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Tap water quality report

Valley Grove Subdivision

EPA monitoring tested this supplier for 66 contaminants and detected 11. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

66
contaminants tested
11
detected
825
people served
25
health-based violations
Montana rankingsLead in MontanaPFAS in Montana
Water source
Ground water
Ownership
Private
Counties served
Gallatin

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.

25
health-based violations
148
violations on file
0
still open
ViolationTypeStatusPeriod
MCL Health-based Resolved 2015-09-01 → 2015-09-30
MCL Health-based Resolved 2015-09-01 → 2015-09-30
MCL Health-based Resolved 2015-09-01 → 2015-09-30
MCL Health-based Resolved 2015-09-01 → 2015-09-30
MCL Health-based Resolved 2015-09-01 → 2015-09-30
MCL Health-based Resolved 2014-12-01 → 2014-12-31
MCL Health-based Resolved 2014-12-01 → 2014-12-31
MCL Health-based Resolved 2014-12-01 → 2014-12-31
MCL Health-based Resolved 2014-12-01 → 2014-12-31
MCL Health-based Resolved 2014-12-01 → 2014-12-31

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
Nitrate-Nitrite
2660 µg/L 27%
of the EPA limit 10000 µg/L
 66/66 SYR4 2012–2019
Copper
440 µg/L 34%
of the EPA limit 1300 µg/L
 30/30 SYR4 2012–2019
Lead
0.0020 mg/L 14%
of the EPA limit 0.0150 mg/L
 13/13 LCR 2025
Lead
12 µg/L 80%
of the EPA limit 15 µg/L
 8/30 SYR4 2012–2019
Arsenic
1 µg/L 10%
of the EPA limit 10 µg/L
 5/8 SYR4 2013–2019
Fluoride
200 µg/L 5%
of the EPA limit 4000 µg/L
 5/8 SYR4 2013–2019
Barium
60 µg/L 3%
of the EPA limit 2000 µg/L
 4/8 SYR4 2013–2019
Combined Uranium
5 µg/L 17%
of the EPA limit 30 µg/L
 4/4 SYR4 2013–2015
Gross Alpha, Excl. Radon And U
4.8 pCi/L 32%
of the EPA limit 15 pCi/L
 3/3 SYR4 2013–2015
Combined Radium (-226 And -228)
2.2 pCi/L 44%
of the EPA limit 5 pCi/L
 2/2 SYR4 2015
Di(2-ethylhexyl) Phthalate
2.8 µg/L 47%
of the EPA limit 6 µg/L
 2/13 SYR4 2013–2019
55 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) AdipateDibromochloromethaneDinosebEndrinEthylbenzeneHexachlorobenzeneHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorOxamylPentachlorophenolPicloramSeleniumSimazineStyreneTTHMTetrachloroethyleneThallium, TotalTolueneToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
ADAMS, PETE J
Phone
406-580-1527

Frequently asked questions about Valley Grove Subdivision

Is Valley Grove Subdivision tap water safe to drink?

EPA monitoring detected 11 contaminants in Valley Grove Subdivision'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 Subdivision'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 Subdivision serve?

Valley Grove Subdivision reports serving 825 people in Montana, per its EPA record.

Has Valley Grove Subdivision had any water quality violations?

The EPA has 148 violations on file for Valley Grove Subdivision, of which 25 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.