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Tap water quality report

Harlowton City of

EPA monitoring tested this supplier for 64 contaminants and detected 16. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

64
contaminants tested
16
detected
1,050
people served
6
health-based violations
Montana rankingsLead in MontanaPFAS in Montana
Water source
GWP
Ownership
Local government
Counties served
Wheatland

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.

6
health-based violations
117
violations on file
0
still open
ViolationTypeStatusPeriod
TT Health-based Resolved 1999-01-01
TT Health-based Resolved 1999-01-01
TT Health-based Resolved 1999-01-01
TT Health-based Resolved 1999-01-01
TT Health-based Resolved 1999-01-01
TT Health-based Resolved 1999-01-01
Other Monitoring Resolved 2025-07-01
Other Monitoring Resolved 2025-07-01
Other Monitoring Resolved 2024-10-01
Other Monitoring Resolved 2024-10-01

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
666.1 µg/L 51%
of the EPA limit 1300 µg/L
worst single sample: 915 µg/L
20/20 SYR4 2014–2017
Lead
0.0020 mg/L 13%
of the EPA limit 0.0150 mg/L
 18/18 LCR 2025
Lead
4.2 µg/L 28%
of the EPA limit 15 µg/L
worst single sample: 5 µg/L
17/20 SYR4 2014–2017
Bromodichloromethane
8.4 µg/L
No EPA limit set
worst single sample: 8.6 µg/L
11/20 SYR4 2012–2019
Chloroform
5.6 µg/L
No EPA limit set
 11/20 SYR4 2012–2019
Dibromoacetic Acid
2.85 µg/L
No EPA limit set
worst single sample: 2.9 µg/L
11/11 SYR4 2012–2019
Dibromochloromethane
9.1 µg/L
No EPA limit set
worst single sample: 9.4 µg/L
11/20 SYR4 2012–2019
Dichloroacetic Acid
3.25 µg/L
No EPA limit set
worst single sample: 3.6 µg/L
11/11 SYR4 2012–2019
TTHM
26 µg/L 33%
of the EPA limit 80 µg/L
worst single sample: 27 µg/L
11/20 SYR4 2012–2019
Total Haloacetic Acids (HAA5)
7.8 µg/L 13%
of the EPA limit 60 µg/L
worst single sample: 8 µg/L
11/11 SYR4 2012–2019
Trichloroacetic Acid
2.45 µg/L
No EPA limit set
worst single sample: 2.6 µg/L
11/11 SYR4 2012–2019
Nitrate-Nitrite
50 µg/L 0.5%
of the EPA limit 10000 µg/L
 10/48 SYR4 2012–2019
Bromoform
3.31 µg/L
No EPA limit set
worst single sample: 3.4 µg/L
7/20 SYR4 2012–2019
Combined Uranium
0.4000 µg/L 1.3%
of the EPA limit 30 µg/L
 1/6 SYR4 2012–2018
Gross Alpha, Excl. Radon And U
5.3 pCi/L 35%
of the EPA limit 15 pCi/L
 1/6 SYR4 2012–2018
Monobromoacetic Acid
0.5300 µg/L
No EPA limit set
 1/11 SYR4 2012–2019
48 contaminants tested, none detected
1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-Dichloroethane1,2-Dichloropropane2,4,5-TP2,4-DArsenicAsbestosAtrazineBhc-GammaBenzeneBenzo(A)PyreneChlorobenzeneCarbofuranCarbon TetrachlorideChlordaneCombined Radium (-226 And -228)DichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDinosebEndrinEthylbenzeneHexachlorobenzeneHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMethoxychlorMonochloroacetic AcidOxamylPentachlorophenolPicloramSimazineStyreneTetrachloroethyleneTolueneToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
LEACH, ANITA
Phone
406-632-5523
Email
[email protected]

Frequently asked questions about Harlowton City of

Is Harlowton City of tap water safe to drink?

EPA monitoring detected 16 contaminants in Harlowton 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 Harlowton City of's water?

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

How many people does Harlowton City of serve?

Harlowton City of reports serving 1,050 people in Montana, per its EPA record.

Has Harlowton City of had any water quality violations?

The EPA has 117 violations on file for Harlowton City of, of which 6 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.