Caldwell, Idaho Water Quality Report
Water quality data for 29 water systems serving 77,800 people.
Water Source
Detected Contaminants
| Contaminant | Detected Level | EPA Limit (MCL) | Health Guideline | % of Limit | Status |
|---|---|---|---|---|---|
| lithium | 16.0 | No federal limit | 10.0 ug/L(EPA/USGS HBSL) | 160% | Above guideline |
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Compliance & Violations
Active Violations (13)
75
Aug 15, 2025
4H
Jul 2, 2025
4H
Jul 2, 2025
52
Oct 1, 2024
52
Oct 1, 2024
52
Oct 1, 2024
52
Oct 1, 2024
66
Sep 29, 2024
66
Sep 29, 2024
75
May 10, 2024
75
May 10, 2024
66
Dec 30, 2023
66
Dec 30, 2023
Resolved Violations (487)
03
Jul 1, 2025 — Sep 30, 2025
02
Apr 1, 2025 — Jun 30, 2025
02
Apr 1, 2025 — Jun 30, 2025
02
Apr 1, 2025 — Jun 30, 2025
02
Apr 1, 2025 — Jun 30, 2025
+ 482 more resolved violations
Frequently Asked Questions
Is Caldwell tap water safe to drink?
Caldwell'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 Caldwell tap water?
1 contaminants have been detected in Caldwell's water supply across 29 water systems. See the full contaminant table above for details.
How can I improve my water quality in Caldwell?
Install a water filter rated for the specific contaminants found in Caldwell's water. See our filter recommendations above. You can also request your utility's Consumer Confidence Report for the most current test results.
Does Caldwell have any water quality violations?
Yes, Caldwell currently has 82 active violations. See the violations section above for details.