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Tap water quality report

Rocky Cliff Estates

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
140
people served
0
health-based violations
Montana rankingsLead in MontanaPFAS in Montana
Water source
Ground water
Ownership
Private
Counties served
Flathead

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.

0
health-based violations
78
violations on file
0
still open
ViolationTypeStatusPeriod
MON Monitoring Resolved 2025-05-01 → 2025-05-31
MON Monitoring Resolved 2025-05-01 → 2025-05-31
MON Monitoring Resolved 2025-05-01 → 2025-05-31
MON Monitoring Resolved 2017-11-01 → 2017-11-30
MON Monitoring Resolved 2017-11-01 → 2017-11-30
MON Monitoring Resolved 2017-11-01 → 2017-11-30
MR Monitoring Resolved 2008-10-01
MR Monitoring Resolved 2008-10-01
MR Monitoring Resolved 2008-10-01
MR Monitoring Resolved 2006-01-01 → 2006-12-31

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 single worst sample on record — over 100% is worth reading, but is not by itself a violation. Formal violations are listed separately.
ContaminantLevel vs EPA limitDetection rateSourcePeriod
Copper
340 µg/L 26%
of the EPA limit 1300 µg/L
 15/15 SYR4 2013–2019
Lead
0.0020 mg/L 13%
of the EPA limit 0.0150 mg/L
 11/11 LCR 2025
Nitrate-Nitrite
300 µg/L 3%
of the EPA limit 10000 µg/L
 8/8 SYR4 2012–2019
Lead
3 µg/L 20%
of the EPA limit 15 µg/L
 6/15 SYR4 2013–2019
Nitrate
290 µg/L 2.9%
of the EPA limit 10000 µg/L
 6/6 SYR4 2012–2019
Barium
60 µg/L 3%
of the EPA limit 2000 µg/L
 3/3 SYR4 2012–2019
Fluoride
210 µg/L 5.3%
of the EPA limit 4000 µg/L
 3/3 SYR4 2012–2019
Combined Uranium
3 µg/L 10%
of the EPA limit 30 µg/L
 2/2 SYR4 2013–2016
Gross Alpha, Excl. Radon And U
4.8 pCi/L 32%
of the EPA limit 15 pCi/L
 2/2 SYR4 2013–2016
Arsenic
1 µg/L 10%
of the EPA limit 10 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, TotalAtrazineBhc-GammaBenzeneBenzo(A)PyreneBeryllium, TotalBromodichloromethaneBromoformChlorobenzeneCadmiumCarbofuranCarbon TetrachlorideChlordaneChloroformChromiumCombined Radium (-226 And -228)DichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDibromochloromethaneDinosebEndrinEthylbenzeneHexachlorobenzeneHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorNitriteOxamylPentachlorophenolPicloramSeleniumSimazineStyreneTTHMTetrachloroethyleneThallium, TotalTolueneToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
HANSON AC, DANAE
Phone
406-257-1302

Frequently asked questions about Rocky Cliff Estates

Is Rocky Cliff Estates tap water safe to drink?

EPA monitoring detected 10 contaminants in Rocky Cliff Estates'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 Rocky Cliff Estates's water?

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

How many people does Rocky Cliff Estates serve?

Rocky Cliff Estates reports serving 140 people in Montana, per its EPA record.

Has Rocky Cliff Estates had any water quality violations?

The EPA has 78 violations on file for Rocky Cliff Estates, of which 0 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.