
MR	Monitoring	Archived	2026-01-01 → 2026-03-31

Other contaminants detected

Each bar shows the measured level as a share of the EPA limit: green is well under, amber is close to it, red is over. For lead and copper the limit applies to exactly the 90th-percentile figure shown, so red there means a real exceedance. For everything else the limit applies to a running annual average while the figure is the 95th percentile of this system's samples — over 100% is worth reading, but is not by itself a violation. Where a single sample came in higher than that percentile, it is noted under the bar. Formal violations are listed separately.

Contaminant	Level vs EPA limit	Detection rate	Source	Period
Copper	1465 µg/L 113% of the EPA limit, at the 95th percentile of samples — 1300 µg/L worst single sample: 2320 µg/L	36/36	SYR4	2012–2018
Lead	23.5 µg/L 157% of the EPA limit, at the 95th percentile of samples — 15 µg/L worst single sample: 41 µg/L	26/36	SYR4	2012–2018
Lead	0.0150 mg/L 100% of the EPA limit 0.0150 mg/L	22/22	LCR	2018
Chloroform	89.8 µg/L No EPA limit set worst single sample: 97 µg/L	17/18	SYR4	2014–2019
Dichloroacetic Acid	20.9 µg/L No EPA limit set worst single sample: 21.7 µg/L	17/17	SYR4	2014–2019
TTHM	97.8 µg/L 122% of the EPA limit, at the 95th percentile of samples — 80 µg/L worst single sample: 101 µg/L	17/18	SYR4	2014–2019
Total Haloacetic Acids (HAA5)	40.82 µg/L 68% of the EPA limit 60 µg/L worst single sample: 42.1 µg/L	17/17	SYR4	2014–2019
Trichloroacetic Acid	18.88 µg/L No EPA limit set worst single sample: 20 µg/L	17/17	SYR4	2014–2019
Bromodichloromethane	12.2 µg/L No EPA limit set worst single sample: 12.8 µg/L	16/18	SYR4	2014–2019
Dibromochloromethane	2.19 µg/L No EPA limit set worst single sample: 2.73 µg/L	16/18	SYR4	2014–2019
Monochloroacetic Acid	2.315 µg/L No EPA limit set worst single sample: 2.57 µg/L	11/17	SYR4	2014–2019
Bromoform	0.9370 µg/L No EPA limit set worst single sample: 0.9500 µg/L	3/18	SYR4	2014–2019
Dibromoacetic Acid	0.6825 µg/L No EPA limit set worst single sample: 0.6900 µg/L	2/17	SYR4	2014–2019
Monobromoacetic Acid	0.1500 µg/L No EPA limit set	1/17	SYR4	2014–2019

Utility contact

Contact: ROARK, BRENDA
Phone: 406-335-4150

Frequently asked questions about Sweetgrass Water Users Assn

Is Sweetgrass Water Users Assn tap water safe to drink?

EPA monitoring detected 14 contaminants in Sweetgrass Water Users Assn's water. A detection isn't the same as a violation — most levels are within federal limits. See each level and source above, and the utility's annual Consumer Confidence Report for its official compliance status.

What contaminants were detected in Sweetgrass Water Users Assn's water?

EPA monitoring detected Copper, Lead, Lead, Chloroform, Dichloroacetic Acid, and others. The full list with the level and data source for each is above.

How many people does Sweetgrass Water Users Assn serve?

Sweetgrass Water Users Assn reports serving 100 people in Montana, per its EPA record.

Has Sweetgrass Water Users Assn had any water quality violations?

The EPA has 216 violations on file for Sweetgrass Water Users Assn, of which 6 are health-based (a contaminant limit or required treatment was breached) and 2 remain open. The rest are monitoring or reporting failures.

Where does this data come from?

Every figure is official EPA drinking-water monitoring — the Lead & Copper Rule, the UCMR-5 nationwide testing program, and the EPA Six-Year Review — not our own testing. Each number is labelled with its source and period.