Pinal County · Arizona · EPA SDWIS 2026Q2
Stanfield Water Quality
Is Stanfield tap water safe to drink?
Stanfield's public water is regulated to meet EPA legal limits. The EPA SDWIS record shows 5 contaminants on file, led by Nitrate. Local water is very hard. But meeting legal limits isn't the same as zero-risk. Our Water Score rates it 40/100. See the breakdown below, or pull a free water report to learn what's actually coming out of your tap.
What's really in Stanfield's water
Nitrate
Violation on record
58 EPA records on file (most recent 2025). Nitrate enters water mainly from fertilizer runoff, septic systems, and animal waste. High levels can interfere with the blood's ability to carry oxygen, a special danger for infants. Long-term low-level exposure has also been linked to elevated cancer risk in some studies.
Uranium
Violation on record
41 EPA records on file (most recent 2024). Uranium occurs naturally in rock and dissolves into groundwater, with extra contributions from mining in some regions. It is both a radioactive and a toxic metal; long-term exposure mainly damages the kidneys and increases cancer risk. It is widespread in Western groundwater.
Radium (combined -226 & -228)
Violation on record
1 EPA record on file (most recent 2011). Radium is a naturally radioactive element that leaches from rock into groundwater. Long-term exposure increases the risk of bone cancer and other cancers because it concentrates in bone. The federal limit covers the combined activity of radium-226 and radium-228.
Fluoride
Detected
Detected below the federal limit. 37 EPA records on file (most recent 2021).
Arsenic
Detected
Detected below the federal limit. 36 EPA records on file (most recent 2021).
Water hardness
very hard
Stanfield's water is very hard. Hardness isn't a health risk, but it drives scale on fixtures and water heaters, shortens appliance life, and leaves skin and hair dry.
EPA violations may be administrative or monitoring/reporting issues rather than measured exceedances of a health limit. A utility appearing on this list does not by itself mean the water is unsafe to drink. Health-based goals (EPA MCLG / WHO) are health targets and are often stricter than the legal limit (the federal MCL). The only way to know what is in your specific home is to test your own water.
Your water provider
MARICOPA MOUNTAIN DWID 1
- Population served
- 450
- PWSID
- AZ0411087
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