Is Big Sky Colony Cut Bank Tap Water Safe? Quality Report

Water source: Ground water
Ownership: Private
Counties served: Glacier

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

1,148

violations on file

still open

Violation	Type	Status	Period
MR	Monitoring	Resolved	2023-10-01
MR	Monitoring	Resolved	2023-10-01
MR	Monitoring	Resolved	2023-10-01
MR	Monitoring	Resolved	2020-05-01 → 2020-05-31
MR	Monitoring	Resolved	2020-05-01 → 2020-05-31
MR	Monitoring	Resolved	2020-05-01 → 2020-05-31
MR	Monitoring	Resolved	2020-05-01 → 2020-05-31
MR	Monitoring	Resolved	2020-01-01 → 2022-12-31
MR	Monitoring	Resolved	2020-01-01 → 2022-12-31
MR	Monitoring	Resolved	2020-01-01 → 2022-12-31

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
Nitrate-Nitrite	8140 µg/L 81% of the EPA limit 10000 µg/L worst single sample: 11000 µg/L	58/58	SYR4	2012–2019
Lead	0.0 mg/L 0% of the EPA limit 0.0150 mg/L	8/8	LCR	2026
Copper	8.25 µg/L 0.6% of the EPA limit 1300 µg/L worst single sample: 9 µg/L	6/16	SYR4	2013–2016
Bromodichloromethane	4.32 µg/L No EPA limit set worst single sample: 4.7 µg/L	5/12	SYR4	2013–2019
Bromoform	3.5 µg/L No EPA limit set worst single sample: 3.6 µg/L	5/12	SYR4	2013–2019
Dibromochloromethane	4.72 µg/L No EPA limit set worst single sample: 5 µg/L	5/12	SYR4	2013–2019
TTHM	13.02 µg/L 16% of the EPA limit 80 µg/L worst single sample: 14 µg/L	5/12	SYR4	2013–2019
Xylenes, Total	7.455 µg/L 0.1% of the EPA limit 10000 µg/L worst single sample: 7.8 µg/L	4/7	SYR4	2013–2016
Chloroform	2.82 µg/L No EPA limit set worst single sample: 2.9 µg/L	2/12	SYR4	2013–2019
Dibromoacetic Acid	2.395 µg/L No EPA limit set worst single sample: 2.4 µg/L	2/5	SYR4	2014–2019
Ethylbenzene	0.8885 µg/L 0.1% of the EPA limit 700 µg/L worst single sample: 0.9000 µg/L	2/7	SYR4	2013–2016
Total Haloacetic Acids (HAA5)	4.58 µg/L 7.6% of the EPA limit 60 µg/L worst single sample: 4.7 µg/L	2/5	SYR4	2014–2019
Dichloroacetic Acid	1.8 µg/L No EPA limit set	1/5	SYR4	2014–2019
Trichloroacetic Acid	0.5500 µg/L No EPA limit set	1/5	SYR4	2014–2019

46 contaminants tested, none detected

1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-Dichloroethane1,2-Dichloropropane2,4,5-TP2,4-DArsenicAtrazineBhc-GammaBenzeneBenzo(A)PyreneChlorobenzeneCarbofuranCarbon TetrachlorideChlordaneDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDinosebEndrinHexachlorobenzeneHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoLeadMethoxychlorMonobromoacetic AcidMonochloroacetic AcidOxamylPentachlorophenolPicloramSimazineStyreneTetrachloroethyleneTolueneToxapheneTrichloroethyleneVinyl Chloridecis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact: KLEINSASSER, KENNETH E
Phone: 406-229-0340

Frequently asked questions about Big Sky Colony Cut Bank

Is Big Sky Colony Cut Bank tap water safe to drink?

EPA monitoring detected 14 contaminants in Big Sky Colony Cut Bank'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 Big Sky Colony Cut Bank's water?

EPA monitoring detected Nitrate-Nitrite, Lead, Copper, Bromodichloromethane, Bromoform, and others. The full list with the level and data source for each is above.

How many people does Big Sky Colony Cut Bank serve?

Big Sky Colony Cut Bank reports serving 107 people in Montana, per its EPA record.

Has Big Sky Colony Cut Bank had any water quality violations?

The EPA has 1148 violations on file for Big Sky Colony Cut Bank, of which 0 are health-based (a contaminant limit or required treatment was breached) and 0 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.