Chromium-6 in Rohnert Park, CA Drinking Water
Chromium-6 data for Rohnert Park, California · 54,959 residents · 3 ZIP codes
Water quality records for Rohnert Park, California show Chromium-6 detections on file — a finding that places it among the contaminants worth tracking for this area.
Data: EPA SDWIS, CCR Reports, ECHO Last verified: 2026-05-14
Chromium-6 in Rohnert Park Tap Water
Chromium-6 has been detected in Rohnert Park, California drinking water at a maximum level of 580 ppb — 5.8x the EPA MCL.
This analysis covers 54,959 residents across 3 ZIP codes in Rohnert Park.
Rohnert Park's overall water quality grade is A (94/100).
Is Chromium-6 in Rohnert Park 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.
Chromium-6 Levels by ZIP Code
| ZIP Code | Chromium-6 Level | EPA Limit | Status |
|---|---|---|---|
| 94926 | 580 ppb | 100 ppb (total chromium MCL) | Exceeds limit |
| 94927 | 580 ppb | 100 ppb (total chromium MCL) | Exceeds limit |
| 94928 | 580 ppb | 100 ppb (total chromium MCL) | Exceeds limit |
Average chromium-6 level across Rohnert Park: 580 ppb
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 Rohnert Park 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.