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Tap water quality report

Clarks Lookout

EPA monitoring tested this supplier for 66 contaminants and detected 10. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

66
contaminants tested
10
detected
62
people served
139
health-based violations
Montana rankingsLead in MontanaPFAS in Montana
Water source
Ground water
Ownership
Private
Counties served
Beaverhead

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.

139
health-based violations
281
violations on file
0
still open
ViolationTypeStatusPeriod
MCL Health-based Resolved 2019-10-01 → 2019-12-31
MCL Health-based Resolved 2019-10-01 → 2019-12-31
MCL Health-based Resolved 2019-10-01 → 2019-12-31
MCL Health-based Resolved 2019-10-01 → 2019-12-31
MCL Health-based Resolved 2019-10-01 → 2019-12-31
MCL Health-based Resolved 2019-07-01 → 2019-09-30
MCL Health-based Resolved 2019-07-01 → 2019-09-30
MCL Health-based Resolved 2019-07-01 → 2019-09-30
MCL Health-based Resolved 2019-07-01 → 2019-09-30
MCL Health-based Resolved 2019-07-01 → 2019-09-30

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
Arsenic
24 µg/L 240%
of the EPA limit, at the 95th percentile of samples — 10 µg/L
worst single sample: 28 µg/L
82/128 SYR4 2012–2019
Nitrate-Nitrite
1862.5 µg/L 19%
of the EPA limit 10000 µg/L
worst single sample: 1920 µg/L
26/26 SYR4 2012–2019
Copper
37.6 µg/L 2.9%
of the EPA limit 1300 µg/L
worst single sample: 48 µg/L
17/25 SYR4 2012–2019
Combined Uranium
5 µg/L 17%
of the EPA limit 30 µg/L
 7/7 SYR4 2012–2019
Gross Alpha, Excl. Radon And U
11 pCi/L 73%
of the EPA limit 15 pCi/L
 7/7 SYR4 2012–2019
Lead
0.0 mg/L 0%
of the EPA limit 0.0150 mg/L
 7/7 LCR 2026
Fluoride
585 µg/L 15%
of the EPA limit 4000 µg/L
worst single sample: 600 µg/L
4/4 SYR4 2012–2019
Lead
2 µg/L 13%
of the EPA limit 15 µg/L
 4/25 SYR4 2012–2019
Selenium
1 µg/L 2%
of the EPA limit 50 µg/L
 2/4 SYR4 2012–2019
Combined Radium (-226 And -228)
4.3 pCi/L 86%
of the EPA limit 5 pCi/L
 1/5 SYR4 2012–2013
56 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-GammaBariumBenzeneBenzo(A)PyreneBeryllium, TotalBromodichloromethaneBromoformChlorobenzeneCadmiumCarbofuranCarbon TetrachlorideChlordaneChloroformChromiumDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDibromochloromethaneDinosebEndrinEthylbenzeneHexachlorobenzeneHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorOxamylPentachlorophenolPicloramSimazineStyreneTTHMTetrachloroethyleneThallium, TotalTolueneToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
REYES, JOSEPH
Phone
480-241-9541
Email
[email protected]

Frequently asked questions about Clarks Lookout

Is Clarks Lookout tap water safe to drink?

EPA monitoring detected 10 contaminants in Clarks Lookout'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 Clarks Lookout's water?

EPA monitoring detected Arsenic, Nitrate-Nitrite, Copper, Combined Uranium, Gross Alpha, Excl. Radon And U, and others. The full list with the level and data source for each is above.

How many people does Clarks Lookout serve?

Clarks Lookout reports serving 62 people in Montana, per its EPA record.

Has Clarks Lookout had any water quality violations?

The EPA has 281 violations on file for Clarks Lookout, of which 139 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.