Epcor - Tierra Del Rio
EPA ID: AZ0407532 · 4,868 people served · 6 ZIP codes
Federal monitoring records confirm Epcor - Tierra Del Rio has operated without any EPA violations for the full five-year window — covering every contaminant category and reporting cycle across a service area of approximately 4,868 residents, with no gaps in the compliance record.
Data: EPA SDWIS Last verified: 2026-04-02
Service Area Map
Coverage area for Epcor - Tierra Del Rio Source: EPA SDWIS service area boundaries.
Service area boundary
Service Area Demographics
The Epcor - Tierra Del Rio serves a community with a median household income of $93,915 and an estimated 203,927 residents across its service area.
💧 Where Does Your Water Come From?
Epcor - Tierra Del Rio'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 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
PFAS Detected in Service Area
PFAS ("forever chemicals") have been detected in water serving this system's area. 12 detections recorded. 4 exceed federal EPA limits (4 ppt for PFOA/PFOS).
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 - Tierra Del Rio (EPA ID: AZ0407532) is a community water system in Arizona that serves approximately 4,868 people from groundwater sources.
This system provides water to 6 ZIP codes across 1 community.
Violation History
Lead & Copper
No Lead and Copper Rule sampling data available for this water system.
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
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View the full compliance record for Epcor - Tierra Del Rio (AZ0407532) on EPA.gov.
Frequently Asked Questions
Is Epcor - Tierra Del Rio water safe to drink?
Based on EPA records, Epcor - Tierra Del Rio has no recorded violations in the past 5 years — a positive indicator of water quality management.
How many people does Epcor - Tierra Del Rio serve?
Epcor - Tierra Del Rio serves approximately 4,868 people across 6 ZIP codes in Arizona.
Where does Epcor - Tierra Del Rio get its water?
The primary water source is groundwater.
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.