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Tap water quality report

Stillwater Water District

EPA monitoring tested this supplier for 68 contaminants and detected 7. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

68
contaminants tested
7
detected
85
people served
2
health-based violations
Montana rankingsLead in MontanaPFAS in Montana
Water source
Ground water
Ownership
Local government
Counties served
Flathead

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.

2
health-based violations
252
violations on file
0
still open
ViolationTypeStatusPeriod
MCL Health-based Resolved 1996-06-01 → 1996-06-30
MCL Health-based Resolved 1996-06-01 → 1996-06-30
MR Monitoring Resolved 2024-01-01 → 2024-12-31
MR Monitoring Resolved 2024-01-01 → 2024-12-31
MR Monitoring Resolved 2024-01-01 → 2024-12-31
MR Monitoring Resolved 2001-10-01 → 2001-10-31
MR Monitoring Resolved 2001-10-01 → 2001-10-31
MR Monitoring Resolved 2001-10-01 → 2001-10-31
MR Monitoring Resolved 2001-10-01 → 2001-10-31
MR Monitoring Resolved 2001-07-01

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
Lead
0.0010 mg/L 6.7%
of the EPA limit 0.0150 mg/L
 13/13 LCR 2024
Copper
70 µg/L 5.4%
of the EPA limit 1300 µg/L
 12/15 SYR4 2013–2019
Nitrate-Nitrite
140 µg/L 1.4%
of the EPA limit 10000 µg/L
 8/8 SYR4 2012–2019
Lead
5 µg/L 33%
of the EPA limit 15 µg/L
 7/15 SYR4 2013–2019
Nitrate
130 µg/L 1.3%
of the EPA limit 10000 µg/L
 4/4 SYR4 2012–2019
Barium
50 µg/L 2.5%
of the EPA limit 2000 µg/L
 3/3 SYR4 2012–2019
Fluoride
150 µg/L 3.8%
of the EPA limit 4000 µg/L
 3/3 SYR4 2012–2019
61 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-GammaBenzeneBenzo(A)PyreneBeryllium, TotalBromodichloromethaneBromoformChlorobenzeneCadmiumCarbofuranCarbon TetrachlorideChlordaneChloroformChromiumCombined Radium (-226 And -228)Combined UraniumDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDibromochloromethaneDinosebEndrinEthylbenzeneGross Alpha, Excl. Radon And UHexachlorobenzeneHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorNitriteOxamylPentachlorophenolPicloramSeleniumSimazineStyreneTTHMTetrachloroethyleneThallium, TotalTolueneToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
KRUSE, WESLEY J
Phone
406-755-1964

Frequently asked questions about Stillwater Water District

Is Stillwater Water District tap water safe to drink?

EPA monitoring detected 7 contaminants in Stillwater 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 Stillwater Water District's water?

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

How many people does Stillwater Water District serve?

Stillwater Water District reports serving 85 people in Montana, per its EPA record.

Has Stillwater Water District had any water quality violations?

The EPA has 252 violations on file for Stillwater Water District, of which 2 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.