Epcor - Agua Fria
EPA ID: AZ0407695 · 127,718 people served · 10 ZIP codes
Tallying the federal enforcement file for Epcor - Agua Fria yields 20 open violations that have not been formally closed — each finding sits in the EPA database while the utility continues to deliver water to approximately 127,718 residents and works through the required corrective action process.
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 10 (2022) to 4 (2025). The pattern suggests growing compliance challenges.
Service Area Map
Coverage area for Epcor - Agua Fria Source: EPA SDWIS service area boundaries.
Service area boundary — Grade C
Service Area Demographics
The Epcor - Agua Fria serves a community with a median household income of $104,977 and an estimated 319,461 residents across its service area.
🌊 Where Does Your Water Come From?
Epcor - Agua Fria's water is drawn from rivers, lakes, or reservoirs. Surface water sources are more exposed to agricultural runoff, stormwater, and upstream discharges, but they typically receive more intensive treatment before reaching your tap.
About 1% of homes in Maricopa 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 Epcor - Agua Fria compares to EPA limits
What This Means For You
Contaminant 1009 at 5 mg/L exceeds the EPA maximum of 0.004 mg/L. Intestinal damage, bone damage. Consider reverse osmosis filtration.
Lead at 3 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.
Total Trihalomethanes (TTHM) at 6 mg/L exceeds the EPA maximum of 0.08 mg/L. Bladder & rectal cancer risk; reproductive concerns. Consider granular activated carbon (GAC) filtration.
Haloacetic Acids (HAA5) at 1 mg/L exceeds the EPA maximum of 0.06 mg/L. Cancer risk; reproductive & developmental effects. Consider granular activated carbon (GAC) filtration.
Stage 1 DBP Rule at 14 mg/L exceeds the EPA maximum of mg/L.
PFAS Detected in Service Area
PFAS ("forever chemicals") have been detected in water serving this system's area. 25 detections recorded. 6 exceed federal EPA limits (4 ppt for PFOA/PFOS). 4 exceed state limits.
Contaminant 1009 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
Epcor - Agua Fria (EPA ID: AZ0407695) is a community water system in Arizona that serves approximately 127,718 people from surface water sources.
This system provides water to 10 ZIP codes across 6 communities.
Average Home Safety Score: C (55/100)
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 1, 2025 | Consumer Confidence Report Rule | Monitoring | Unresolved |
| September 1, 2025 | Revised Total Coliform Rule | Monitoring | Unresolved |
| August 1, 2025 | Revised Total Coliform Rule | Monitoring | Unresolved |
| July 30, 2025 | Lead and Copper Rule | Monitoring | Unresolved |
| July 2, 2025 | Lead and Copper Rule | Monitoring | Unresolved |
| July 1, 2025 | E. coli | Monitoring | Resolved |
| July 1, 2025 | Revised Total Coliform Rule | Monitoring | Unresolved |
| April 1, 2025 | Revised Total Coliform Rule | Monitoring | Unresolved |
| April 1, 2025 | Contaminant 1009 | Health-based | Unresolved |
| March 27, 2025 | Lead and Copper Rule | Monitoring | Unresolved |
| February 1, 2025 | Lead and Copper Rule | Monitoring | Resolved |
| January 1, 2025 | Contaminant 1925 | Monitoring | Unresolved |
| September 1, 2024 | E. coli | Monitoring | Resolved |
| August 1, 2024 | E. coli | Monitoring | Resolved |
| July 1, 2024 | Surface Water Treatment Rule | Monitoring | Resolved |
| June 1, 2024 | Consumer Confidence Report Rule | Monitoring | Resolved |
| June 1, 2024 | Revised Total Coliform Rule | Monitoring | Resolved |
| April 1, 2024 | Lead | Monitoring | Resolved |
| April 1, 2024 | Barium | Monitoring | Unresolved |
