Maricopa Mountain Dwid 1
EPA ID: AZ0411087 · 450 people served · 3 ZIP codes
Based on the latest federal compliance data, Maricopa Mountain Dwid 1 ha 22 violations that the EPA has not yet closed — those outstanding findings are part of the enforcement record for a utility that delivers water to approximately 450 people throughout its service territory.
Data: EPA SDWIS Last verified: 2026-04-02
Compliance Trajectory
Worsening · Risk tier: High · 95% chance of violation in next 12 months
Violations went from 4 (2022) to 13 (2025). The pattern suggests growing compliance challenges.
Service Area Map
Coverage area for Maricopa Mountain Dwid 1 Source: EPA SDWIS service area boundaries.
Service area boundary — Grade D
Service Area Demographics
The Maricopa Mountain Dwid 1 serves a community with a median household income of $80,465 and an estimated 20,864 residents across its service area.
Environmental Justice Note: 43% of the population in this service area is classified as disadvantaged under EPA's EJScreen criteria. Communities with higher disadvantaged populations often face disproportionate environmental and health burdens, including aging water infrastructure and limited resources for remediation.
💧 Where Does Your Water Come From?
Maricopa Mountain Dwid 1's water is pumped from underground aquifers. Groundwater is naturally filtered through rock and soil, but it can be vulnerable to PFAS contamination, nitrates from agriculture, and industrial chemicals that seep into the water table.
About 1% of homes in Pinal County, Arizona rely on private wells rather than public water systems. Private well owners are responsible for their own water testing and treatment.
Infrastructure Risk
Detected Contaminants
How Maricopa Mountain Dwid 1 compares to EPA limits
What This Means For You
Lead at 22 mg/L (action level) exceeds the EPA maximum of 0.015 mg/L (action level). Brain damage in children, kidney & blood pressure in adults. Consider reverse osmosis filtration.
Consumer Confidence Report Rule at 9 mg/L exceeds the EPA maximum of mg/L.
Lead and Copper Rule at 7 mg/L exceeds the EPA maximum of mg/L.
Surface Water Treatment Rule at 4 mg/L exceeds the EPA maximum of mg/L.
Revised Total Coliform Rule at 3 presence exceeds the EPA maximum of presence.
PFAS Detected in Service Area
PFAS ("forever chemicals") have been detected in water serving this system's area. 1 detection recorded.
Lead was detected in this water system. reverse osmosis filtration can reduce exposure.
Find a certified water filter →Comparable Water Systems
Similar-sized systems in Arizona
Estimated Remediation Costs
Average estimated costs across ZIP codes served by this system
Based on national averages for common remediation projects. Actual costs vary by property. Only issues flagged by EPA, FEMA, or state data for each ZIP code are included.
System Overview
Maricopa Mountain Dwid 1 (EPA ID: AZ0411087) is a community water system in Arizona that serves approximately 450 people from groundwater sources.
This system provides water to 3 ZIP codes across 2 communities.
Average Home Safety Score: D (50/100)
Based on water quality violations, lead levels, and radon risk across all ZIP codes served by this system.
Violation History
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 |
| 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 |
| April 1, 2024 | Lead | Health-based | Unresolved |
| January 1, 2024 | Lead | Health-based | Unresolved |
| January 1, 2024 | Combined Radium | Monitoring | Resolved |
| October 1, 2023 | Lead | Health-based | Unresolved |
| July 1, 2023 | Lead | Health-based | Unresolved |
| July 1, 2023 | Consumer Confidence Report Rule | Monitoring | Resolved |
| July 1, 2023 | Combined Radium | Monitoring | Resolved |
| April 27, 2023 | Lead and Copper Rule | Monitoring | Resolved |
| April 1, 2023 | Lead | Health-based | Unresolved |
Contaminants Detected
The following contaminants have been flagged in EPA records for this water system:
| Contaminant | Category | Violations | Health-Based |
|---|---|---|---|
| Lead | Inorganic | 22 | Yes |
| Consumer Confidence Report Rule | Reporting Failure | 9 | No |
| Lead and Copper Rule | Treatment Failure | 7 | No |
| Combined Radium | Radionuclides | 4 | Yes |
| Surface Water Treatment Rule | Treatment Failure | 4 | No |
| Barium | Inorganic | 3 | Yes |
| Revised Total Coliform Rule | Microbiological | 3 | No |
| Stage 2 DBP Rule | Treatment Failure | 2 | Yes |
| Stage 1 DBP Rule | Treatment Failure | 1 | No |
Health Risk Details
Lead (EPA limit: 0.015 mg/L (action level))
Brain damage in children, kidney & blood pressure in adults At-risk groups: infants, children under 6, pregnant women.
Removal methods: reverse osmosis, distillation, certified carbon block filter (NSF/ANSI 53). Find the right filter →
Lead & Copper
EPA Lead and Copper Rule sampling data for ZIP codes served by this system:
| ZIP Code | Lead Level | Exceeds Limit | Sample Date |
|---|---|---|---|
| 85272 | 0.00044 mg/L | No | N/A |
Radon Risk in Service Area
Dominant radon zone for ZIP codes served by this system: Zone 2 (Moderate Risk)
The EPA recommends testing homes in Zone 1 and Zone 2 areas for radon.
Need help with your water quality?
Typical cost: Water test: typically $20–$50 (DIY kit) · Professional inspection: $150–$400
Find the Right Water FilterFree tip: Let cold water run for 2 minutes before drinking — this helps flush lead from your pipes.
ZIP Codes Served
Coverage: 1 ZIP code confirmed via EPA Community Water System Service Area Boundaries v3 plus 2 additional ZIPs inferred from SDWIS registry data. The EPA-confirmed set is the most reliable; SDWIS-inferred entries may be narrower than the real deployment area.
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 Maricopa Mountain Dwid 1 water safe to drink?
Maricopa Mountain Dwid 1 has recorded 26 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.
How many people does Maricopa Mountain Dwid 1 serve?
Maricopa Mountain Dwid 1 serves approximately 450 people across 3 ZIP codes in Arizona.
Where does Maricopa Mountain Dwid 1 get its water?
The primary water source is groundwater.
Lead Service Line Inventory
Service line breakdown reported under the federal Lead and Copper Rule Improvements (LCRI) inventory requirement:
This system reports zero confirmed lead service lines in its inventory. Unknown-material counts may still warrant verification.
Federal LCRI rule (effective October 2024) requires every public water system to inventory its service lines and complete lead-line replacement within 10 years.
Source: EPA SDWIS Federal Service Line Inventory (Phase 2) · Submitted 2026
ZipCheckup is not affiliated with the utility or state agency. Inventory figures render verbatim from the public LCRI submission cited above; ZipCheckup does not perform inspections or replacements.
Frequently Asked Questions
What You Can Do
Test your water
Home test kits can detect lead, bacteria, and other contaminants at your tap. Find the right filter →
Check your specific ZIP code
Water quality can vary within a system. View nearest ZIP report →
Contact your utility
Maricopa Mountain Dwid 1 (EPA ID: AZ0411087) — request the latest Consumer Confidence Report or ask about specific contaminants.