Tap WaterIndex

← Montana

Tap water quality report

Flathead County Water Dist 101

EPA monitoring tested this supplier for 68 contaminants and detected 11. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

68
contaminants tested
11
detected
210
people served
49
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.

49
health-based violations
712
violations on file
1
still open
ViolationTypeStatusPeriod
MCL Health-based Resolved 2015-12-01 → 2015-12-31
MCL Health-based Resolved 2015-12-01 → 2015-12-31
MCL Health-based Resolved 2015-12-01 → 2015-12-31
MCL Health-based Resolved 2015-12-01 → 2015-12-31
MCL Health-based Resolved 2015-12-01 → 2015-12-31
MCL Health-based Resolved 2013-01-01 → 2013-01-31
MCL Health-based Resolved 2013-01-01 → 2013-01-31
MCL Health-based Resolved 2013-01-01 → 2013-01-31
MCL Health-based Resolved 2013-01-01 → 2013-01-31
MCL Health-based Resolved 2013-01-01 → 2013-01-31

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 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
Lead
0.0010 mg/L 6.7%
of the EPA limit 0.0150 mg/L
 17/17 LCR 2024
Copper
130 µg/L 10%
of the EPA limit 1300 µg/L
worst single sample: 180 µg/L
11/15 SYR4 2012–2018
Nitrate-Nitrite
445 µg/L 4.5%
of the EPA limit 10000 µg/L
worst single sample: 580 µg/L
10/13 SYR4 2012–2019
Arsenic
1 µg/L 10%
of the EPA limit 10 µg/L
 2/6 SYR4 2013–2017
Barium
387 µg/L 19%
of the EPA limit 2000 µg/L
worst single sample: 390 µg/L
2/2 SYR4 2013
Combined Uranium
2 µg/L 6.7%
of the EPA limit 30 µg/L
 2/2 SYR4 2016
Fluoride
166 µg/L 4.2%
of the EPA limit 4000 µg/L
worst single sample: 170 µg/L
2/2 SYR4 2013
Gross Alpha, Excl. Radon And U
2.88 pCi/L 19%
of the EPA limit 15 pCi/L
worst single sample: 2.9 pCi/L
2/2 SYR4 2016
Nitrate
20 µg/L 0.2%
of the EPA limit 10000 µg/L
 2/4 SYR4 2013
Combined Radium (-226 And -228)
0.9000 pCi/L 18%
of the EPA limit 5 pCi/L
 1/2 SYR4 2016
Lead
2 µg/L 13%
of the EPA limit 15 µg/L
 1/15 SYR4 2012–2018
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) PhthalateDibromochloromethaneDinosebEndrinEthylbenzeneHexachlorobenzeneHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorNitriteOxamylPentachlorophenolPicloramSeleniumSimazineStyreneTTHMTetrachloroethyleneThallium, TotalTolueneToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
SHIREY, HILARY
Phone
406-253-7862
Email
[email protected]

Frequently asked questions about Flathead County Water Dist 101

Is Flathead County Water Dist 101 tap water safe to drink?

EPA monitoring detected 11 contaminants in Flathead County Water Dist 101'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 Flathead County Water Dist 101's water?

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

How many people does Flathead County Water Dist 101 serve?

Flathead County Water Dist 101 reports serving 210 people in Montana, per its EPA record.

Has Flathead County Water Dist 101 had any water quality violations?

The EPA has 712 violations on file for Flathead County Water Dist 101, of which 49 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.