Arsenic in San Tan Valley, AZ Drinking Water
Arsenic data for San Tan Valley, Arizona · 98,772 residents · 2 ZIP codes
Because Arsenic is associated with health effects at sustained elevated exposures, residents in San Tan Valley, Arizona may find it useful that local water systems have returned detectable concentrations — facts that bear on long-term household water decisions.
Data: EPA SDWIS, CCR Reports, ECHO Last verified: 2026-05-14
Arsenic in San Tan Valley Tap Water
Arsenic has been detected in San Tan Valley, Arizona drinking water at a maximum level of 5.2 ppb — below the EPA MCL of 10 ppb.
This analysis covers 98,772 residents across 2 ZIP codes in San Tan Valley.
San Tan Valley's overall water quality grade is C (69/100).
Is Arsenic in San Tan Valley Water Safe?
Arsenic was detected in San Tan Valley 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 filter can reduce arsenic levels further.
Arsenic Levels by ZIP Code
Average arsenic level across San Tan Valley: 5.2 ppb
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 San Tan Valley 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.