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Tap water quality report

Turtle Lake Water

EPA monitoring tested this supplier for 75 contaminants and detected 8. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

75
contaminants tested
8
detected
225
people served
22
health-based violations
Montana rankingsLead in MontanaPFAS in Montana
Water source
Ground water
Ownership
Native American

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.

22
health-based violations
32
violations on file
0
still open
ViolationTypeStatusPeriod
MCL Health-based Resolved 2021-06-01 → 2021-06-30
MCL Health-based Resolved 2021-06-01 → 2021-06-30
MCL Health-based Resolved 2021-06-01 → 2021-06-30
MCL Health-based Resolved 2014-09-01 → 2014-09-30
MCL Health-based Resolved 2010-08-01 → 2010-08-31
MCL Health-based Resolved 2010-08-01 → 2010-08-31
MCL Health-based Resolved 2004-12-01 → 2004-12-31
MCL Health-based Resolved 2004-12-01 → 2004-12-31
MCL Health-based Resolved 2004-12-01 → 2004-12-31
MCL Health-based Resolved 2004-12-01 → 2004-12-31

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 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
0.0 mg/L 0%
of the EPA limit 0.0150 mg/L
 12/12 LCR 2025
Nitrate-Nitrite
626.5 µg/L 6.3%
of the EPA limit 10000 µg/L
worst single sample: 630 µg/L
8/8 SYR4 2012–2019
Copper
130 µg/L 10%
of the EPA limit 1300 µg/L
 5/5 SYR4 2017
Nitrate
630 µg/L 6.3%
of the EPA limit 10000 µg/L
 4/4 SYR4 2017–2018
Barium
100 µg/L 5%
of the EPA limit 2000 µg/L
 1/1 SYR4 2018
Combined Radium (-226 And -228)
2.1 pCi/L 42%
of the EPA limit 5 pCi/L
 1/1 SYR4 2016
Fluoride
300 µg/L 7.5%
of the EPA limit 4000 µg/L
 1/1 SYR4 2018
TTHM
0.6700 µg/L 0.8%
of the EPA limit 80 µg/L
 1/4 SYR4 2013–2018
67 contaminants tested, none detected
1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-DIBROMO-3-CHLOROPROPANE1,2-Dichloroethane1,2-Dichloropropane2,4,5-TP2,4-DAntimony, TotalArsenicAtrazineBhc-GammaBenzeneBenzo(A)PyreneBeryllium, TotalBromodichloromethaneBromoformChlorobenzeneCyanideCadmiumCarbofuranCarbon TetrachlorideChlordaneChloroformChromiumCombined UraniumDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDibromochloromethaneDinosebDiquatEthylene DibromideEndothallEndrinEthylbenzeneGlyphosateGross Alpha, Excl. Radon And UHexachlorobenzeneHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoLeadMercuryMethoxychlorNitriteOxamylPentachlorophenolPicloramSeleniumSimazineStyreneTetrachloroethyleneThallium, TotalTolueneTotal Polychlorinated Biphenyls (PCB)ToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
PHILLIPS, REBECCA
Phone
406-675-4491
Email
[email protected]

Frequently asked questions about Turtle Lake Water

Is Turtle Lake Water tap water safe to drink?

EPA monitoring detected 8 contaminants in Turtle Lake 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 Turtle Lake Water's water?

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

How many people does Turtle Lake Water serve?

Turtle Lake Water reports serving 225 people in Montana, per its EPA record.

Has Turtle Lake Water had any water quality violations?

The EPA has 32 violations on file for Turtle Lake Water, of which 22 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.