Copper in Annandale, MN Drinking Water
Copper data for Annandale, Minnesota · 7,348 residents · 1 ZIP code
In Annandale, Minnesota, Copper has been detected in the public water supply — a contaminant that health agencies track because of documented effects associated with prolonged exposure at elevated concentrations.
Data: EPA SDWIS, CCR Reports, ECHO Last verified: 2026-06-04
Copper in Annandale Tap Water
Copper has been detected in Annandale, Minnesota drinking water at a maximum level of 0.84 ppb — below the EPA action level of 1.3 mg/L (action level).
This analysis covers 7,348 residents across 1 ZIP code in Annandale.
Annandale's overall water quality grade is C (65/100).
Is Copper in Annandale Water Safe?
Copper was detected in Annandale 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 |
|---|---|---|---|
| 55302 | 0.84 ppm | 1.3 mg/L (action level) | OK |
Average copper level across Annandale: 0.84 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 Annandale 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.