Tap WaterIndex

← Montana

Tap water quality report

Ten Mile and Pleasant Valley Wua

EPA monitoring tested this supplier for 73 contaminants and detected 19. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

73
contaminants tested
19
detected
750
people served
8
health-based violations
Montana rankingsLead in MontanaPFAS in Montana
Water source
Ground water
Ownership
Private
Counties served
Lewis and Clark

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.

8
health-based violations
457
violations on file
1
still open
ViolationTypeStatusPeriod
TT Health-based Resolved 2024-04-01
TT Health-based Resolved 2024-04-01
TT Health-based Resolved 2024-04-01
MCL Health-based Resolved 2014-05-01 → 2014-05-31
MCL Health-based Resolved 2014-05-01 → 2014-05-31
MCL Health-based Resolved 2014-05-01 → 2014-05-31
MCL Health-based Resolved 2014-05-01 → 2014-05-31
MCL Health-based Resolved 2014-05-01 → 2014-05-31
MR Monitoring Unaddressed 2026-01-01
MR Monitoring Resolved 2024-04-01

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
0.0 mg/L 0%
of the EPA limit 0.0150 mg/L
 27/27 LCR 2027
Copper
910 µg/L 70%
of the EPA limit 1300 µg/L
 20/20 SYR4 2014–2017
Nitrate-Nitrite
1050 µg/L 11%
of the EPA limit 10000 µg/L
 16/16 SYR4 2012–2019
Dibromochloromethane
1.7 µg/L
No EPA limit set
 6/8 SYR4 2013–2019
Bromodichloromethane
1.34 µg/L
No EPA limit set
 5/8 SYR4 2013–2019
Dibromoacetic Acid
0.9880 µg/L
No EPA limit set
 5/5 SYR4 2014–2019
Lead
2 µg/L 13%
of the EPA limit 15 µg/L
 5/20 SYR4 2014–2017
TTHM
3.79 µg/L 4.7%
of the EPA limit 80 µg/L
 5/5 SYR4 2014–2019
Bromoform
1.93 µg/L
No EPA limit set
 4/8 SYR4 2013–2019
Total Haloacetic Acids (HAA5)
2.15 µg/L 3.6%
of the EPA limit 60 µg/L
 4/5 SYR4 2014–2019
Arsenic
6 µg/L 60%
of the EPA limit 10 µg/L
 3/3 SYR4 2013–2019
Barium
40 µg/L 2%
of the EPA limit 2000 µg/L
 3/3 SYR4 2013–2019
Fluoride
460 µg/L 12%
of the EPA limit 4000 µg/L
 3/3 SYR4 2013–2019
Chloroform
0.6200 µg/L
No EPA limit set
 1/8 SYR4 2013–2019
Combined Radium (-226 And -228)
0.8000 pCi/L 16%
of the EPA limit 5 pCi/L
 1/2 SYR4 2013–2019
Combined Uranium
2 µg/L 6.7%
of the EPA limit 30 µg/L
 1/1 SYR4 2019
Dichloroacetic Acid
1 µg/L
No EPA limit set
 1/5 SYR4 2014–2019
Gross Alpha, Excl. Radon And U
2.2 pCi/L 15%
of the EPA limit 15 pCi/L
 1/2 SYR4 2013–2019
Monochloroacetic Acid
1.31 µg/L
No EPA limit set
 1/5 SYR4 2014–2019
54 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, TotalChlorobenzeneCadmiumCarbofuranCarbon TetrachlorideChlordaneChromiumDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDinosebEndrinEthylbenzeneHexachlorobenzeneHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorMonobromoacetic AcidOxamylPentachlorophenolPicloramSeleniumSimazineStyreneTetrachloroethyleneThallium, TotalTolueneTotal Polychlorinated Biphenyls (PCB)ToxapheneTrichloroacetic AcidTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
PARKER, JO
Phone
406-442-3939

Frequently asked questions about Ten Mile and Pleasant Valley Wua

Is Ten Mile and Pleasant Valley Wua tap water safe to drink?

EPA monitoring detected 19 contaminants in Ten Mile and Pleasant Valley 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 Ten Mile and Pleasant Valley Wua's water?

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

How many people does Ten Mile and Pleasant Valley Wua serve?

Ten Mile and Pleasant Valley Wua reports serving 750 people in Montana, per its EPA record.

Has Ten Mile and Pleasant Valley Wua had any water quality violations?

The EPA has 457 violations on file for Ten Mile and Pleasant Valley Wua, of which 8 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.