Arsenic in Clovis, CA Drinking Water
Arsenic data for Clovis, California · 137,802 residents · 4 ZIP codes
ZipCheckup's reading of Arsenic in Clovis, California: Arsenic carries a high health-risk designation.
Arsenic exposure in drinking water is tracked by EPA across the country; households in Clovis, California are among those with confirmed detections in the public water record.
Data: EPA SDWIS, CCR Reports, ECHO Last verified: 2026-07-13
Arsenic in Clovis Tap Water
Clovis, California has 32 EPA violations related to arsenic in drinking water.
This analysis covers 137,802 residents across 4 ZIP codes in Clovis.
Clovis's overall water quality grade is B (71/100).
Is Arsenic in Clovis Water Safe?
If you live in an affected ZIP code, consider installing a reverse osmosis filter certified under NSF 53 / NSF 58 and testing your water independently.
EPA Violations for Arsenic in Clovis
| Date | Violation Type | Status | ZIP Code |
|---|---|---|---|
| 2025-07-01 | Arsenic (Known) | Known | 93611 |
| 2025-07-01 | Arsenic (Known) | Known | 93612 |
| 2025-07-01 | Arsenic (Known) | Known | 93613 |
| 2025-07-01 | Arsenic (Known) | Known | 93619 |
| 2025-04-01 | Arsenic (Known) | Known | 93611 |
| 2025-04-01 | Arsenic (Known) | Known | 93612 |
| 2025-04-01 | Arsenic (Known) | Known | 93613 |
| 2025-04-01 | Arsenic (Known) | Known | 93619 |
| 2025-01-01 | Arsenic (Known) | Known | 93611 |
| 2025-01-01 | Arsenic (Known) | Known | 93612 |
| 2025-01-01 | Arsenic (Known) | Known | 93613 |
| 2025-01-01 | Arsenic (Known) | Known | 93619 |
| 2024-10-01 | Arsenic (Known) | Known | 93611 |
| 2024-10-01 | Arsenic (Known) | Known | 93612 |
| 2024-10-01 | Arsenic (Known) | Known | 93613 |
| 2024-10-01 | Arsenic (Known) | Known | 93619 |
| 2024-07-01 | Arsenic (Known) | Known | 93611 |
| 2024-07-01 | Arsenic (Known) | Known | 93612 |
| 2024-07-01 | Arsenic (Known) | Known | 93613 |
| 2024-07-01 | Arsenic (Known) | Known | 93619 |
| ... | 12 more violations |
Health Effects of Arsenic
- Increased risk of skin, bladder, lung, and kidney cancer
- Cardiovascular disease and type 2 diabetes
- Skin changes (darkening, thickening, lesions)
- Developmental effects in children exposed in utero
Health risk severity: High. Governed by the Arsenic Rule (2006).
How Arsenic Gets Into Drinking Water
- Natural deposits in rock and soil (especially in western U.S.)
- Runoff from orchards and glass/electronics production
- Historical use of arsenic-based pesticides
- Well water in areas with arsenic-rich geology
What to Do About Arsenic in Clovis Water
- Install a reverse osmosis (RO) system certified under NSF 58
- Adsorptive media filters (iron-based) can also reduce arsenic
- Have well water tested if on a private supply
- Boiling water does NOT remove arsenic — it concentrates it
Look for filters certified under NSF 53 / NSF 58 for arsenic removal.