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Tap water quality report

Overlook Subdivision

EPA monitoring tested this supplier for 68 contaminants and detected 10. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

68
contaminants tested
10
detected
49
people served
10
health-based violations
Montana rankingsLead in MontanaPFAS in Montana
Water source
Ground water
Ownership
Private
Counties served
Lake

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.

10
health-based violations
135
violations on file
0
still open
ViolationTypeStatusPeriod
MCL Health-based Resolved 2016-07-01 → 2016-07-31
MCL Health-based Resolved 2016-07-01 → 2016-07-31
MCL Health-based Resolved 2016-07-01 → 2016-07-31
MCL Health-based Resolved 2016-07-01 → 2016-07-31
MCL Health-based Resolved 2016-07-01 → 2016-07-31
MCL Health-based Resolved 2014-12-01 → 2014-12-31
MCL Health-based Resolved 2014-12-01 → 2014-12-31
MCL Health-based Resolved 2014-12-01 → 2014-12-31
MCL Health-based Resolved 2014-12-01 → 2014-12-31
MCL Health-based Resolved 2014-12-01 → 2014-12-31

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
 13/13 LCR 2017
Copper
222 µg/L 17%
of the EPA limit 1300 µg/L
worst single sample: 230 µg/L
9/10 SYR4 2014–2017
Nitrate-Nitrite
361 µg/L 3.6%
of the EPA limit 10000 µg/L
worst single sample: 460 µg/L
7/7 SYR4 2012–2019
Barium
110 µg/L 5.5%
of the EPA limit 2000 µg/L
 2/2 SYR4 2016–2019
Fluoride
538.5 µg/L 13%
of the EPA limit 4000 µg/L
worst single sample: 540 µg/L
2/2 SYR4 2016–2019
Nitrate
130 µg/L 1.3%
of the EPA limit 10000 µg/L
 2/2 SYR4 2019
Combined Radium (-226 And -228)
2.4 pCi/L 48%
of the EPA limit 5 pCi/L
 1/1 SYR4 2016
Combined Uranium
4 µg/L 13%
of the EPA limit 30 µg/L
 1/1 SYR4 2016
Gross Alpha, Excl. Radon And U
3.4 pCi/L 23%
of the EPA limit 15 pCi/L
 1/1 SYR4 2016
Toluene
4.6 µg/L 0.5%
of the EPA limit 1000 µg/L
 1/3 SYR4 2012–2019
58 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 TetrachlorideChlordaneChloroformChromiumDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDibromochloromethaneDinosebEndrinEthylbenzeneHexachlorobenzeneHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoLeadMercuryMethoxychlorNitriteOxamylPentachlorophenolPicloramSeleniumSimazineStyreneTTHMTetrachloroethyleneThallium, TotalToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
CLARK, SCOTT
Phone
503-504-2251

Frequently asked questions about Overlook Subdivision

Is Overlook Subdivision tap water safe to drink?

EPA monitoring detected 10 contaminants in Overlook Subdivision'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 Overlook Subdivision's water?

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

How many people does Overlook Subdivision serve?

Overlook Subdivision reports serving 49 people in Montana, per its EPA record.

Has Overlook Subdivision had any water quality violations?

The EPA has 135 violations on file for Overlook Subdivision, of which 10 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.