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Tap water quality report

Barnaby Lake Hoa

EPA monitoring tested this supplier for 68 contaminants and detected 9. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

68
contaminants tested
9
detected
75
people served
36
health-based violations
Montana rankingsLead in MontanaPFAS in Montana
Water source
Ground water
Ownership
Private
Counties served
Lincoln

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.

36
health-based violations
249
violations on file
0
still open
ViolationTypeStatusPeriod
MCL Health-based Resolved 2011-10-01 → 2011-10-31
MCL Health-based Resolved 2011-10-01 → 2011-10-31
MCL Health-based Resolved 2011-10-01 → 2011-10-31
MCL Health-based Resolved 2011-10-01 → 2011-10-31
MCL Health-based Resolved 2011-10-01 → 2011-10-31
MCL Health-based Resolved 2009-02-01 → 2009-02-28
MCL Health-based Resolved 2009-02-01 → 2009-02-28
MCL Health-based Resolved 2009-02-01 → 2009-02-28
MCL Health-based Resolved 2009-02-01 → 2009-02-28
MCL Health-based Resolved 2009-02-01 → 2009-02-28

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
 13/13 LCR 2019
Arsenic
5 µg/L 50%
of the EPA limit 10 µg/L
 6/6 SYR4 2013–2019
Fluoride
217.5 µg/L 5.4%
of the EPA limit 4000 µg/L
worst single sample: 220 µg/L
6/6 SYR4 2013–2019
Nitrate-Nitrite
254 µg/L 2.5%
of the EPA limit 10000 µg/L
worst single sample: 300 µg/L
5/16 SYR4 2012–2019
Barium
455.5 µg/L 23%
of the EPA limit 2000 µg/L
worst single sample: 460 µg/L
4/6 SYR4 2013–2019
Nitrate
70 µg/L 0.7%
of the EPA limit 10000 µg/L
 4/12 SYR4 2013–2019
Copper
60 µg/L 4.6%
of the EPA limit 1300 µg/L
 3/10 SYR4 2014–2017
Combined Radium (-226 And -228)
2.18 pCi/L 44%
of the EPA limit 5 pCi/L
worst single sample: 2.2 pCi/L
2/2 SYR4 2013
Gross Alpha, Excl. Radon And U
3.3 pCi/L 22%
of the EPA limit 15 pCi/L
 1/2 SYR4 2013
59 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 TetrachlorideChlordaneChloroformChromiumCombined UraniumDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDibromochloromethaneDinosebEndrinEthylbenzeneHexachlorobenzeneHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoLeadMercuryMethoxychlorNitriteOxamylPentachlorophenolPicloramSeleniumSimazineStyreneTTHMTetrachloroethyleneThallium, TotalTolueneToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
BARNABY LAKE HOA
Phone
406-882-4859

Frequently asked questions about Barnaby Lake Hoa

Is Barnaby Lake Hoa tap water safe to drink?

EPA monitoring detected 9 contaminants in Barnaby Lake Hoa'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 Barnaby Lake Hoa's water?

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

How many people does Barnaby Lake Hoa serve?

Barnaby Lake Hoa reports serving 75 people in Montana, per its EPA record.

Has Barnaby Lake Hoa had any water quality violations?

The EPA has 249 violations on file for Barnaby Lake Hoa, of which 36 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.