| April 1, 2024 | Total Trihalomethanes (TTHM) | Monitoring | Unresolved |
Contaminants Detected
The following contaminants have been flagged in EPA records for this water system:
| Contaminant | Category | Violations | Health-Based |
|---|---|---|---|
| Stage 1 DBP Rule | Treatment Failure | 14 | Yes |
| Barium | Inorganic | 11 | No |
| Revised Total Coliform Rule | Microbiological | 7 | No |
| Total Trihalomethanes (TTHM) | Disinfection Byproducts | 6 | No |
| Contaminant 1009 | Other Violation | 5 | Yes |
| Lead and Copper Rule | Treatment Failure | 5 | No |
| Contaminant 2105 | Other Violation | 4 | No |
| Consumer Confidence Report Rule | Reporting Failure | 4 | No |
| Lead | Inorganic | 3 | No |
| E. coli | Microbiological | 3 | No |
| Contaminant 1925 | Other Violation | 1 | No |
| Contaminant 2005 | Other Violation | 1 | No |
| Contaminant 2931 | Other Violation | 1 | No |
| Haloacetic Acids (HAA5) | Disinfection Byproducts | 1 | No |
| Surface Water Treatment Rule | Treatment Failure | 1 | No |
Health Risk Details
Beryllium (EPA limit: 0.004 mg/L)
Intestinal damage, bone damage At-risk groups: long-term residents, people with gastrointestinal conditions.
Removal methods: reverse osmosis, activated alumina, coagulation/filtration. 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 |
|---|---|---|---|
| 85335 | 0.0141 mg/L | No | N/A |
| 85374 | 0.0141 mg/L | No | N/A |
| 85378 | 0.0141 mg/L | No | N/A |
| 85379 | 0.0141 mg/L | No | N/A |
| 85387 | 0.0141 mg/L | No | N/A |
| 85388 | 0.0141 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: Service area ZIP codes sourced from EPA Community Water System Service Area Boundaries v3 (March 2026 release). These ZIPs reflect the actual deployment footprint recorded by AZ or modeled from parcel and building-footprint data.
- 85335 — El Mirage
- 85340 — Litchfield Park
- 85355 — Waddell
- 85374 — Surprise
- 85378 — Surprise
- 85379 — Surprise
- 85387 — Surprise
- 85388 — Surprise
- 85395 — Goodyear
- 85396 — Buckeye
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View the full compliance record for Epcor - Agua Fria (AZ0407695) on EPA.gov.
Frequently Asked Questions
Is Epcor - Agua Fria water safe to drink?
Epcor - Agua Fria has recorded 2 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 Epcor - Agua Fria serve?
Epcor - Agua Fria serves approximately 127,718 people across 10 ZIP codes in Arizona.
Where does Epcor - Agua Fria get its water?
The primary water source is surface water.
Federal UCMR5 PFAS Monitoring: Tested Clean
This water system was tested under the federal EPA Unregulated Contaminant Monitoring Rule (UCMR5). No PFAS compounds were detected.
Current MCL reflects the lowest state-enforceable limit (NYS 10 ppt for PFOA/PFOS, effective August 2020). The federal final MCL of 4 ppt for PFOA/PFOS (EPA April 2024 rule) is not enforceable until April 2029. Detections above 4 ppt but below 10 ppt are below current MCL but above the future federal limit.
Source: U.S. EPA UCMR5 (Unregulated Contaminant Monitoring Rule, 5th cycle) — per-system federal sampling, 2023–2025. EPA UCMR5 monitoring program →
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.
How Water Systems Appear in Rankings
Water systems are evaluated by violation history, contaminant detections, and service population. Larger systems with more service connections appear in more rankings.
- #93 / 100 Highest Exposure Burden (U.S.)
- #2 / 50 Highest Exposure Burden (Arizona)
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
Epcor - Agua Fria (EPA ID: AZ0407695) — request the latest Consumer Confidence Report or ask about specific contaminants.