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Tap water quality report

Elmo Water

EPA monitoring tested this supplier for 75 contaminants and detected 10. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

75
contaminants tested
10
detected
220
people served
4
health-based violations
Montana rankingsLead in MontanaPFAS in Montana
Water source
Ground water
Ownership
Native American

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.

4
health-based violations
14
violations on file
0
still open
ViolationTypeStatusPeriod
MCL Health-based Resolved 2015-12-01 → 2015-12-31
MCL Health-based Resolved 2015-09-01 → 2015-09-30
MCL Health-based Archived 2000-09-01 → 2000-09-30
MCL Health-based Archived 1994-10-01 → 1994-10-31
MR Monitoring Resolved 2023-10-01
MR Monitoring Resolved 2020-01-01 → 2022-12-31
MR Monitoring Resolved 2020-01-01 → 2022-12-31
MR Monitoring Resolved 2020-01-01 → 2022-12-31
MR Monitoring Resolved 2020-01-01 → 2022-12-31
MR Monitoring Archived 2000-09-01 → 2000-09-30

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.
ContaminantLevel vs EPA limitDetection rateSourcePeriod
Lead
0.0040 mg/L 27%
of the EPA limit 0.0150 mg/L
 10/10 LCR 2024
Nitrate-Nitrite
584 µg/L 5.8%
of the EPA limit 10000 µg/L
worst single sample: 640 µg/L
8/8 SYR4 2012–2019
Copper
74 µg/L 5.7%
of the EPA limit 1300 µg/L
worst single sample: 80 µg/L
5/5 SYR4 2017
Nitrate
440 µg/L 4.4%
of the EPA limit 10000 µg/L
 4/4 SYR4 2017–2018
Combined Uranium
4 µg/L 13%
of the EPA limit 30 µg/L
 3/3 SYR4 2013–2016
Arsenic
2 µg/L 20%
of the EPA limit 10 µg/L
 1/1 SYR4 2018
Barium
170 µg/L 8.5%
of the EPA limit 2000 µg/L
 1/1 SYR4 2018
Fluoride
230 µg/L 5.8%
of the EPA limit 4000 µg/L
 1/1 SYR4 2018
Gross Alpha, Excl. Radon And U
4.5 pCi/L 30%
of the EPA limit 15 pCi/L
 1/2 SYR4 2013–2016
Lead
4 µg/L 27%
of the EPA limit 15 µg/L
 1/5 SYR4 2017
65 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, TotalBromodichloromethaneBromoformChlorobenzeneCyanideCadmiumCarbofuranCarbon TetrachlorideChlordaneChloroformChromiumCombined Radium (-226 And -228)DichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDibromochloromethaneDinosebDiquatEthylene DibromideEndothallEndrinEthylbenzeneGlyphosateHexachlorobenzeneHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorNitriteOxamylPentachlorophenolPicloramSeleniumSimazineStyreneTTHMTetrachloroethyleneThallium, TotalTolueneTotal Polychlorinated Biphenyls (PCB)ToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
PHILLIPS, REBECCA
Phone
406-675-4491
Email
[email protected]

Frequently asked questions about Elmo Water

Is Elmo Water tap water safe to drink?

EPA monitoring detected 10 contaminants in Elmo Water'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 Elmo Water's water?

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

How many people does Elmo Water serve?

Elmo Water reports serving 220 people in Montana, per its EPA record.

Has Elmo Water had any water quality violations?

The EPA has 14 violations on file for Elmo Water, of which 4 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.