Chromium-6 in Watsonville, CA Drinking Water
Chromium-6 data for Watsonville, California · 67,320 residents · 2 ZIP codes
Over the past reporting period, water systems in Watsonville, California have recorded Chromium-6 at detectable concentrations in EPA compliance samples.
Data: EPA SDWIS, CCR Reports, ECHO Last verified: 2026-05-14
Chromium-6 in Watsonville Tap Water
Chromium-6 has been detected in Watsonville, California drinking water at a maximum level of 196.3 ppb — 1.96x the EPA MCL.
This analysis covers 67,320 residents across 2 ZIP codes in Watsonville.
Watsonville's overall water quality grade is B (76/100).
Is Chromium-6 in Watsonville Water Safe?
Chromium-6 was detected in Watsonville water but currently falls within EPA limits. However, some health organizations argue the EPA MCL may not be protective enough.
If you are concerned, a reverse osmosis or strong-base anion exchange filter can reduce chromium-6 levels further.
Chromium-6 Levels by ZIP Code
| ZIP Code | Chromium-6 Level | EPA Limit | Status |
|---|---|---|---|
| 95076 | 196.3 ppb | 100 ppb (total chromium MCL) | Exceeds limit |
| 95077 | 196.3 ppb | 100 ppb (total chromium MCL) | Exceeds limit |
| 95076 | 8.9 ppb | 100 ppb (total chromium MCL) | OK |
| 95077 | 8.9 ppb | 100 ppb (total chromium MCL) | OK |
Average chromium-6 level across Watsonville: 102.6 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 Watsonville 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.