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Tap water quality report

Valley Grove Water Users Association

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
30
people served
1
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.

1
health-based violations
17
violations on file
0
still open
ViolationTypeStatusPeriod
MCL Health-based Resolved 1994-07-01 → 1994-07-31
MR Monitoring Resolved 2022-10-01
MR Monitoring Resolved 2022-10-01
MR Monitoring Resolved 2022-10-01
Other Monitoring Resolved 2006-07-01
Other Monitoring Resolved 2006-07-01
MR Monitoring Resolved 2006-01-01 → 2006-12-31
MR Monitoring Resolved 2006-01-01 → 2006-12-31
MR Monitoring Resolved 2006-01-01 → 2006-12-31
MR Monitoring Archived 1981-10-01 → 1982-09-30

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 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.
ContaminantLevel vs EPA limitDetection rateSourcePeriod
Nitrate-Nitrite
3740 µg/L 37%
of the EPA limit 10000 µg/L
 16/16 SYR4 2012–2019
Copper
285 µg/L 22%
of the EPA limit 1300 µg/L
worst single sample: 410 µg/L
11/15 SYR4 2013–2019
Lead
0.0100 mg/L 67%
of the EPA limit 0.0150 mg/L
 11/11 LCR 2019
Lead
12.8 µg/L 85%
of the EPA limit 15 µg/L
worst single sample: 17 µg/L
7/15 SYR4 2013–2019
Arsenic
2 µg/L 20%
of the EPA limit 10 µg/L
 1/3 SYR4 2012–2017
Barium
300 µg/L 15%
of the EPA limit 2000 µg/L
 1/1 SYR4 2012
Combined Radium (-226 And -228)
2.2 pCi/L 44%
of the EPA limit 5 pCi/L
 1/1 SYR4 2016
Combined Uranium
3 µg/L 10%
of the EPA limit 30 µg/L
 1/1 SYR4 2016
Fluoride
100 µg/L 2.5%
of the EPA limit 4000 µg/L
 1/1 SYR4 2012
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, TotalAtrazineBhc-GammaBenzeneBenzo(A)PyreneBeryllium, TotalBromodichloromethaneBromoformChlorobenzeneCadmiumCarbofuranCarbon TetrachlorideChlordaneChloroformChromiumDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDibromochloromethaneDinosebEndrinEthylbenzeneGross Alpha, Excl. Radon And UHexachlorobenzeneHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorOxamylPentachlorophenolPicloramSeleniumSimazineStyreneTTHMTetrachloroethyleneThallium, TotalTolueneToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
BEAUDIN, DANIEL
Phone
406-239-4233
Email
[email protected]

Frequently asked questions about Valley Grove Water Users Association

Is Valley Grove Water Users Association tap water safe to drink?

EPA monitoring detected 9 contaminants in Valley Grove Water Users Association'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 Grove Water Users Association's water?

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

How many people does Valley Grove Water Users Association serve?

Valley Grove Water Users Association reports serving 30 people in Montana, per its EPA record.

Has Valley Grove Water Users Association had any water quality violations?

The EPA has 17 violations on file for Valley Grove Water Users Association, of which 1 is 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.