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Tap water quality report

Valley Water System the

EPA monitoring tested this supplier for 68 contaminants and detected 8. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

68
contaminants tested
8
detected
82
people served
0
health-based violations
Montana rankingsLead in MontanaPFAS in Montana
Water source
Ground water
Ownership
Private
Counties served
Missoula

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.

0
health-based violations
121
violations on file
1
still open
ViolationTypeStatusPeriod
MR Monitoring Resolved 2020-01-01 → 2022-12-31
MR Monitoring Resolved 2020-01-01 → 2022-12-31
MR Monitoring Resolved 2020-01-01 → 2022-12-31
MR Monitoring Resolved 2020-01-01 → 2022-12-31
MR Monitoring Resolved 2020-01-01 → 2022-12-31
MR Monitoring Resolved 2020-01-01 → 2022-12-31
MR Monitoring Resolved 2020-01-01 → 2022-12-31
MR Monitoring Resolved 2020-01-01 → 2022-12-31
MR Monitoring Resolved 2020-01-01 → 2022-12-31
MR Monitoring Resolved 2020-01-01 → 2022-12-31

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 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
Copper
135 µg/L 10%
of the EPA limit 1300 µg/L
 19/21 SYR4 2012–2019
Nitrate-Nitrite
3230 µg/L 32%
of the EPA limit 10000 µg/L
 18/18 SYR4 2012–2019
Combined Uranium
1 µg/L 3.3%
of the EPA limit 30 µg/L
 7/7 SYR4 2012–2018
Lead
0.0 mg/L 0%
of the EPA limit 0.0150 mg/L
 6/6 LCR 2025
Lead
2 µg/L 13%
of the EPA limit 15 µg/L
 6/21 SYR4 2012–2019
Gross Alpha, Excl. Radon And U
4.3 pCi/L 29%
of the EPA limit 15 pCi/L
 4/7 SYR4 2012–2018
Combined Radium (-226 And -228)
3.5 pCi/L 70%
of the EPA limit 5 pCi/L
 3/4 SYR4 2012–2018
Barium
660 µg/L 33%
of the EPA limit 2000 µg/L
 2/2 SYR4 2012–2017
60 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, TotalArsenicAsbestosAtrazineBhc-GammaBenzeneBenzo(A)PyreneBeryllium, TotalBromodichloromethaneBromoformChlorobenzeneCadmiumCarbofuranCarbon TetrachlorideChlordaneChloroformChromiumDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDibromochloromethaneDinosebEndrinEthylbenzeneFluorideHexachlorobenzeneHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorNitriteOxamylPentachlorophenolPicloramSeleniumSimazineStyreneTTHMTetrachloroethyleneThallium, TotalTolueneToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
TRANGMOE, GREG
Phone
406-880-2009

Frequently asked questions about Valley Water System the

Is Valley Water System the tap water safe to drink?

EPA monitoring detected 8 contaminants in Valley Water System the'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 Valley Water System the's water?

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

How many people does Valley Water System the serve?

Valley Water System the reports serving 82 people in Montana, per its EPA record.

Has Valley Water System the had any water quality violations?

The EPA has 121 violations on file for Valley Water System the, of which 0 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.