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Tap water quality report

Choteau City of

EPA monitoring tested this supplier for 74 contaminants and detected 16. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

74
contaminants tested
16
detected
1,691
people served
0
health-based violations
Montana rankingsLead in MontanaPFAS in Montana
Water source
Ground water
Ownership
Local government
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.

0
health-based violations
39
violations on file
0
still open
ViolationTypeStatusPeriod
MR Monitoring Resolved 2025-01-01 → 2025-12-31
MR Monitoring Resolved 2025-01-01 → 2025-12-31
MR Monitoring Resolved 2025-01-01 → 2025-12-31
MR Monitoring Resolved 2025-01-01 → 2025-12-31
MR Monitoring Resolved 2014-09-01 → 2015-08-31
MR Monitoring Resolved 2014-09-01 → 2015-08-31
MR Monitoring Resolved 2014-09-01 → 2015-08-31
MR Monitoring Resolved 2014-09-01 → 2015-08-31
MR Monitoring Resolved 2014-09-01 → 2015-08-31
MR Monitoring Resolved 2014-09-01 → 2015-08-31

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.
ContaminantLevel vs EPA limitDetection rateSourcePeriod
Nitrate-Nitrite
477 µg/L 4.8%
of the EPA limit 10000 µg/L
worst single sample: 610 µg/L
40/40 SYR4 2012–2019
Copper
170.6 µg/L 13%
of the EPA limit 1300 µg/L
worst single sample: 239 µg/L
20/20 SYR4 2014–2017
Lead
16.8 µg/L 112%
of the EPA limit, at the 95th percentile of samples — 15 µg/L
worst single sample: 44 µg/L
17/20 SYR4 2014–2017
Lead
0.0040 mg/L 27%
of the EPA limit 0.0150 mg/L
 12/12 LCR 2026
Chloroform
7.885 µg/L
No EPA limit set
worst single sample: 10 µg/L
10/16 SYR4 2012–2019
TTHM
11.94 µg/L 15%
of the EPA limit 80 µg/L
worst single sample: 15 µg/L
10/16 SYR4 2012–2019
Bromodichloromethane
3.26 µg/L
No EPA limit set
worst single sample: 3.9 µg/L
9/16 SYR4 2012–2019
Total Haloacetic Acids (HAA5)
10.37 µg/L 17%
of the EPA limit 60 µg/L
worst single sample: 11 µg/L
7/10 SYR4 2013–2019
Dichloroacetic Acid
6.45 µg/L
No EPA limit set
worst single sample: 7.1 µg/L
6/10 SYR4 2013–2019
Dibromochloromethane
0.7080 µg/L
No EPA limit set
worst single sample: 0.7300 µg/L
5/16 SYR4 2012–2019
Fluoride
300 µg/L 7.5%
of the EPA limit 4000 µg/L
 4/4 SYR4 2012–2018
Trichloroacetic Acid
4.37 µg/L
No EPA limit set
worst single sample: 4.4 µg/L
3/10 SYR4 2013–2019
Barium
100 µg/L 5%
of the EPA limit 2000 µg/L
 2/4 SYR4 2012–2018
Gross Alpha, Excl. Radon And U
4.155 pCi/L 28%
of the EPA limit 15 pCi/L
worst single sample: 4.2 pCi/L
2/2 SYR4 2012–2018
Arsenic
1 µg/L 10%
of the EPA limit 10 µg/L
 1/8 SYR4 2012–2018
Dibromoacetic Acid
0.2700 µg/L
No EPA limit set
 1/10 SYR4 2013–2019
58 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, TotalAsbestosAtrazineBhc-GammaBenzeneBenzo(A)PyreneBeryllium, TotalBromoformChlorobenzeneCadmiumCarbofuranCarbon TetrachlorideChlordaneChromiumCombined Radium (-226 And -228)Combined UraniumDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDinosebEndrinEthylbenzeneGross Beta Particle ActivityHexachlorobenzeneHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorMonobromoacetic AcidMonochloroacetic AcidOxamylPentachlorophenolPicloramSeleniumSimazineStyreneTetrachloroethyleneThallium, TotalTolueneToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
FROWNFELDER, TOM
Phone
406-466-2510
Email
[email protected]

Frequently asked questions about Choteau City of

Is Choteau City of tap water safe to drink?

EPA monitoring detected 16 contaminants in Choteau City 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 Choteau City of's water?

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

How many people does Choteau City of serve?

Choteau City of reports serving 1,691 people in Montana, per its EPA record.

Has Choteau City of had any water quality violations?

The EPA has 39 violations on file for Choteau City 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.