Chromium-6 in Madison, WI Drinking Water
Chromium-6 data for Madison, Wisconsin · 308,771 residents · 35 ZIP codes
Recent water testing in Madison, Wisconsin has returned Chromium-6 readings above detection thresholds.
Data: EPA SDWIS, CCR Reports, ECHO Last verified: 2026-06-04
Chromium-6 in Madison Tap Water
Madison, Wisconsin has 1 EPA violation related to chromium-6 in drinking water.
This analysis covers 308,771 residents across 35 ZIP codes in Madison.
Madison's overall water quality grade is C (60/100).
Is Chromium-6 in Madison Water Safe?
If you live in an affected ZIP code, consider installing a reverse osmosis or strong-base anion exchange filter certified under NSF 58 and testing your water independently.
EPA Violations for Chromium-6 in Madison
| Date | Violation Type | Status | ZIP Code |
|---|---|---|---|
| 2023-01-01 | Chromium-6 (Resolved) | Resolved | 53718 |
Health Effects of Chromium-6
- Stomach and intestinal cancer (likely carcinogen via ingestion)
- Known carcinogen when inhaled
- Liver and kidney damage
- Reproductive and developmental harm
Health risk severity: High. Governed by the National Primary Drinking Water Regulations.
How Chromium-6 Gets Into Drinking Water
- Industrial discharge from steel and pulp mills
- Natural erosion of chromium deposits
- Coal ash disposal sites
- Cooling tower discharge
What to Do About Chromium-6 in Madison Water
- Reverse osmosis systems are most effective
- Strong-base anion exchange can reduce chromium-6
- Standard carbon filters are NOT effective for chromium-6
- Look for NSF 58 certification
Look for filters certified under NSF 58 for chromium-6 removal.