Kennewick, Washington Water Quality Report
Water quality data for 14 water systems serving 122,548 people.
Water Source
Detected Contaminants
| Contaminant | Detected Level | EPA Limit (MCL) | Health Guideline | % of Limit | Status |
|---|---|---|---|---|---|
| lithium | 9.4 | No federal limit | 10.0 ug/L(EPA/USGS HBSL) | 94% | Near guideline |
| PFBS | 0.006 | No federal limit | 2000.0 ug/L(EPA Health Advisory) | 0% | Below guideline |
| PFHxA | 0.006 | No federal limit | 1000.0 ug/L(EWG) | 0% | Below guideline |
| PFHxS | 0.011 | 0.010 ug/L | 0.001 ug/L(EWG) | 106% | Above limit |
| PFOA | 0.005 | 0.004 ug/L | 0.090 ug/L(EWG) | 115% | Above limit |
| PFOS | 0.011 | 0.004 ug/L | 0.300 ug/L(EWG) | 288% | Above limit |
| PFPeA | 0.007 | 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
Resolved Violations (500)
01
Jul 1, 2025 — Sep 30, 2025
71
Jul 1, 2025
71
Jul 1, 2025
01
Apr 1, 2025 — Jun 30, 2025
03
Jan 1, 2025 — Mar 31, 2025
+ 495 more resolved violations
Frequently Asked Questions
Is Kennewick tap water safe to drink?
Kennewick'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 Kennewick tap water?
7 contaminants have been detected in Kennewick's water supply across 14 water systems. See the full contaminant table above for details.
How can I improve my water quality in Kennewick?
Install a water filter rated for the specific contaminants found in Kennewick's water. See our filter recommendations above. You can also request your utility's Consumer Confidence Report for the most current test results.
Does Kennewick have any water quality violations?
Yes, Kennewick currently has 42 active violations. See the violations section above for details.