Hardin, Montana Water Quality Report
Water quality data for 3 water systems serving 3,600 people.
Water Source
Detected Contaminants
| Contaminant | Detected Level | EPA Limit (MCL) | Health Guideline | % of Limit | Status |
|---|---|---|---|---|---|
| lithium | 33.0 | No federal limit | 10.0 ug/L(EPA/USGS HBSL) | 330% | Above guideline |
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Compliance & Violations
Active Violations (51)
72
Oct 1, 2025
71
Jul 1, 2025
52
Oct 1, 2024
72
Oct 1, 2024
52
Oct 1, 2024
71
Jul 1, 2024
72
Oct 1, 2023
71
Jul 1, 2023
72
Oct 1, 2019
72
Oct 1, 2019
72
Oct 1, 2019
72
Oct 1, 2019
72
Oct 1, 2019
72
Oct 1, 2019
72
Oct 1, 2019
71
Jul 1, 2019
71
Jul 1, 2019
71
Jul 1, 2019
71
Jul 1, 2019
71
Jul 1, 2019
71
Jul 1, 2019
71
Jul 1, 2019
71
Jul 1, 2018
71
Jul 1, 2018
71
Jul 1, 2018
71
Jul 1, 2018
71
Jul 1, 2018
72
Oct 1, 2017
72
Oct 1, 2017
72
Oct 1, 2017
72
Oct 1, 2017
72
Oct 1, 2017
72
Oct 1, 2017
72
Oct 1, 2017
71
Jul 1, 2017
71
Jul 1, 2017
71
Jul 1, 2017
71
Jul 1, 2017
71
Jul 1, 2017
72
Oct 1, 2016
72
Oct 1, 2016
72
Oct 1, 2016
72
Oct 1, 2016
72
Oct 1, 2016
71
Jul 1, 2016
71
Jul 1, 2016
71
Jul 1, 2016
71
Jul 1, 2016
71
Jul 1, 2016
71
Jul 1, 2016
71
Jul 1, 2016
Resolved Violations (449)
27
Apr 1, 2025 — Jun 30, 2025
27
Apr 1, 2025 — Jun 30, 2025
27
Apr 1, 2025 — Jun 30, 2025
27
Apr 1, 2025 — Jun 30, 2025
27
Apr 1, 2025 — Jun 30, 2025
+ 444 more resolved violations
Frequently Asked Questions
Is Hardin tap water safe to drink?
Hardin's water meets all EPA maximum contaminant levels. However, 1 contaminants were detected at various levels. Some residents may prefer additional filtration for peace of mind.
What contaminants are in Hardin tap water?
1 contaminants have been detected in Hardin's water supply across 3 water systems. See the full contaminant table above for details.
How can I improve my water quality in Hardin?
Install a water filter rated for the specific contaminants found in Hardin's water. See our filter recommendations above. You can also request your utility's Consumer Confidence Report for the most current test results.
Does Hardin have any water quality violations?
Yes, Hardin currently has 60 active violations. See the violations section above for details.