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Tap water quality report

Elk Grove Water

EPA monitoring tested this supplier for 74 contaminants and detected 16. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

74
contaminants tested
16
detected
672
people served
5
health-based violations
Montana rankingsLead in MontanaPFAS in Montana
Water source
Ground water
Ownership
Private
Counties served
Gallatin

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.

5
health-based violations
16
violations on file
0
still open
ViolationTypeStatusPeriod
MCL Health-based Resolved 2008-09-01 → 2008-09-30
MCL Health-based Resolved 2008-09-01 → 2008-09-30
MCL Health-based Resolved 2008-09-01 → 2008-09-30
MCL Health-based Resolved 2008-09-01 → 2008-09-30
MCL Health-based Resolved 2008-09-01 → 2008-09-30
MR Monitoring Resolved 2019-04-01 → 2019-06-30
MR Monitoring Resolved 2019-04-01 → 2019-06-30
MR Monitoring Resolved 2019-04-01 → 2019-06-30
MR Monitoring Resolved 2004-10-01
MR Monitoring Resolved 2004-10-01

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
Copper
308.95 µg/L 24%
of the EPA limit 1300 µg/L
worst single sample: 347 µg/L
24/26 SYR4 2013–2019
Lead
6.79 µg/L 45%
of the EPA limit 15 µg/L
worst single sample: 9 µg/L
24/26 SYR4 2013–2019
Lead
0.0044 mg/L 29%
of the EPA limit 0.0150 mg/L
 13/13 LCR 2025
Nitrate-Nitrite
5980 µg/L 60%
of the EPA limit 10000 µg/L
worst single sample: 6130 µg/L
13/13 SYR4 2012–2019
Chloroform
8.31 µg/L
No EPA limit set
worst single sample: 8.8 µg/L
8/8 SYR4 2012–2019
TTHM
13.985 µg/L 17%
of the EPA limit 80 µg/L
worst single sample: 15 µg/L
8/8 SYR4 2012–2019
Bromodichloromethane
3.74 µg/L
No EPA limit set
worst single sample: 3.8 µg/L
7/8 SYR4 2012–2019
Dibromochloromethane
1.87 µg/L
No EPA limit set
worst single sample: 1.9 µg/L
7/8 SYR4 2012–2019
Dichloroacetic Acid
3.775 µg/L
No EPA limit set
worst single sample: 4 µg/L
6/6 SYR4 2014–2019
Total Haloacetic Acids (HAA5)
6.45 µg/L 11%
of the EPA limit 60 µg/L
worst single sample: 6.7 µg/L
6/6 SYR4 2014–2019
Trichloroacetic Acid
2.185 µg/L
No EPA limit set
worst single sample: 2.2 µg/L
4/6 SYR4 2014–2019
Barium
89.97 µg/L 4.5%
of the EPA limit 2000 µg/L
worst single sample: 90 µg/L
3/3 SYR4 2012–2017
Dibromoacetic Acid
0.5600 µg/L
No EPA limit set
 2/6 SYR4 2014–2019
Fluoride
148.45 µg/L 3.7%
of the EPA limit 4000 µg/L
worst single sample: 151 µg/L
2/3 SYR4 2012–2017
Nitrate
3300 µg/L 33%
of the EPA limit 10000 µg/L
 2/2 SYR4 2019
Arsenic
0.6400 µg/L 6.4%
of the EPA limit 10 µg/L
 1/3 SYR4 2012–2017
58 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, TotalBromoformChlorobenzeneCadmiumCarbofuranCarbon TetrachlorideChlordaneChromiumDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDinosebEthylene DibromideEndrinEthylbenzeneHexachlorobenzeneHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorMonobromoacetic AcidMonochloroacetic AcidNitriteOxamylPentachlorophenolPicloramSeleniumSimazineStyreneTetrachloroethyleneThallium, TotalTolueneTotal Polychlorinated Biphenyls (PCB)ToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
ELLINGSON, AMY
Phone
406-585-4166
Email
[email protected]

Frequently asked questions about Elk Grove Water

Is Elk Grove Water tap water safe to drink?

EPA monitoring detected 16 contaminants in Elk Grove 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 Elk Grove Water's water?

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

How many people does Elk Grove Water serve?

Elk Grove Water reports serving 672 people in Montana, per its EPA record.

Has Elk Grove Water had any water quality violations?

The EPA has 16 violations on file for Elk Grove Water, of which 5 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.