How much copper is in Kennewick water?

The maximum detected level of copper in Kennewick water is 0.652 ppb. The EPA limit is 1.3 mg/L (action level). See the ZIP code table above for area-specific levels.

Detected Copper

Copper in Kennewick, WA Drinking Water

Q: Is copper in Kennewick water safe?

Copper was detected in Kennewick water at 0.652 ppb, below the EPA limit of 1.3 mg/L (action level). Check ZIP-level data on this page for your specific area.

Copper data for Kennewick, Washington · 103,495 residents · 3 ZIP codes

ZipCheckup's reading of Copper in Kennewick, Washington: the highest detected level is 0.652 ppb; the EPA limit is 1.3 mg/L (action level). Copper carries a moderate health-risk designation.

Copper is regulated under the Safe Drinking Water Act because of its potential health effects at elevated concentrations; for residents of Kennewick, Washington, the relevant fact is that it has shown up in recent EPA compliance samples - point-of-use filtration is one option residents research, alongside reviewing the utility's published treatment data.

0.652 ppb

Max Level Detected

0.65 ppb

Average Level

1.3 mg/L (action level)

EPA action level

Moderate

Health Risk

Reverse Osmosis or NSF 53 Carbon Block

Best Filter Method

Data: EPA SDWIS, CCR Reports, ECHO Last verified: 2026-07-13

Copper in Kennewick Tap Water

Copper has been detected in Kennewick, Washington drinking water at a maximum level of 0.652 ppm — below the EPA action level of 1.3 mg/L (action level).

This analysis covers 103,495 residents across 3 ZIP codes in Kennewick.

Kennewick's overall water quality grade is C (58/100).

Is Copper in Kennewick Water Safe?

Copper was detected in Kennewick water but currently falls within EPA limits. However, some health organizations argue the EPA action level may not be protective enough.

If you are concerned, a reverse osmosis or nsf 53 carbon block filter can reduce copper levels further.

Copper Levels by ZIP Code

ZIP Code	Copper Level	EPA Limit	Status
99336	0.652 ppm	1.3 mg/L (action level)	OK
99337	0.652 ppm	1.3 mg/L (action level)	OK
99338	0.652 ppm	1.3 mg/L (action level)	OK

Average copper level across Kennewick: 0.65 ppb

Health Effects of Copper

Nausea, vomiting, and diarrhea (short-term, high levels)
Liver and kidney damage (long-term)
Particularly dangerous for people with Wilson's disease
Infants are more sensitive than adults

Health risk severity: Moderate. Governed by the Lead and Copper Rule.

How Copper Gets Into Drinking Water

Corrosion of copper household plumbing
Acidic (low pH) water accelerates copper leaching
New copper pipes leach more than aged ones
Mining and industrial discharge (rare for tap water)

What to Do About Copper in Kennewick Water

Run water for 30-60 seconds before use (flushes stagnant water)
Install an NSF 53 or NSF 58 certified filter
If pH is low, consider a whole-home acid neutralizer
Test first-draw morning water to check actual copper levels

Look for filters certified under NSF 53 for copper removal.

Home → Contaminants → Copper → Washington → Kennewick

How to cite this page

APA ZipCheckup. (2026). Copper in Kennewick, WA Drinking Water. https://zipcheckup.com/contaminants/copper/kennewick-wa/

BibTeX

@misc{zipcheckup-contaminants-copper-kennewick-wa,
  author = {{ZipCheckup}},
  title  = {{Copper in Kennewick, WA Drinking Water}},
  year   = {2026},
  url    = {https://zipcheckup.com/contaminants/copper/kennewick-wa/}
}

Data as of July 2026.