Water Quality in 85172 — Stanfield, AZ
EPA data for MARICOPA MOUNTAIN DWID 1
Data source: U.S. Environmental Protection Agency (EPA) SDWIS Last verified: March 16, 2026
Your Water System
ZIP code 85172 in Stanfield, Arizona is served by MARICOPA MOUNTAIN DWID 1 (EPA ID: AZ0411087). This system provides water to approximately 450 people from groundwater sources.
There are 3 community water systems serving this area.
Lead & Copper in Your Water
No Lead & Copper Rule sampling data available for systems serving this ZIP code.
Violation Summary
Recent Violations
| Date | Contaminant | Type | Status |
|---|---|---|---|
| September 27, 2025 | Lead and Copper Rule | Monitoring | Unresolved |
| July 1, 2025 | Lead | Health-based | Unresolved |
| April 1, 2025 | Lead | Health-based | Unresolved |
| April 1, 2025 | Lead and Copper Rule | Monitoring | Resolved |
| January 1, 2025 | Lead | Health-based | Unresolved |
| January 1, 2025 | Lead | Health-based | Unresolved |
| December 20, 2024 | Lead and Copper Rule | Monitoring | Resolved |
| October 17, 2024 | Stage 2 DBP Rule | Monitoring | Resolved |
| October 17, 2024 | Stage 2 DBP Rule | Health-based | Resolved |
| October 1, 2024 | Lead | Health-based | Unresolved |
| July 1, 2024 | Lead | Health-based | Unresolved |
| July 1, 2024 | Lead | Health-based | Unresolved |
| July 1, 2024 | Lead | Health-based | Unresolved |
| April 1, 2024 | Lead | Health-based | Unresolved |
| April 1, 2024 | Lead | Health-based | Unresolved |
| January 1, 2024 | Lead | Health-based | Unresolved |
| January 1, 2024 | Lead | Health-based | Unresolved |
| January 1, 2024 | Lead | Health-based | Resolved |
| January 1, 2024 | Lead | Health-based | Unresolved |
| January 1, 2024 | Lead | Health-based | Resolved |
Contaminants Detected
The following contaminants have been flagged in EPA records for water systems serving this ZIP code:
| Contaminant | Category | Violations | Health-Based |
|---|---|---|---|
| Lead | Inorganic | 36 | Yes |
| Lead and Copper Rule | Treatment Technique | 15 | No |
| Consumer Confidence Report Rule | Reporting | 12 | No |
| Combined Radium | Radionuclides | 9 | Yes |
| Revised Total Coliform Rule | Microbiological | 6 | No |
| Surface Water Treatment Rule | Treatment Technique | 5 | No |
| Barium | Inorganic | 4 | Yes |
| Stage 1 DBP Rule | Treatment Technique | 2 | No |
| Stage 2 DBP Rule | Treatment Technique | 2 | Yes |
| Nickel | Inorganic | 1 | No |
Need help with your water quality?
Call to get connected with a local professional in your area.
Call (855) 384-4856This is a free service. You will be connected with an independent service provider.
Water Systems Serving This Area
| System Name | EPA ID | Population | Source |
|---|---|---|---|
| MARICOPA MOUNTAIN DWID 1 | AZ0411087 | 450 | Groundwater |
| ANTELOPE PEAK DWID | AZ0411712 | 150 | Groundwater |
| MARICOPA MOUNTAIN DWID 2 | AZ0411322 | 120 | Groundwater |
What You Can Do
- Request your water system’s Consumer Confidence Report (CCR) — Your utility is required to publish this annually
- Consider a home water test — Independent testing can reveal issues in your specific plumbing
- Install a certified water filter — NSF-certified filters can address specific contaminants
- Contact your water provider — Ask about current treatment and any ongoing remediation
Need help with water testing or filtration?
Call to get connected with a local professional in your area.
Call (855) 384-4856This is a free service. You will be connected with an independent service provider.
Other Water Quality Reports in Arizona
- 85001 (Phoenix) — 248 violations
- 85117 (Apache Junction) — 263 violations
- 85122 (Casa Grande) — 52 violations
- 85123 (Arizona City) — 94 violations
- 85127 (Chandler Heights) — 6 violations
- 85128 (Coolidge) — 101 violations
- 85131 (Eloy) — 139 violations
- 85132 (Florence) — 109 violations
- 85135 (Hayden) — 91 violations
- 85137 (Kearny) — 82 violations
- 85138 (Maricopa) — 428 violations
- 85140 (San Tan Valley) — 90 violations
- 85141 (Picacho) — 88 violations
- 85142 (Queen Creek) — 70 violations
- 85145 (Red Rock) — 43 violations
- 85173 (Superior) — 11 violations
- 85201 (Mesa) — 38 violations
- 85224 (Chandler) — 259 violations
- 85233 (Gilbert) — 364 violations
- 85250 (Scottsdale) — 34 violations
Nearby Water Quality Reports
- 85138 (Maricopa) — 9 mi — 428 violations
- 85122 (Casa Grande) — 12 mi — 52 violations
- 85123 (Arizona City) — 19 mi — 94 violations
- 85131 (Eloy) — 24 mi — 139 violations
- 85128 (Coolidge) — 26 mi — 101 violations
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View the full compliance record for MARICOPA MOUNTAIN DWID 1 (AZ0411087) on EPA.gov.
Frequently Asked Questions
Is the tap water in 85172 safe to drink?
Stanfield’s water system has recorded 41 health-based violations in the past 5 years. While the system is required to treat water to meet federal standards, you may want to consider additional precautions such as a certified water filter.
Where does 85172’s water come from?
The primary water source for this area is groundwater. MARICOPA MOUNTAIN DWID 1 serves approximately 450 people.
How can I get my water tested?
Contact your local water utility for a free water quality report, or hire a certified lab for independent home water testing. The EPA recommends testing annually if you use a private well.
Does 85172 have lead in the water?
No Lead and Copper Rule sampling data is currently available in EPA records for water systems serving ZIP code 85172. If you are concerned about lead, contact your water utility or have your tap water independently tested.
What is the radon risk in 85172?
Radon zone data is not available for ZIP code 85172. The EPA recommends testing all homes for radon regardless of location, as radon levels can vary significantly even within the same neighborhood.