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Tap water quality report

Lower Pioneer Mountain Water

EPA monitoring tested this supplier for 66 contaminants and detected 7. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

66
contaminants tested
7
detected
350
people served
7
health-based violations
Montana rankingsLead in MontanaPFAS in Montana
Water source
Ground water
Ownership
Private
Counties served
Madison

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.

7
health-based violations
168
violations on file
0
still open
ViolationTypeStatusPeriod
MCL Health-based Resolved 2020-09-01 → 2020-09-30
MCL Health-based Resolved 2020-09-01 → 2020-09-30
MCL Health-based Resolved 2020-09-01 → 2020-09-30
MCL Health-based Resolved 2015-02-01 → 2015-02-28
MCL Health-based Resolved 2015-02-01 → 2015-02-28
MCL Health-based Resolved 2015-02-01 → 2015-02-28
MCL Health-based Resolved 2015-02-01 → 2015-02-28
Other Monitoring Resolved 2020-07-01
Other Monitoring Resolved 2020-07-01
MR Monitoring Resolved 2010-12-01

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 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
370 µg/L 3.7%
of the EPA limit 10000 µg/L
 14/20 SYR4 2012–2019
Lead
0.0010 mg/L 6.7%
of the EPA limit 0.0150 mg/L
 12/12 LCR 2025
Copper
202.5 µg/L 16%
of the EPA limit 1300 µg/L
worst single sample: 214 µg/L
6/10 SYR4 2014–2017
Lead
17.6 µg/L 117%
of the EPA limit, at the 95th percentile of samples — 15 µg/L
worst single sample: 20 µg/L
4/10 SYR4 2014–2017
Fluoride
800 µg/L 20%
of the EPA limit 4000 µg/L
 2/2 SYR4 2015–2018
Combined Radium (-226 And -228)
3.1 pCi/L 62%
of the EPA limit 5 pCi/L
 1/1 SYR4 2018
Gross Alpha, Excl. Radon And U
3.6 pCi/L 24%
of the EPA limit 15 pCi/L
 1/1 SYR4 2018
59 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-GammaBariumBenzeneBenzo(A)PyreneBeryllium, TotalBromodichloromethaneBromoformChlorobenzeneCadmiumCarbofuranCarbon TetrachlorideChlordaneChloroformChromiumCombined UraniumDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDibromochloromethaneDinosebEndrinEthylbenzeneHexachlorobenzeneHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorOxamylPentachlorophenolPicloramSeleniumSimazineStyreneTTHMTetrachloroethyleneThallium, TotalTolueneToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
MARSH, TANNER R
Phone
406-577-4936
Email
[email protected]

Frequently asked questions about Lower Pioneer Mountain Water

Is Lower Pioneer Mountain Water tap water safe to drink?

EPA monitoring detected 7 contaminants in Lower Pioneer Mountain Water'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 Lower Pioneer Mountain Water's water?

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

How many people does Lower Pioneer Mountain Water serve?

Lower Pioneer Mountain Water reports serving 350 people in Montana, per its EPA record.

Has Lower Pioneer Mountain Water had any water quality violations?

The EPA has 168 violations on file for Lower Pioneer Mountain Water, of which 7 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.