Exceeds EPA Limit Chromium-6 EXCEEDS EPA LIMIT

Chromium-6 in Sun Prairie, WI Drinking Water

Chromium-6 data for Sun Prairie, Wisconsin · 34,046 residents · 2 ZIP codes

In Sun Prairie, Wisconsin, Chromium-6 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.

100 ppb (total chromium MCL)
EPA MCL
2
EPA Violations
High
Health Risk
Reverse Osmosis or Strong-Base Anion Exchange
Best Filter Method

Data: EPA SDWIS, CCR Reports, ECHO Last verified: 2026-05-14

Chromium-6 in Sun Prairie Tap Water

Sun Prairie, Wisconsin has 2 EPA violations related to chromium-6 in drinking water.

This analysis covers 34,046 residents across 2 ZIP codes in Sun Prairie.

Sun Prairie's overall water quality grade is C (65/100).

Is Chromium-6 in Sun Prairie Water Safe?

Chromium-6 levels in parts of Sun Prairie exceed the EPA MCL of 100 ppb (total chromium MCL). The EPA requires water systems to take corrective action when this limit is exceeded.

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 Sun Prairie

Date Violation Type Status ZIP Code
2023-01-01 Chromium-6 (Resolved) Resolved 53590
2023-01-01 Chromium-6 (Resolved) Resolved 53596

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 Sun Prairie Water

  1. Reverse osmosis systems are most effective
  2. Strong-base anion exchange can reduce chromium-6
  3. Standard carbon filters are NOT effective for chromium-6
  4. Look for NSF 58 certification

Look for filters certified under NSF 58 for chromium-6 removal.

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