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Tap water quality report

Harlem City of

EPA monitoring tested this supplier for 63 contaminants and detected 19. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

63
contaminants tested
19
detected
820
people served
306
health-based violations
Montana rankingsLead in MontanaPFAS in Montana
Water source
Surface water
Ownership
Local government
Counties served
Blaine

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.

306
health-based violations
664
violations on file
4
still open
ViolationTypeStatusPeriod
MCL Health-based Archived 2026-01-01 → 2026-03-31
MCL Health-based Archived 2026-01-01 → 2026-03-31
MCL Health-based Archived 2026-01-01 → 2026-03-31
MCL Health-based Archived 2026-01-01 → 2026-03-31
MCL Health-based Archived 2026-01-01 → 2026-03-31
MCL Health-based Archived 2025-10-01 → 2025-12-31
MCL Health-based Archived 2025-10-01 → 2025-12-31
MCL Health-based Archived 2025-10-01 → 2025-12-31
MCL Health-based Archived 2025-10-01 → 2025-12-31
MCL Health-based Archived 2025-10-01 → 2025-12-31

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
Bromodichloromethane
42 µg/L
No EPA limit set
worst single sample: 46 µg/L
35/35 SYR4 2012–2019
Chloroform
128 µg/L
No EPA limit set
worst single sample: 136 µg/L
35/35 SYR4 2012–2019
Dibromochloromethane
20 µg/L
No EPA limit set
worst single sample: 21 µg/L
35/35 SYR4 2012–2019
TTHM
159.6 µg/L 200%
of the EPA limit, at the 95th percentile of samples — 80 µg/L
worst single sample: 168 µg/L
35/35 SYR4 2012–2019
Copper
261 µg/L 20%
of the EPA limit 1300 µg/L
worst single sample: 436 µg/L
29/30 SYR4 2012–2018
Dichloroacetic Acid
45.65 µg/L
No EPA limit set
worst single sample: 58 µg/L
28/28 SYR4 2012–2019
Total Haloacetic Acids (HAA5)
91.45 µg/L 152%
of the EPA limit, at the 95th percentile of samples — 60 µg/L
worst single sample: 98 µg/L
28/28 SYR4 2012–2019
Trichloroacetic Acid
45.65 µg/L
No EPA limit set
worst single sample: 56 µg/L
28/28 SYR4 2012–2019
Dibromoacetic Acid
3.75 µg/L
No EPA limit set
worst single sample: 5.4 µg/L
26/28 SYR4 2012–2019
Monochloroacetic Acid
4.65 µg/L
No EPA limit set
worst single sample: 5.3 µg/L
14/28 SYR4 2012–2019
Lead
0.0010 mg/L 6.7%
of the EPA limit 0.0150 mg/L
 13/13 LCR 2018
Bromoform
1.755 µg/L
No EPA limit set
worst single sample: 1.8 µg/L
10/35 SYR4 2012–2019
Lead
142 µg/L 947%
of the EPA limit, at the 95th percentile of samples — 15 µg/L
worst single sample: 212 µg/L
8/30 SYR4 2012–2018
Monobromoacetic Acid
1.065 µg/L
No EPA limit set
worst single sample: 1.1 µg/L
8/28 SYR4 2012–2019
Nitrate-Nitrite
210 µg/L 2.1%
of the EPA limit 10000 µg/L
 6/14 SYR4 2012–2019
Arsenic
2.8 µg/L 28%
of the EPA limit 10 µg/L
worst single sample: 3 µg/L
5/7 SYR4 2012–2019
Combined Radium (-226 And -228)
1.865 pCi/L 37%
of the EPA limit 5 pCi/L
worst single sample: 1.9 pCi/L
2/2 SYR4 2012–2018
Hexachlorocyclopentadiene
0.1580 µg/L 0.3%
of the EPA limit 50 µg/L
worst single sample: 0.1600 µg/L
2/5 SYR4 2013–2018
Combined Uranium
3 µg/L 10%
of the EPA limit 30 µg/L
 1/1 SYR4 2014
44 contaminants tested, none detected
1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-Dichloroethane1,2-Dichloropropane2,4,5-TP2,4-DAtrazineBhc-GammaBenzeneBenzo(A)PyreneChlorobenzeneCarbofuranCarbon TetrachlorideChlordaneDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDinosebEndrinEthylbenzeneGross Alpha, Excl. Radon And UHexachlorobenzeneHeptachlorHeptachlor EpoxideLassoMethoxychlorOxamylPentachlorophenolPicloramSimazineStyreneTetrachloroethyleneTolueneToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
GREEN, CHRIS
Phone
406-353-2361
Email
[email protected]

Frequently asked questions about Harlem City of

Is Harlem City of tap water safe to drink?

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

EPA monitoring detected Bromodichloromethane, Chloroform, Dibromochloromethane, TTHM, Copper, and others. The full list with the level and data source for each is above.

How many people does Harlem City of serve?

Harlem City of reports serving 820 people in Montana, per its EPA record.

Has Harlem City of had any water quality violations?

The EPA has 664 violations on file for Harlem City of, of which 306 are health-based (a contaminant limit or required treatment was breached) and 4 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.