Is Three Forks City of Tap Water Safe? Quality Report

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

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

158

violations on file

still open

Violation	Type	Status	Period
MCL	Health-based	Resolved	2019-01-01 → 2019-03-31
MCL	Health-based	Resolved	2019-01-01 → 2019-03-31
MCL	Health-based	Resolved	2019-01-01 → 2019-03-31
MCL	Health-based	Archived	1980-01-30 → 1981-01-29
Other	Monitoring	Resolved	2019-07-01
Other	Monitoring	Resolved	2019-07-01
MR	Monitoring	Resolved	2005-09-01 → 2005-09-30
MR	Monitoring	Resolved	2005-09-01 → 2005-09-30
MR	Monitoring	Resolved	2005-09-01 → 2005-09-30
MR	Monitoring	Resolved	2003-01-01 → 2003-12-31

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
Arsenic	15.3 µg/L 153% of the EPA limit, at the 95th percentile of samples — 10 µg/L worst single sample: 67 µg/L	59/62	SYR4	2012–2019
Copper	161 µg/L 12% of the EPA limit 1300 µg/L worst single sample: 236 µg/L	46/48	SYR4	2012–2019
Nitrate-Nitrite	701 µg/L 7% of the EPA limit 10000 µg/L worst single sample: 1130 µg/L	34/66	SYR4	2012–2019
Lead	0.0020 mg/L 13% of the EPA limit 0.0150 mg/L	14/14	LCR	2025
Combined Uranium	7 µg/L 23% of the EPA limit 30 µg/L	13/13	SYR4	2013–2019
Lead	11.8 µg/L 79% of the EPA limit 15 µg/L worst single sample: 19 µg/L	10/48	SYR4	2012–2019
Fluoride	2400 µg/L 60% of the EPA limit 4000 µg/L	9/9	SYR4	2013–2018
TTHM	24.4 µg/L 31% of the EPA limit 80 µg/L worst single sample: 34 µg/L	9/39	SYR4	2012–2019
Combined Radium (-226 And -228)	1.865 pCi/L 37% of the EPA limit 5 pCi/L worst single sample: 1.9 pCi/L	8/9	SYR4	2014–2018
Dibromoacetic Acid	3.945 µg/L No EPA limit set worst single sample: 4.4 µg/L	8/9	SYR4	2014–2019
Gross Alpha, Excl. Radon And U	19.95 pCi/L 133% of the EPA limit, at the 95th percentile of samples — 15 pCi/L worst single sample: 21 pCi/L	8/11	SYR4	2013–2018
Total Haloacetic Acids (HAA5)	6.395 µg/L 11% of the EPA limit 60 µg/L worst single sample: 7.2 µg/L	8/9	SYR4	2014–2019
Dibromochloromethane	9.125 µg/L No EPA limit set worst single sample: 11 µg/L	6/39	SYR4	2012–2019
Bromodichloromethane	5.84 µg/L No EPA limit set worst single sample: 7 µg/L	5/39	SYR4	2012–2019
Bromoform	7.18 µg/L No EPA limit set worst single sample: 7.6 µg/L	5/39	SYR4	2012–2019
Dichloroacetic Acid	1.58 µg/L No EPA limit set worst single sample: 1.6 µg/L	5/9	SYR4	2014–2019
Barium	70 µg/L 3.5% of the EPA limit 2000 µg/L	2/8	SYR4	2013–2018
Selenium	1.95 µg/L 3.9% of the EPA limit 50 µg/L worst single sample: 2 µg/L	2/8	SYR4	2013–2018
Antimony, Total	2 µg/L 33% of the EPA limit 6 µg/L	1/12	SYR4	2013–2018
Chloroform	8.8 µg/L No EPA limit set	1/39	SYR4	2012–2019
Dalapon	5.3 µg/L 2.7% of the EPA limit 200 µg/L	1/15	SYR4	2013–2018
Monobromoacetic Acid	0.8000 µg/L No EPA limit set	1/9	SYR4	2014–2019
Monochloroacetic Acid	1.1 µg/L No EPA limit set	1/9	SYR4	2014–2019
Toluene	1.2 µg/L 0.1% of the EPA limit 1000 µg/L	1/30	SYR4	2012–2018
Trichloroacetic Acid	0.7100 µg/L No EPA limit set	1/9	SYR4	2014–2019

48 contaminants tested, none detected

1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-Dichloroethane1,2-Dichloropropane2,4,5-TP2,4-DAtrazineBhc-GammaBenzeneBenzo(A)PyreneBeryllium, TotalChlorobenzeneCadmiumCarbofuranCarbon TetrachlorideChlordaneChromiumDichloromethaneDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDinosebEndrinEthylbenzeneHexachlorobenzeneHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorNitriteOxamylPentachlorophenolPicloramSimazineStyreneTetrachloroethyleneThallium, TotalToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact: TURNER, CRYSTAL
Phone: 406-285-3431

Frequently asked questions about Three Forks City of

Is Three Forks City of tap water safe to drink?

EPA monitoring detected 25 contaminants in Three Forks 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 Three Forks City of's water?

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

How many people does Three Forks City of serve?

Three Forks City of reports serving 1,900 people in Montana, per its EPA record.

Has Three Forks City of had any water quality violations?

The EPA has 158 violations on file for Three Forks City of, of which 4 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.