Is Oilmont County Water District Tap Water Safe? Quality Report

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

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.

174

health-based violations

1,105

violations on file

still open

Violation	Type	Status	Period
TT	Health-based	Resolved	2021-04-01 → 2021-04-30
TT	Health-based	Resolved	2021-04-01 → 2021-04-30
TT	Health-based	Resolved	2021-04-01 → 2021-04-30
TT	Health-based	Resolved	2021-04-01 → 2021-04-30
TT	Health-based	Resolved	2021-03-01 → 2021-03-31
TT	Health-based	Resolved	2021-03-01 → 2021-03-31
TT	Health-based	Resolved	2021-03-01 → 2021-03-31
TT	Health-based	Resolved	2021-03-01 → 2021-03-31
TT	Health-based	Resolved	2020-01-01 → 2020-01-31
TT	Health-based	Resolved	2020-01-01 → 2020-01-31

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	1371.5 µg/L 14% of the EPA limit 10000 µg/L worst single sample: 1410 µg/L	32/32	SYR4	2012–2019
Copper	150.8 µg/L 12% of the EPA limit 1300 µg/L worst single sample: 160 µg/L	25/25	SYR4	2015–2017
Lead	0.0 mg/L 0% of the EPA limit 0.0150 mg/L	13/13	LCR	2025
Lead	3 µg/L 20% of the EPA limit 15 µg/L	3/25	SYR4	2015–2017
TTHM	2.24 µg/L 2.8% of the EPA limit 80 µg/L worst single sample: 2.3 µg/L	3/9	SYR4	2013–2019
Bromodichloromethane	0.9250 µg/L No EPA limit set worst single sample: 0.9400 µg/L	2/9	SYR4	2013–2019
Dibromochloromethane	0.6145 µg/L No EPA limit set worst single sample: 0.6200 µg/L	2/9	SYR4	2013–2019
Fluoride	200 µg/L 5% of the EPA limit 4000 µg/L	2/2	SYR4	2012
Chloroform	0.8500 µg/L No EPA limit set	1/9	SYR4	2013–2019
Dibromoacetic Acid	0.2600 µg/L No EPA limit set	1/3	SYR4	2016–2019
Selenium	7 µg/L 14% of the EPA limit 50 µg/L	1/2	SYR4	2012
Total Haloacetic Acids (HAA5)	0.2600 µg/L 0.4% of the EPA limit 60 µg/L	1/3	SYR4	2016–2019

57 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, TotalArsenicAtrazineBhc-GammaBariumBenzeneBenzo(A)PyreneBeryllium, TotalBromoformChlorobenzeneCadmiumCarbofuranCarbon TetrachlorideChlordaneChromiumDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDichloroacetic AcidDinosebEndrinEthylbenzeneHexachlorobenzeneHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorMonobromoacetic AcidMonochloroacetic AcidOxamylPentachlorophenolPicloramSimazineStyreneTetrachloroethyleneThallium, TotalTolueneToxapheneTrichloroacetic AcidTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact: WALLEWEIN, MICHAEL J
Phone: 406-937-2775
Email: [email protected]

Frequently asked questions about Oilmont County Water District

Is Oilmont County Water District tap water safe to drink?

EPA monitoring detected 12 contaminants in Oilmont County Water District'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 Oilmont County Water District's water?

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

How many people does Oilmont County Water District serve?

Oilmont County Water District reports serving 300 people in Montana, per its EPA record.

Has Oilmont County Water District had any water quality violations?

The EPA has 1105 violations on file for Oilmont County Water District, of which 174 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.