Copper in Cary, NC Drinking Water
Copper data for Cary, North Carolina · 167,694 residents · 5 ZIP codes
ZipCheckup's reading of Copper in Cary, North Carolina: the highest detected level is 1595 ppb; the EPA limit is 1.3 mg/L (action level). Copper carries a moderate health-risk designation.
People in Cary, North Carolina who get water from the public supply are among residents whose systems have returned Copper detections in EPA compliance testing.
Data: EPA SDWIS, CCR Reports, ECHO Last verified: 2026-07-13
Copper in Cary Tap Water
Copper has been detected in Cary, North Carolina drinking water at a maximum level of 1595 ppb — 1.23x the EPA action level.
This analysis covers 167,694 residents across 5 ZIP codes in Cary.
Cary's overall water quality grade is C (63/100).
Is Copper in Cary Water Safe?
If you live in an affected ZIP code, consider installing a reverse osmosis or nsf 53 carbon block filter certified under NSF 53 and testing your water independently.
Copper Levels by ZIP Code
| ZIP Code | Copper Level | EPA Limit | Status |
|---|---|---|---|
| 27511 | 1595 ppb | 1.3 mg/L (action level) | Exceeds limit |
| 27512 | 1595 ppb | 1.3 mg/L (action level) | Exceeds limit |
| 27513 | 1595 ppb | 1.3 mg/L (action level) | Exceeds limit |
| 27518 | 1595 ppb | 1.3 mg/L (action level) | Exceeds limit |
| 27519 | 1595 ppb | 1.3 mg/L (action level) | Exceeds limit |
Average copper level across Cary: 1595 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 Cary 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.