Is Roundup Water Department Tap Water Safe? Quality Report

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

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	2023-01-01 → 2023-12-31
MR	Monitoring	Resolved	2023-01-01 → 2023-12-31
MR	Monitoring	Resolved	2023-01-01 → 2023-12-31
MR	Monitoring	Resolved	2023-01-01 → 2023-12-31
MON	Monitoring	Resolved	2020-07-01 → 2020-07-31
MON	Monitoring	Resolved	2020-07-01 → 2020-07-31
MON	Monitoring	Resolved	2020-07-01 → 2020-07-31
MON	Monitoring	Resolved	2019-06-01 → 2019-06-30
MON	Monitoring	Resolved	2019-06-01 → 2019-06-30
MON	Monitoring	Resolved	2019-06-01 → 2019-06-30

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
Copper	381.2 µg/L 29% of the EPA limit 1300 µg/L worst single sample: 623 µg/L	109/110	SYR4	2012–2018
Lead	17.9 µg/L 119% of the EPA limit, at the 95th percentile of samples — 15 µg/L worst single sample: 70 µg/L	52/110	SYR4	2012–2018
Lead	0.0410 mg/L 273% above the EPA limit of 0.0150 mg/L	18/18	LCR	2025
Bromodichloromethane	19.35 µg/L No EPA limit set worst single sample: 20 µg/L	14/14	SYR4	2013–2019
TTHM	51.75 µg/L 65% of the EPA limit 80 µg/L worst single sample: 55 µg/L	14/14	SYR4	2013–2019
Dibromochloromethane	18 µg/L No EPA limit set	13/14	SYR4	2013–2019
Bromoform	3.855 µg/L No EPA limit set worst single sample: 4.9 µg/L	12/14	SYR4	2013–2019
Chloroform	12.9 µg/L No EPA limit set worst single sample: 14 µg/L	12/14	SYR4	2013–2019
Dibromoacetic Acid	5.25 µg/L No EPA limit set worst single sample: 5.9 µg/L	11/11	SYR4	2013–2019
Dichloroacetic Acid	8.35 µg/L No EPA limit set worst single sample: 9.4 µg/L	11/11	SYR4	2013–2019
Total Haloacetic Acids (HAA5)	20 µg/L 33% of the EPA limit 60 µg/L worst single sample: 21 µg/L	11/11	SYR4	2013–2019
Trichloroacetic Acid	5.4 µg/L No EPA limit set worst single sample: 5.9 µg/L	11/11	SYR4	2013–2019
Nitrate-Nitrite	100 µg/L 1% of the EPA limit 10000 µg/L	10/18	SYR4	2012–2019
Monobromoacetic Acid	1.434 µg/L No EPA limit set worst single sample: 1.7 µg/L	8/11	SYR4	2013–2019
Arsenic	1 µg/L 10% of the EPA limit 10 µg/L	3/4	SYR4	2013–2019
Combined Radium (-226 And -228)	3 pCi/L 60% of the EPA limit 5 pCi/L worst single sample: 3.1 pCi/L	2/2	SYR4	2016–2019
Combined Uranium	3 µg/L 10% of the EPA limit 30 µg/L	1/1	SYR4	2016
Di(2-ethylhexyl) Phthalate	2.2 µg/L 37% of the EPA limit 6 µg/L	1/3	SYR4	2013–2019
Fluoride	300 µg/L 7.5% of the EPA limit 4000 µg/L	1/1	SYR4	2013
Selenium	2 µg/L 4% of the EPA limit 50 µg/L	1/1	SYR4	2013

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, TotalAsbestosAtrazineBhc-GammaBariumBenzeneBenzo(A)PyreneBeryllium, TotalChlorobenzeneCadmiumCarbofuranCarbon TetrachlorideChlordaneChromiumDichloromethaneDalaponDi(2-ethylhexyl) AdipateDinosebEndrinEthylbenzeneGross Alpha, Excl. Radon And UHexachlorobenzeneHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorMonochloroacetic AcidOxamylPentachlorophenolPicloramSimazineStyreneTetrachloroethyleneThallium, TotalTolueneToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact: LANTER, TANYA
Phone: 406-323-2804

Frequently asked questions about Roundup Water Department

Is Roundup Water Department tap water safe to drink?

EPA monitoring detected 20 contaminants in Roundup Water Department'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 Roundup Water Department's water?

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

How many people does Roundup Water Department serve?

Roundup Water Department reports serving 1,900 people in Montana, per its EPA record.

Has Roundup Water Department had any water quality violations?

The EPA has 34 violations on file for Roundup Water Department, 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.