Is Columbus Town of Tap Water Safe? Quality Report

Water source: Ground water
Ownership: Local government
Counties served: Stillwater

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

186

violations on file

still open

Violation	Type	Status	Period
Other	Monitoring	Resolved	2018-07-01
Other	Monitoring	Resolved	2018-07-01
MON	Monitoring	Resolved	2018-07-01 → 2018-07-31
MON	Monitoring	Resolved	2018-07-01 → 2018-07-31
MON	Monitoring	Resolved	2018-07-01 → 2018-07-31
MON	Monitoring	Resolved	2018-07-01 → 2018-07-31
MR	Monitoring	Resolved	2015-01-01 → 2015-12-31
MR	Monitoring	Resolved	2015-01-01 → 2015-12-31
MR	Monitoring	Resolved	2015-01-01 → 2015-12-31
MR	Monitoring	Resolved	2015-01-01 → 2015-12-31

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	3530 µg/L 35% of the EPA limit 10000 µg/L worst single sample: 4340 µg/L	48/48	SYR4	2012–2019
Copper	427.1 µg/L 33% of the EPA limit 1300 µg/L worst single sample: 467 µg/L	20/20	SYR4	2014–2017
Lead	6.4 µg/L 43% of the EPA limit 15 µg/L worst single sample: 9 µg/L	14/20	SYR4	2014–2017
Arsenic	8.45 µg/L 85% of the EPA limit 10 µg/L worst single sample: 9 µg/L	12/15	SYR4	2013–2019
Lead	0.0040 mg/L 27% of the EPA limit 0.0150 mg/L	12/12	LCR	2017
Dibromochloromethane	7.3 µg/L No EPA limit set worst single sample: 7.4 µg/L	11/20	SYR4	2013–2019
TTHM	17 µg/L 21% of the EPA limit 80 µg/L	11/20	SYR4	2013–2019
Bromoform	5.785 µg/L No EPA limit set worst single sample: 6.1 µg/L	10/20	SYR4	2013–2019
Fluoride	500 µg/L 13% of the EPA limit 4000 µg/L	9/9	SYR4	2013–2019
Selenium	5.6 µg/L 11% of the EPA limit 50 µg/L worst single sample: 6 µg/L	9/9	SYR4	2013–2019
Bromodichloromethane	3.35 µg/L No EPA limit set worst single sample: 3.5 µg/L	7/20	SYR4	2013–2019
Barium	90 µg/L 4.5% of the EPA limit 2000 µg/L	6/9	SYR4	2013–2019
Dibromoacetic Acid	2.825 µg/L No EPA limit set worst single sample: 3 µg/L	6/8	SYR4	2013–2019
Total Haloacetic Acids (HAA5)	5.15 µg/L 8.6% of the EPA limit 60 µg/L worst single sample: 5.7 µg/L	6/8	SYR4	2013–2019
Chloroform	3.72 µg/L No EPA limit set worst single sample: 4.1 µg/L	5/20	SYR4	2013–2019
Gross Alpha, Excl. Radon And U	8.636 pCi/L 58% of the EPA limit 15 pCi/L worst single sample: 9 pCi/L	3/6	SYR4	2012–2019
Combined Uranium	5.99 µg/L 20% of the EPA limit 30 µg/L worst single sample: 6 µg/L	2/2	SYR4	2016–2019
Chromium	5 µg/L 5% of the EPA limit 100 µg/L	1/9	SYR4	2013–2019
Dichloroacetic Acid	3.3 µg/L No EPA limit set	1/8	SYR4	2013–2019
Monobromoacetic Acid	0.5300 µg/L No EPA limit set	1/8	SYR4	2013–2019

52 contaminants tested, none detected

1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-Dichloroethane1,2-Dichloropropane2,4,5-TP2,4-DAntimony, TotalAtrazineBhc-GammaBenzeneBenzo(A)PyreneBeryllium, TotalChlorobenzeneCadmiumCarbofuranCarbon TetrachlorideChlordaneCombined Radium (-226 And -228)DichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDinosebEndrinEthylbenzeneHexachlorobenzeneHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorMonochloroacetic AcidOxamylPentachlorophenolPicloramSimazineStyreneTetrachloroethyleneThallium, TotalTolueneToxapheneTrichloroacetic AcidTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact: BROOKSHIRE, PEYTON
Phone: 406-322-4424
Email: [email protected]

Frequently asked questions about Columbus Town of

Is Columbus Town of tap water safe to drink?

EPA monitoring detected 20 contaminants in Columbus Town of'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 Columbus Town of's water?

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

How many people does Columbus Town of serve?

Columbus Town of reports serving 1,900 people in Montana, per its EPA record.

Has Columbus Town of had any water quality violations?

The EPA has 186 violations on file for Columbus Town of, 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.