Is Masonic Home of Montana Tap Water Safe? Quality Report

Water source: Ground water
Ownership: Private
Counties served: Lewis and Clark

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.

health-based violations

violations on file

still open

Violation	Type	Status	Period
MCL	Health-based	Resolved	1999-06-01 → 1999-06-30
MCL	Health-based	Resolved	1999-06-01 → 1999-06-30
MR	Monitoring	Resolved	2021-12-30
MR	Monitoring	Resolved	2021-12-30
Other	Monitoring	Resolved	2020-07-01
Other	Monitoring	Resolved	2020-07-01
MON	Monitoring	Resolved	2019-09-01 → 2019-09-30
MON	Monitoring	Resolved	2019-09-01 → 2019-09-30
MON	Monitoring	Resolved	2019-09-01 → 2019-09-30
MON	Monitoring	Resolved	2019-09-01 → 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.

Contaminant	Level vs EPA limit	Detection rate	Source	Period
Copper	81.9 µg/L 6.3% of the EPA limit 1300 µg/L worst single sample: 105 µg/L	15/15	SYR4	2014–2018
Lead	0.0060 mg/L 40% of the EPA limit 0.0150 mg/L	13/13	LCR	2027
Nitrate-Nitrite	1596.5 µg/L 16% of the EPA limit 10000 µg/L worst single sample: 1600 µg/L	8/8	SYR4	2012–2019
Bromoform	4.084 µg/L No EPA limit set worst single sample: 4.23 µg/L	5/6	SYR4	2013–2019
Arsenic	1.9 µg/L 19% of the EPA limit 10 µg/L worst single sample: 2 µg/L	3/3	SYR4	2013–2018
Barium	78.9 µg/L 3.9% of the EPA limit 2000 µg/L worst single sample: 79 µg/L	3/3	SYR4	2013–2018
Dibromochloromethane	1.913 µg/L No EPA limit set worst single sample: 1.99 µg/L	3/6	SYR4	2013–2019
Selenium	2 µg/L 4% of the EPA limit 50 µg/L	3/3	SYR4	2013–2018
TTHM	6.219 µg/L 7.8% of the EPA limit 80 µg/L worst single sample: 6.27 µg/L	3/3	SYR4	2013–2019
Fluoride	109.7 µg/L 2.7% of the EPA limit 4000 µg/L worst single sample: 110 µg/L	2/3	SYR4	2013–2018
Nitrate	1520 µg/L 15% of the EPA limit 10000 µg/L	2/2	SYR4	2017
Total Haloacetic Acids (HAA5)	1.7395 µg/L 2.9% of the EPA limit 60 µg/L worst single sample: 1.77 µg/L	2/3	SYR4	2013–2019
Bromodichloromethane	0.6500 µg/L No EPA limit set	1/6	SYR4	2013–2019
Combined Radium (-226 And -228)	0.9000 pCi/L 18% of the EPA limit 5 pCi/L	1/1	SYR4	2018
Combined Uranium	2 µg/L 6.7% of the EPA limit 30 µg/L	1/1	SYR4	2018
Dibromoacetic Acid	1.16 µg/L No EPA limit set	1/3	SYR4	2013–2019
Dichloroacetic Acid	1.02 µg/L No EPA limit set	1/3	SYR4	2013–2019
Gross Alpha, Excl. Radon And U	2 pCi/L 13% of the EPA limit 15 pCi/L	1/1	SYR4	2018
Lead	5 µg/L 33% of the EPA limit 15 µg/L	1/15	SYR4	2014–2018
Monobromoacetic Acid	0.7500 µg/L No EPA limit set	1/3	SYR4	2013–2019

55 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, TotalChlorobenzeneCadmiumCarbofuranCarbon TetrachlorideChlordaneChloroformChromiumDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDinosebEndrinEthylbenzeneHexachlorobenzeneHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorMonochloroacetic AcidNitriteOxamylPentachlorophenolPicloramSimazineStyreneTetrachloroethyleneThallium, TotalTolueneTotal Polychlorinated Biphenyls (PCB)ToxapheneTrichloroacetic AcidTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact: ROCKY MOUNTAIN OPERATIONS
Phone: 406-442-2949
Email: [email protected]

Frequently asked questions about Masonic Home of Montana

Is Masonic Home of Montana tap water safe to drink?

EPA monitoring detected 20 contaminants in Masonic Home of Montana'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 Masonic Home of Montana's water?

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

How many people does Masonic Home of Montana serve?

Masonic Home of Montana reports serving 90 people in Montana, per its EPA record.

Has Masonic Home of Montana had any water quality violations?

The EPA has 95 violations on file for Masonic Home of Montana, of which 2 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.