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Tap water quality report

Eureka Town of

EPA monitoring tested this supplier for 69 contaminants and detected 16. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

69
contaminants tested
16
detected
1,995
people served
14
health-based violations
Montana rankingsLead in MontanaPFAS in Montana
Water source
Surface water
Ownership
Local government
Counties served
Lincoln

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.

14
health-based violations
74
violations on file
0
still open
ViolationTypeStatusPeriod
TT Health-based Resolved 2011-08-22
TT Health-based Resolved 2011-08-22
TT Health-based Resolved 2011-08-22
TT Health-based Resolved 2011-08-22
TT Health-based Resolved 2011-08-22
TT Health-based Resolved 2011-08-22
MCL Health-based Resolved 2009-03-01 → 2009-03-31
MCL Health-based Resolved 2009-03-01 → 2009-03-31
MCL Health-based Resolved 2009-03-01 → 2009-03-31
MCL Health-based Resolved 2009-03-01 → 2009-03-31

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
Copper
836 µg/L 64%
of the EPA limit 1300 µg/L
worst single sample: 1150 µg/L
78/80 SYR4 2012–2019
Lead
0.0010 mg/L 6.7%
of the EPA limit 0.0150 mg/L
 23/23 LCR 2024
Nitrate-Nitrite
730 µg/L 7.3%
of the EPA limit 10000 µg/L
 20/20 SYR4 2012–2019
Lead
11.75 µg/L 78%
of the EPA limit 15 µg/L
worst single sample: 20 µg/L
16/80 SYR4 2012–2019
Chloroform
20 µg/L
No EPA limit set
worst single sample: 30 µg/L
11/21 SYR4 2012–2019
TTHM
22.5 µg/L 28%
of the EPA limit 80 µg/L
worst single sample: 32 µg/L
11/21 SYR4 2012–2019
Bromodichloromethane
2.33 µg/L
No EPA limit set
worst single sample: 2.4 µg/L
8/21 SYR4 2012–2019
Dichloroacetic Acid
5.93 µg/L
No EPA limit set
worst single sample: 6 µg/L
8/8 SYR4 2012–2019
Total Haloacetic Acids (HAA5)
14.25 µg/L 24%
of the EPA limit 60 µg/L
worst single sample: 16 µg/L
8/8 SYR4 2012–2019
Trichloroacetic Acid
10.85 µg/L
No EPA limit set
worst single sample: 14 µg/L
8/8 SYR4 2012–2019
Arsenic
1 µg/L 10%
of the EPA limit 10 µg/L
 2/9 SYR4 2012–2019
Barium
223 µg/L 11%
of the EPA limit 2000 µg/L
worst single sample: 230 µg/L
2/2 SYR4 2012
Fluoride
126 µg/L 3.2%
of the EPA limit 4000 µg/L
worst single sample: 130 µg/L
2/2 SYR4 2012
Tetrachloroethylene
1.45 µg/L 29%
of the EPA limit 5 µg/L
worst single sample: 1.5 µg/L
2/13 SYR4 2012–2019
Dichloromethane
0.5400 µg/L 11%
of the EPA limit 5 µg/L
 1/13 SYR4 2012–2019
Toluene
0.9500 µg/L 0.1%
of the EPA limit 1000 µg/L
 1/13 SYR4 2012–2019
53 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, TotalBromoformChlorobenzeneCadmiumCarbofuranCarbon TetrachlorideChlordaneChromiumDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDibromoacetic AcidDibromochloromethaneDinosebEndrinEthylbenzeneHexachlorobenzeneHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorMonobromoacetic AcidMonochloroacetic AcidOxamylPentachlorophenolPicloramSeleniumSimazineStyreneThallium, TotalToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
FLYNN, KEVIN A
Phone
406-253-3852
Email
[email protected]

Frequently asked questions about Eureka Town of

Is Eureka Town of tap water safe to drink?

EPA monitoring detected 16 contaminants in Eureka Town of'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 Eureka Town of's water?

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

How many people does Eureka Town of serve?

Eureka Town of reports serving 1,995 people in Montana, per its EPA record.

Has Eureka Town of had any water quality violations?

The EPA has 74 violations on file for Eureka Town of, of which 14 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.