How much copper is in Gray water?

The maximum detected level of copper in Gray water is 0.656 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 Gray, KY Drinking Water

Q: Is copper in Gray water safe?

Copper was detected in Gray water at 0.656 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 Gray, Kentucky · 16,065 residents · 1 ZIP code

Copper is regulated under the Safe Drinking Water Act because of its potential health effects at elevated concentrations; for residents of Gray, Kentucky, 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.

0.656 ppb

Max Level Detected

0.66 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: 2026-05-14

Copper in Gray Tap Water

Copper has been detected in Gray, Kentucky drinking water at a maximum level of 0.656 ppb — below the EPA action level of 1.3 mg/L (action level).

This analysis covers 16,065 residents across 1 ZIP code in Gray.

Gray's overall water quality grade is C (55/100).

Is Copper in Gray Water Safe?

Copper was detected in Gray 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
40734	0.656 ppm	1.3 mg/L (action level)	OK

Average copper level across Gray: 0.66 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 Gray 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.

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