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Tap water quality report

Miller Colony

EPA monitoring tested this supplier for 73 contaminants and detected 20. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

73
contaminants tested
20
detected
84
people served
21
health-based violations
Montana rankingsLead in MontanaPFAS in Montana
Water source
Ground water
Ownership
Private
Counties served
Teton

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.

21
health-based violations
266
violations on file
0
still open
ViolationTypeStatusPeriod
TT Health-based Resolved 2016-01-01 → 2016-01-31
TT Health-based Resolved 2016-01-01 → 2016-01-31
TT Health-based Resolved 2016-01-01 → 2016-01-31
TT Health-based Resolved 2016-01-01 → 2016-01-31
TT Health-based Resolved 2012-01-01
TT Health-based Resolved 2012-01-01
TT Health-based Resolved 2012-01-01
MCL Health-based Resolved 2011-07-01 → 2011-07-31
MCL Health-based Resolved 2011-07-01 → 2011-07-31
MCL Health-based Resolved 2011-07-01 → 2011-07-31

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 single worst sample on record — over 100% is worth reading, but is not by itself a violation. Formal violations are listed separately.
ContaminantLevel vs EPA limitDetection rateSourcePeriod
Nitrate-Nitrite
9090 µg/L 91%
of the EPA limit 10000 µg/L
 42/42 SYR4 2012–2019
Copper
985 µg/L 76%
of the EPA limit 1300 µg/L
 23/30 SYR4 2012–2017
Lead
0.0030 mg/L 20%
of the EPA limit 0.0150 mg/L
 16/16 LCR 2019
TTHM
19 µg/L 24%
of the EPA limit 80 µg/L
 9/16 SYR4 2012–2018
Combined Uranium
4 µg/L 13%
of the EPA limit 30 µg/L
 8/8 SYR4 2012–2018
Lead
2 µg/L 13%
of the EPA limit 15 µg/L
 8/30 SYR4 2012–2017
Bromodichloromethane
5.1 µg/L
No EPA limit set
 7/16 SYR4 2012–2018
Chloroform
14 µg/L
No EPA limit set
 7/16 SYR4 2012–2018
Dibromochloromethane
5.9 µg/L
No EPA limit set
 5/16 SYR4 2012–2018
Gross Alpha, Excl. Radon And U
5 pCi/L 33%
of the EPA limit 15 pCi/L
 5/8 SYR4 2012–2018
Total Haloacetic Acids (HAA5)
5.2 µg/L 8.7%
of the EPA limit 60 µg/L
 5/6 SYR4 2012–2017
Bromoform
10 µg/L
No EPA limit set
 4/16 SYR4 2012–2018
Dibromoacetic Acid
3.8 µg/L
No EPA limit set
 4/6 SYR4 2012–2017
Dichloroacetic Acid
1.5 µg/L
No EPA limit set
 4/6 SYR4 2012–2017
Combined Radium (-226 And -228)
1.7 pCi/L 34%
of the EPA limit 5 pCi/L
 3/8 SYR4 2012–2018
Picloram
8.8 µg/L 1.8%
of the EPA limit 500 µg/L
 3/15 SYR4 2012–2019
Dichloromethane
1.9 µg/L 38%
of the EPA limit 5 µg/L
 2/10 SYR4 2013–2018
Fluoride
800 µg/L 20%
of the EPA limit 4000 µg/L
 2/2 SYR4 2014–2018
Trichloroacetic Acid
0.5700 µg/L
No EPA limit set
 2/6 SYR4 2012–2017
Arsenic
3 µg/L 30%
of the EPA limit 10 µg/L
 1/4 SYR4 2014–2018
53 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-GammaBariumBenzeneBenzo(A)PyreneBeryllium, TotalChlorobenzeneCadmiumCarbofuranCarbon TetrachlorideChlordaneChromiumDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDinosebEndrinEthylbenzeneGross Beta Particle ActivityHexachlorobenzeneHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorMonobromoacetic AcidMonochloroacetic AcidOxamylPentachlorophenolSeleniumSimazineStyreneTetrachloroethyleneThallium, TotalTolueneToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
HOFER, JACOB J
Phone
406-952-5614

Frequently asked questions about Miller Colony

Is Miller Colony tap water safe to drink?

EPA monitoring detected 20 contaminants in Miller Colony'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 Miller Colony's water?

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

How many people does Miller Colony serve?

Miller Colony reports serving 84 people in Montana, per its EPA record.

Has Miller Colony had any water quality violations?

The EPA has 266 violations on file for Miller Colony, of which 21 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.