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Tap water quality report

Thompson Ranchettes Ii

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
100
people served
5
health-based violations
Montana rankingsLead in MontanaPFAS in Montana
Water source
Ground water
Ownership
Private
Counties served
Flathead

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.

5
health-based violations
51
violations on file
0
still open
ViolationTypeStatusPeriod
MCL Health-based Resolved 2009-03-01 → 2009-03-31
MCL Health-based Resolved 2009-03-01 → 2009-03-31
MCL Health-based Resolved 2009-03-01 → 2009-03-31
MCL Health-based Resolved 2009-03-01 → 2009-03-31
MCL Health-based Resolved 2009-03-01 → 2009-03-31
Other Monitoring Resolved 2020-10-01
Other Monitoring Resolved 2020-10-01
Other Monitoring Resolved 2011-10-01
Other Monitoring Resolved 2011-10-01
Other Monitoring Resolved 2011-10-01

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
Copper
150 µg/L 12%
of the EPA limit 1300 µg/L
 14/15 SYR4 2013–2019
Lead
0.0050 mg/L 33%
of the EPA limit 0.0150 mg/L
 14/14 LCR 2025
Nitrate-Nitrite
120 µg/L 1.2%
of the EPA limit 10000 µg/L
 8/8 SYR4 2012–2019
Lead
7 µg/L 47%
of the EPA limit 15 µg/L
 2/15 SYR4 2013–2019
Nitrate
120 µg/L 1.2%
of the EPA limit 10000 µg/L
 2/2 SYR4 2013
Barium
260 µg/L 13%
of the EPA limit 2000 µg/L
 1/1 SYR4 2013
Combined Radium (-226 And -228)
2.3 pCi/L 46%
of the EPA limit 5 pCi/L
 1/2 SYR4 2013–2016
Fluoride
80 µg/L 2%
of the EPA limit 4000 µg/L
 1/1 SYR4 2013
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, TotalArsenicAtrazineBhc-GammaBenzeneBenzo(A)PyreneBeryllium, TotalBromodichloromethaneBromoformChlorobenzeneCadmiumCarbofuranCarbon TetrachlorideChlordaneChloroformChromiumCombined UraniumDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDibromochloromethaneDinosebEndrinEthylbenzeneGross Alpha, Excl. Radon And UHexachlorobenzeneHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorNitriteOxamylPentachlorophenolPicloramSeleniumSimazineStyreneTTHMTetrachloroethyleneThallium, TotalTolueneToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
OLSEN, G D
Phone
406-249-7066

Frequently asked questions about Thompson Ranchettes Ii

Is Thompson Ranchettes Ii tap water safe to drink?

EPA monitoring detected 8 contaminants in Thompson Ranchettes Ii'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 Thompson Ranchettes Ii's water?

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

How many people does Thompson Ranchettes Ii serve?

Thompson Ranchettes Ii reports serving 100 people in Montana, per its EPA record.

Has Thompson Ranchettes Ii had any water quality violations?

The EPA has 51 violations on file for Thompson Ranchettes Ii, of which 5 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.