Copper in Marshalltown, IA Drinking Water
Copper data for Marshalltown, Iowa · 31,163 residents · 1 ZIP code
Not every city shows Copper in its water data; in Marshalltown, Iowa, federal sampling has confirmed its presence at detectable levels in at least one recent reporting cycle.
Data: EPA SDWIS, CCR Reports, ECHO Last verified: 2026-04-05
Copper in Marshalltown Tap Water
Copper has been detected in Marshalltown, Iowa drinking water at a maximum level of 1.3 ppb — below the EPA action level of 1.3 mg/L (action level).
This analysis covers 31,163 residents across 1 ZIP code in Marshalltown.
Marshalltown's overall water quality grade is D (47/100).
Is Copper in Marshalltown Water Safe?
Copper was detected in Marshalltown 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 |
|---|---|---|---|
| 50158 | 1.3 ppm | 1.3 mg/L (action level) | OK |
Average copper level across Marshalltown: 1.3 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 Marshalltown 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.