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Tap water quality report

Stoney Brook Village Condominium Assoc

EPA monitoring tested this supplier for 66 contaminants and detected 9. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

66
contaminants tested
9
detected
142
people served
25
health-based violations
Montana rankingsLead in MontanaPFAS in Montana
Water source
Ground water
Ownership
Private
Counties served
Jefferson

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.

25
health-based violations
125
violations on file
0
still open
ViolationTypeStatusPeriod
MCL Health-based Resolved 2009-05-01 → 2009-05-31
MCL Health-based Resolved 2009-05-01 → 2009-05-31
MCL Health-based Resolved 2009-05-01 → 2009-05-31
MCL Health-based Resolved 2009-05-01 → 2009-05-31
MCL Health-based Resolved 2009-05-01 → 2009-05-31
MCL Health-based Resolved 2004-09-01 → 2004-09-30
MCL Health-based Resolved 2004-09-01 → 2004-09-30
MCL Health-based Resolved 2004-09-01 → 2004-09-30
MCL Health-based Resolved 2004-09-01 → 2004-09-30
MCL Health-based Resolved 2004-08-01 → 2004-08-31

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
Nitrate-Nitrite
1310 µg/L 13%
of the EPA limit 10000 µg/L
 18/18 SYR4 2012–2019
Copper
610.4 µg/L 47%
of the EPA limit 1300 µg/L
worst single sample: 623 µg/L
15/15 SYR4 2013–2019
Lead
0.0040 mg/L 27%
of the EPA limit 0.0150 mg/L
 14/14 LCR 2025
Lead
4.75 µg/L 32%
of the EPA limit 15 µg/L
worst single sample: 5 µg/L
6/15 SYR4 2013–2019
Arsenic
7 µg/L 70%
of the EPA limit 10 µg/L
 3/3 SYR4 2012–2019
Fluoride
926.7 µg/L 23%
of the EPA limit 4000 µg/L
worst single sample: 933 µg/L
3/3 SYR4 2012–2019
Barium
20.75 µg/L 1%
of the EPA limit 2000 µg/L
worst single sample: 21 µg/L
2/3 SYR4 2012–2019
Chromium
1 µg/L 1%
of the EPA limit 100 µg/L
 1/3 SYR4 2012–2019
Selenium
1 µg/L 2%
of the EPA limit 50 µg/L
 1/3 SYR4 2012–2019
57 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, TotalAtrazineBhc-GammaBenzeneBenzo(A)PyreneBeryllium, TotalBromodichloromethaneBromoformChlorobenzeneCadmiumCarbofuranCarbon TetrachlorideChlordaneChloroformDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDibromochloromethaneDinosebEthylene DibromideEndrinEthylbenzeneHexachlorobenzeneHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorOxamylPentachlorophenolPicloramSimazineStyreneTTHMTetrachloroethyleneThallium, TotalTolueneTotal Polychlorinated Biphenyls (PCB)ToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
KOMAC, ANN
Phone
406-439-0907

Frequently asked questions about Stoney Brook Village Condominium Assoc

Is Stoney Brook Village Condominium Assoc tap water safe to drink?

EPA monitoring detected 9 contaminants in Stoney Brook Village Condominium Assoc'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 Stoney Brook Village Condominium Assoc's water?

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

How many people does Stoney Brook Village Condominium Assoc serve?

Stoney Brook Village Condominium Assoc reports serving 142 people in Montana, per its EPA record.

Has Stoney Brook Village Condominium Assoc had any water quality violations?

The EPA has 125 violations on file for Stoney Brook Village Condominium Assoc, of which 25 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.