Boise, Idaho Water Quality Report
Water quality data for 64 water systems serving 296,948 people.
Water Source
Detected Contaminants
| Contaminant | Detected Level | EPA Limit (MCL) | Health Guideline | % of Limit | Status |
|---|---|---|---|---|---|
| lithium | 24.3 | No federal limit | 10.0 ug/L(EPA/USGS HBSL) | 243% | Above guideline |
| PFBS | 0.004 | No federal limit | 2000.0 ug/L(EPA Health Advisory) | 0% | Below guideline |
| PFHxA | 0.005 | No federal limit | 1000.0 ug/L(EWG) | 0% | Below guideline |
| PFHxS | 0.005 | 0.010 ug/L | 0.001 ug/L(EWG) | 55% | Within limit |
| PFNA | 0.051 | 0.010 ug/L | — | 510% | Above limit |
| PFOA | 0.006 | 0.004 ug/L | 0.090 ug/L(EWG) | 148% | Above limit |
| PFOS | 0.010 | 0.004 ug/L | 0.300 ug/L(EWG) | 245% | Above limit |
| PFPeA | 0.005 | No federal limit | 1000.0 ug/L(EWG) | 0% | Below guideline |
Recommended Water Filters
Based on the contaminants detected in your water supply, these filtration systems are recommended:
Reverse Osmosis (RO)
Reverse osmosis systems remove up to 99% of PFAS compounds. Recommended for homes with detected PFAS.
Up to 99% PFAS removal
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Compliance & Violations
Active Violations (27)
34
Sep 10, 2025
75
Sep 2, 2025
20
Aug 23, 2025
20
Aug 23, 2025
75
Aug 2, 2025
52
Jul 1, 2025
52
Jul 1, 2025
71
Jul 1, 2025
2C
May 2, 2025
2C
May 2, 2025
75
Jan 3, 2025
75
Jan 3, 2025
4G
Oct 17, 2024
2E
Oct 17, 2024
66
Dec 30, 2023
66
Dec 30, 2023
66
Dec 30, 2023
66
Dec 30, 2023
52
Oct 1, 2022
52
Oct 1, 2022
66
Dec 30, 2016
66
Dec 30, 2016
52
Jan 1, 2007
Violation
Unknown
Violation
Unknown
Violation
Unknown
Violation
Unknown
Resolved Violations (866)
3A
Sep 1, 2025 — Sep 30, 2025
27
Aug 1, 2025 — Aug 31, 2025
3A
Aug 1, 2025 — Aug 31, 2025
03
Jul 1, 2025 — Sep 30, 2025
27
Jul 1, 2025 — Jul 31, 2025
+ 861 more resolved violations
Frequently Asked Questions
Is Boise tap water safe to drink?
Boise's water has 3 contaminants detected above EPA limits. While the water is treated, residents may want to consider additional filtration.
What contaminants are in Boise tap water?
8 contaminants have been detected in Boise's water supply across 64 water systems. See the full contaminant table above for details.
How can I improve my water quality in Boise?
Install a water filter rated for the specific contaminants found in Boise's water. See our filter recommendations above. You can also request your utility's Consumer Confidence Report for the most current test results.
Does Boise have any water quality violations?
Yes, Boise currently has 218 active violations. See the violations section above for details.