Is Pryor Water Tap Water Safe? Quality Report

Water source: Ground water
Ownership: Native American

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

236

violations on file

still open

Violation	Type	Status	Period
TT	Health-based	Unaddressed	2025-10-10
TT	Health-based	Resolved	2020-11-28
TT	Health-based	Addressed	2018-11-02
MCL	Health-based	Resolved	2007-06-01 → 2007-06-30
MCL	Health-based	Resolved	2007-06-01 → 2007-06-30
MCL	Health-based	Resolved	2007-06-01 → 2007-06-30
MCL	Health-based	Resolved	2007-06-01 → 2007-06-30
MCL	Health-based	Resolved	2004-09-01 → 2004-09-30
MCL	Health-based	Resolved	2004-09-01 → 2004-09-30
MCL	Health-based	Resolved	2004-09-01 → 2004-09-30

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
Nitrate-Nitrite	2873.5 µg/L 29% of the EPA limit 10000 µg/L worst single sample: 2920 µg/L	24/24	SYR4	2012–2019
Copper	275 µg/L 21% of the EPA limit 1300 µg/L worst single sample: 374 µg/L	10/12	SYR4	2014–2017
Lead	0.0 mg/L 0% of the EPA limit 0.0150 mg/L	9/9	LCR	2025
TTHM	36.6 µg/L 46% of the EPA limit 80 µg/L worst single sample: 42 µg/L	5/9	SYR4	2014–2019
Total Haloacetic Acids (HAA5)	39.4 µg/L 66% of the EPA limit 60 µg/L worst single sample: 45 µg/L	5/5	SYR4	2014–2017
Lead	2.85 µg/L 19% of the EPA limit 15 µg/L worst single sample: 3 µg/L	4/12	SYR4	2014–2017
Bromodichloromethane	6.63 µg/L No EPA limit set worst single sample: 7 µg/L	3/8	SYR4	2014–2019
Combined Uranium	2.02 µg/L 6.7% of the EPA limit 30 µg/L worst single sample: 2.1 µg/L	3/3	SYR4	2016–2019
Dibromoacetic Acid	0.8500 µg/L No EPA limit set worst single sample: 0.9000 µg/L	3/4	SYR4	2014–2017
Chloroform	32.85 µg/L No EPA limit set worst single sample: 34 µg/L	2/8	SYR4	2014–2019
Combined Radium (-226 And -228)	2.07 pCi/L 41% of the EPA limit 5 pCi/L worst single sample: 2.1 pCi/L	2/3	SYR4	2016–2019
Dibromochloromethane	1.295 µg/L No EPA limit set worst single sample: 1.3 µg/L	2/8	SYR4	2014–2019
Dichloroacetic Acid	17.54 µg/L No EPA limit set worst single sample: 18 µg/L	2/4	SYR4	2014–2017
Fluoride	300 µg/L 7.5% of the EPA limit 4000 µg/L	2/2	SYR4	2019
Trichloroacetic Acid	24.14 µg/L No EPA limit set worst single sample: 25 µg/L	2/4	SYR4	2014–2017
Bromoform	1 µg/L No EPA limit set	1/8	SYR4	2014–2019
Gross Alpha, Excl. Radon And U	3.6 pCi/L 24% of the EPA limit 15 pCi/L	1/3	SYR4	2016–2019
Monobromoacetic Acid	0.5400 µg/L No EPA limit set	1/4	SYR4	2014–2017
Monochloroacetic Acid	1.3 µg/L No EPA limit set	1/4	SYR4	2014–2017
Selenium	1 µg/L 2% of the EPA limit 50 µg/L	1/2	SYR4	2019

61 contaminants tested, none detected

1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-DIBROMO-3-CHLOROPROPANE1,2-Dichloroethane1,2-Dichloropropane2,4,5-TP2,4-DAntimony, TotalArsenicAtrazineBhc-GammaBariumBenzeneBenzo(A)PyreneBeryllium, TotalChlorobenzeneCyanideCadmiumCarbofuranCarbon TetrachlorideChlordaneChromiumDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDinosebDiquatEthylene DibromideEndothallEndrinEthylbenzeneGlyphosateGross Beta Particle ActivityHexachlorobenzeneHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorNitriteOxamylPentachlorophenolPicloramSimazineStyreneTetrachloroethyleneThallium, TotalTolueneTotal Polychlorinated Biphenyls (PCB)ToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact: STOPS, JR., MARVIN (WES)
Phone: 406-697-4765
Email: [email protected]

Frequently asked questions about Pryor Water

Is Pryor Water tap water safe to drink?

EPA monitoring detected 20 contaminants in Pryor Water'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 Pryor Water's water?

EPA monitoring detected Nitrate-Nitrite, Copper, Lead, TTHM, Total Haloacetic Acids (HAA5), and others. The full list with the level and data source for each is above.

How many people does Pryor Water serve?

Pryor Water reports serving 406 people in Montana, per its EPA record.

Has Pryor Water had any water quality violations?

The EPA has 236 violations on file for Pryor Water, of which 18 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.