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Tap water quality report

East Helena City of

EPA monitoring tested this supplier for 73 contaminants and detected 19. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

73
contaminants tested
19
detected
2,114
people served
3
health-based violations
Montana rankingsLead in MontanaPFAS in Montana
Water source
Ground water
Ownership
Local government
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.

3
health-based violations
37
violations on file
0
still open
ViolationTypeStatusPeriod
TT Health-based Resolved 2022-11-04
TT Health-based Resolved 2022-11-04
TT Health-based Resolved 2022-11-04
MON Monitoring Resolved 2025-06-01 → 2025-06-30
MON Monitoring Resolved 2025-06-01 → 2025-06-30
MON Monitoring Resolved 2025-06-01 → 2025-06-30
Other Monitoring Resolved 2021-07-01
Other Monitoring Resolved 2021-07-01
MR Monitoring Resolved 2015-12-30
MR Monitoring Resolved 2015-12-30

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
Nitrate-Nitrite
763.25 µg/L 7.6%
of the EPA limit 10000 µg/L
worst single sample: 863 µg/L
36/36 SYR4 2012–2019
Copper
797.55 µg/L 61%
of the EPA limit 1300 µg/L
worst single sample: 810 µg/L
30/30 SYR4 2012–2018
Lead
0.0010 mg/L 6.7%
of the EPA limit 0.0150 mg/L
 21/21 LCR 2025
TTHM
7.948 µg/L 9.9%
of the EPA limit 80 µg/L
worst single sample: 9.1 µg/L
13/17 SYR4 2013–2019
Lead
3 µg/L 20%
of the EPA limit 15 µg/L
 12/30 SYR4 2012–2018
Total Haloacetic Acids (HAA5)
4.63 µg/L 7.7%
of the EPA limit 60 µg/L
worst single sample: 5.4 µg/L
12/13 SYR4 2013–2019
Dibromochloromethane
1.9895 µg/L
No EPA limit set
worst single sample: 2.3 µg/L
10/17 SYR4 2013–2019
Bromodichloromethane
2.448 µg/L
No EPA limit set
worst single sample: 2.8 µg/L
9/17 SYR4 2013–2019
Dibromoacetic Acid
0.6580 µg/L
No EPA limit set
worst single sample: 0.7700 µg/L
9/13 SYR4 2013–2019
Chloroform
3.575 µg/L
No EPA limit set
worst single sample: 3.65 µg/L
7/17 SYR4 2013–2019
Dichloroacetic Acid
3.22 µg/L
No EPA limit set
worst single sample: 3.4 µg/L
5/13 SYR4 2013–2019
Trichloroacetic Acid
1.92 µg/L
No EPA limit set
worst single sample: 2 µg/L
5/13 SYR4 2013–2019
Fluoride
300 µg/L 7.5%
of the EPA limit 4000 µg/L
 4/5 SYR4 2012–2017
Barium
35.6 µg/L 1.8%
of the EPA limit 2000 µg/L
worst single sample: 36 µg/L
3/5 SYR4 2012–2017
Gross Alpha, Excl. Radon And U
1.485 pCi/L 9.9%
of the EPA limit 15 pCi/L
worst single sample: 1.5 pCi/L
2/2 SYR4 2017
Arsenic
1 µg/L 10%
of the EPA limit 10 µg/L
 1/9 SYR4 2012–2017
Bromoform
0.6200 µg/L
No EPA limit set
 1/17 SYR4 2013–2019
Combined Uranium
2 µg/L 6.7%
of the EPA limit 30 µg/L
 1/2 SYR4 2017
Selenium
1 µg/L 2%
of the EPA limit 50 µg/L
 1/5 SYR4 2012–2017
54 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, TotalAsbestosAtrazineBhc-GammaBenzeneBenzo(A)PyreneBeryllium, TotalChlorobenzeneCadmiumCarbofuranCarbon TetrachlorideChlordaneChromiumCombined Radium (-226 And -228)DichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDinosebEndrinEthylbenzeneHexachlorobenzeneHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorMonobromoacetic AcidMonochloroacetic AcidOxamylPentachlorophenolPicloramSimazineStyreneTetrachloroethyleneThallium, TotalTolueneToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
HARRIS, KELLY
Phone
406-227-5321
Email
[email protected]

Frequently asked questions about East Helena City of

Is East Helena City of tap water safe to drink?

EPA monitoring detected 19 contaminants in East Helena City 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 East Helena City of's water?

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

How many people does East Helena City of serve?

East Helena City of reports serving 2,114 people in Montana, per its EPA record.

Has East Helena City of had any water quality violations?

The EPA has 37 violations on file for East Helena City of, of which 3 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.