Arsenic in Gilbert, AZ Drinking Water
Arsenic data for Gilbert, Arizona · 248,286 residents · 7 ZIP codes
Federal water monitoring extends to thousands of public water systems, and in Gilbert, Arizona, that tracking has turned up Arsenic — the detection is logged in the EPA compliance record and reflects samples collected under routine Safe Drinking Water Act reporting requirements.
Data: EPA SDWIS, CCR Reports, ECHO Last verified: 2026-05-14
Arsenic in Gilbert Tap Water
Arsenic has been detected in Gilbert, Arizona drinking water at a maximum level of 5.8 ppb — below the EPA MCL of 10 ppb.
This analysis covers 248,286 residents across 7 ZIP codes in Gilbert.
Gilbert's overall water quality grade is B (70/100).
Is Arsenic in Gilbert 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.
Arsenic Levels by ZIP Code
| ZIP Code | Arsenic Level | EPA Limit | Status |
|---|---|---|---|
| 85233 | 5.8 ppb | 10 ppb | OK |
| 85234 | 5.8 ppb | 10 ppb | OK |
| 85295 | 5.8 ppb | 10 ppb | OK |
| 85296 | 5.8 ppb | 10 ppb | OK |
| 85297 | 5.8 ppb | 10 ppb | OK |
| 85298 | 5.8 ppb | 10 ppb | OK |
| 85299 | 5.8 ppb | 10 ppb | OK |
Average arsenic level across Gilbert: 5.8 ppb
EPA Violations for Arsenic in Gilbert
| Date | Violation Type | Status | ZIP Code |
|---|---|---|---|
| 2025-04-01 | Arsenic (Known) | Known | 85233 |
| 2025-04-01 | Arsenic (Known) | Known | 85234 |
| 2025-04-01 | Arsenic (Known) | Known | 85295 |
| 2025-04-01 | Arsenic (Known) | Known | 85296 |
| 2025-04-01 | Arsenic (Known) | Known | 85297 |
| 2025-04-01 | Arsenic (Known) | Known | 85298 |
| 2025-04-01 | Arsenic (Known) | Known | 85299 |
| 2025-01-01 | Arsenic (Known) | Known | 85233 |
| 2025-01-01 | Arsenic (Known) | Known | 85234 |
| 2025-01-01 | Arsenic (Known) | Known | 85295 |
| 2025-01-01 | Arsenic (Known) | Known | 85296 |
| 2025-01-01 | Arsenic (Known) | Known | 85297 |
| 2025-01-01 | Arsenic (Known) | Known | 85298 |
| 2025-01-01 | Arsenic (Known) | Known | 85299 |
| 2024-10-01 | Arsenic (Known) | Known | 85233 |
| 2024-10-01 | Arsenic (Known) | Known | 85234 |
| 2024-10-01 | Arsenic (Known) | Known | 85295 |
| 2024-10-01 | Arsenic (Known) | Known | 85296 |
| 2024-10-01 | Arsenic (Known) | Known | 85297 |
| 2024-10-01 | Arsenic (Known) | Known | 85298 |
| ... | 8 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 Gilbert 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.