Is Superior Town of Tap Water Safe? Quality Report

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

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

violations on file

still open

Violation	Type	Status	Period
MR	Monitoring	Resolved	2017-06-01 → 2017-06-30
MR	Monitoring	Resolved	2017-06-01 → 2017-06-30
MR	Monitoring	Resolved	2017-06-01 → 2017-06-30
MR	Monitoring	Resolved	2017-06-01 → 2017-06-30
MR	Monitoring	Resolved	1998-06-01 → 1998-06-30
MR	Monitoring	Resolved	1997-01-01 → 1997-12-31
MR	Monitoring	Resolved	1997-01-01 → 1997-12-31
MR	Monitoring	Resolved	1996-01-01 → 1998-12-31
MR	Monitoring	Resolved	1996-01-01 → 1998-12-31
MR	Monitoring	Resolved	1996-01-01 → 1998-12-31

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	253.5 µg/L 2.5% of the EPA limit 10000 µg/L worst single sample: 2010 µg/L	32/32	SYR4	2012–2019
Copper	71 µg/L 5.5% of the EPA limit 1300 µg/L worst single sample: 90 µg/L	20/20	SYR4	2014–2017
Nitrate	270 µg/L 2.7% of the EPA limit 10000 µg/L	12/12	SYR4	2014–2017
Chloroform	4.5 µg/L No EPA limit set worst single sample: 5.4 µg/L	10/16	SYR4	2012–2019
TTHM	6.6 µg/L 8.2% of the EPA limit 80 µg/L	10/16	SYR4	2012–2019
Barium	140 µg/L 7% of the EPA limit 2000 µg/L	9/9	SYR4	2012–2017
Fluoride	136 µg/L 3.4% of the EPA limit 4000 µg/L worst single sample: 140 µg/L	9/9	SYR4	2012–2017
Lead	0.0010 mg/L 6.7% of the EPA limit 0.0150 mg/L	9/9	LCR	2019
Bromodichloromethane	2.065 µg/L No EPA limit set worst single sample: 2.1 µg/L	8/16	SYR4	2012–2019
Dichloroacetic Acid	1.865 µg/L No EPA limit set worst single sample: 1.9 µg/L	8/10	SYR4	2012–2019
Lead	2.65 µg/L 18% of the EPA limit 15 µg/L worst single sample: 3 µg/L	8/20	SYR4	2014–2017
Total Haloacetic Acids (HAA5)	2.82 µg/L 4.7% of the EPA limit 60 µg/L worst single sample: 3.1 µg/L	8/10	SYR4	2012–2019
Dibromochloromethane	1.325 µg/L No EPA limit set worst single sample: 1.4 µg/L	6/16	SYR4	2012–2019
Dibromoacetic Acid	0.3555 µg/L No EPA limit set worst single sample: 0.3600 µg/L	4/10	SYR4	2012–2019
Arsenic	1 µg/L 10% of the EPA limit 10 µg/L	2/9	SYR4	2012–2017
Combined Radium (-226 And -228)	1.575 pCi/L 32% of the EPA limit 5 pCi/L worst single sample: 1.6 pCi/L	2/3	SYR4	2017
Gross Alpha, Excl. Radon And U	2.075 pCi/L 14% of the EPA limit 15 pCi/L worst single sample: 2.1 pCi/L	2/3	SYR4	2017
Trichloroacetic Acid	0.7870 µg/L No EPA limit set worst single sample: 0.8000 µg/L	2/10	SYR4	2012–2019
Combined Uranium	1 µg/L 3.3% of the EPA limit 30 µg/L	1/3	SYR4	2017

55 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, TotalBromoformChlorobenzeneCadmiumCarbofuranCarbon TetrachlorideChlordaneChromiumDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDinosebEndrinEthylbenzeneHexachlorobenzeneHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorMonobromoacetic AcidMonochloroacetic AcidNitriteOxamylPentachlorophenolPicloramSeleniumSimazineStyreneTetrachloroethyleneThallium, TotalTolueneToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact: SCHNEIDER, BRENDA
Phone: 406-822-3594

Frequently asked questions about Superior Town of

Is Superior Town of tap water safe to drink?

EPA monitoring detected 19 contaminants in Superior 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 Superior Town of's water?

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

How many people does Superior Town of serve?

Superior Town of reports serving 1,100 people in Montana, per its EPA record.

Has Superior Town of had any water quality violations?

The EPA has 12 violations on file for Superior 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.