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Tap water quality report

Jefferson Hills Wua

EPA monitoring tested this supplier for 66 contaminants and detected 9. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

66
contaminants tested
9
detected
780
people served
24
health-based violations
Montana rankingsLead in MontanaPFAS in Montana
Water source
Ground water
Ownership
Private
Counties served
Jefferson

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.

24
health-based violations
170
violations on file
1
still open
ViolationTypeStatusPeriod
TT Health-based Resolved 2023-06-03
TT Health-based Resolved 2023-06-03
TT Health-based Resolved 2023-06-03
MCL Health-based Resolved 2013-07-01 → 2013-07-31
MCL Health-based Resolved 2013-07-01 → 2013-07-31
MCL Health-based Resolved 2013-07-01 → 2013-07-31
MCL Health-based Resolved 2013-07-01 → 2013-07-31
MCL Health-based Resolved 2013-07-01 → 2013-07-31
MCL Health-based Resolved 2006-09-01 → 2006-09-30
MCL Health-based Resolved 2006-09-01 → 2006-09-30

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 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
2870 µg/L 29%
of the EPA limit 10000 µg/L
 18/18 SYR4 2012–2019
Copper
162 µg/L 12%
of the EPA limit 1300 µg/L
 15/15 SYR4 2012–2018
Lead
0.0010 mg/L 6.7%
of the EPA limit 0.0150 mg/L
 11/11 LCR 2024
Arsenic
8 µg/L 80%
of the EPA limit 10 µg/L
 4/4 SYR4 2012–2019
Lead
1 µg/L 6.7%
of the EPA limit 15 µg/L
 3/15 SYR4 2012–2018
Barium
27 µg/L 1.4%
of the EPA limit 2000 µg/L
 2/2 SYR4 2012–2013
Chromium
1 µg/L 1%
of the EPA limit 100 µg/L
 2/2 SYR4 2012–2013
Fluoride
550 µg/L 14%
of the EPA limit 4000 µg/L
 2/2 SYR4 2012–2013
Selenium
2 µg/L 4%
of the EPA limit 50 µg/L
 2/2 SYR4 2012–2013
57 contaminants tested, none detected
1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-DIBROMO-3-CHLOROPROPANE1,2-Dichloroethane1,2-Dichloropropane2,4,5-TP2,4-DAntimony, TotalAtrazineBhc-GammaBenzeneBenzo(A)PyreneBeryllium, TotalBromodichloromethaneBromoformChlorobenzeneCadmiumCarbofuranCarbon TetrachlorideChlordaneChloroformDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDibromochloromethaneDinosebEthylene DibromideEndrinEthylbenzeneHexachlorobenzeneHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorOxamylPentachlorophenolPicloramSimazineStyreneTTHMTetrachloroethyleneThallium, TotalTolueneTotal Polychlorinated Biphenyls (PCB)ToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
QUIGLEY, DUNCAN J
Phone
406-422-9194

Frequently asked questions about Jefferson Hills Wua

Is Jefferson Hills Wua tap water safe to drink?

EPA monitoring detected 9 contaminants in Jefferson Hills Wua'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 Jefferson Hills Wua's water?

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

How many people does Jefferson Hills Wua serve?

Jefferson Hills Wua reports serving 780 people in Montana, per its EPA record.

Has Jefferson Hills Wua had any water quality violations?

The EPA has 170 violations on file for Jefferson Hills Wua, of which 24 are health-based (a contaminant limit or required treatment was breached) and 1 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.