Arizona Water Company - Ajo
EPA ID: AZ0410003 · 2,100 people served · 2 ZIP codes
ZipCheckup's reading of EPA records for Arizona Water Company - Ajo (AZ0410003): 1 violation recorded with unresolved status in the SDWIS data used. Looking at the EPA enforcement file for Arizona Water Company - Ajo, 1 violation is listed as unresolved as of its reporting date; the utility's service area includes approximately 2,100 people.
Data: EPA SDWIS
Service Area Map
Coverage area for Arizona Water Company - Ajo Source: EPA SDWIS service area boundaries.
Service area boundary - average Home Safety grade of mapped ZIPs: B
Demographics of ZIP Codes Served
The ZIP codes associated with Arizona Water Company - Ajo have a median household income of $52,127 and about 4,351 residents live in those ZIP codes (Census; not the number of people this system supplies). Approximately 72% of housing stock was built before 1986, which increases the likelihood of lead service lines and older plumbing.
Environmental Justice Note: On average, 39% of census tracts in the counties mapped to this service area are designated disadvantaged by the federal Climate and Economic Justice Screening Tool (CEJST, 2022 version). 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?
Arizona Water Company - Ajo's water is classified in EPA records as a groundwater source. 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.
Infrastructure Risk
Comparable Water Systems
Similar-sized systems in Arizona
System Overview
Arizona Water Company - Ajo (EPA ID: AZ0410003) is a community water system in Arizona that serves approximately 2,100 people from groundwater sources.
This system provides water to 2 ZIP codes across 2 communities.
ZIP-Area Home Safety Context: B (74/100)
This is the average Home Safety Score for 1 of 2 service-area ZIP codes with all required score domains observed. It is not a grade for the water utility.
Model 4.0.0 uses SDWIS identity plus accepted ECHO SDWA lifecycle-based water compliance, the UCMR 5 PFAS MCL screen, EPA radon zone, and annual EPA AirData AQI across three equally weighted domains. Missing required evidence suppresses the score.
Violation History
Status breakdown for accepted records with record years 2021-2026: 0 resolved, 0 archived, 0 addressed, and 1 unaddressed. Under this source contract, current noncompliance is the sum of addressed and unaddressed records. Archived and resolved records are excluded from current noncompliance.
Recent Violations
| Date | Contaminant | Type | Status |
|---|---|---|---|
| January 1, 2026 | Lead and Copper Rule | Non-health-based | Unaddressed (current) |
Contaminants Detected
The following contaminants have been flagged in EPA records for this water system:
| Contaminant | Category | Violations | Health-Based |
|---|---|---|---|
| Lead and Copper Rule | Monitoring & Reporting | 1 | No |
Lead & Copper
EPA Lead and Copper Rule evidence attributed directly to this water system:
| Lead Level | Exceeds Action Level | Sample Date |
|---|---|---|
| Below the reporting limit | No | 2026-12-31 |
No copper action-level exceedance record appears for this PWSID in the accepted LCR snapshot. This does not establish a clean copper measurement.
Radon Risk in Service Area
2 of 2 ZIP records with known zones are in EPA Radon Zone 2.
The EPA recommends testing all homes regardless of radon zone. County radon zones cannot replace an in-home radon test.
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.
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View available EPA compliance records for Arizona Water Company - Ajo (AZ0410003) on EPA.gov.
Frequently Asked Questions
Is Arizona Water Company - Ajo water safe to drink?
The accepted 2026Q2 ECHO snapshot shows 1 current noncompliance record and zero current records classified as health-based. That classification is not a property-specific water test or safety guarantee.
How many people does Arizona Water Company - Ajo serve?
Arizona Water Company - Ajo serves approximately 2,100 people across 2 ZIP codes in Arizona.
Where does Arizona Water Company - Ajo get its water?
The primary water source is groundwater.
Frequently Asked Questions
How to cite this page
ZipCheckup. (n.d.). Arizona Water Company - Ajo (AZ): 1 EPA Violation. https://zipcheckup.com/water-system/az0410003/
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author = {{ZipCheckup}},
title = {{Arizona Water Company - Ajo (AZ): 1 EPA Violation}},
year = {n.d.},
url = {https://zipcheckup.com/water-system/az0410003/}
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What You Can Do
Test your water
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Check your specific ZIP code
Water quality can vary within a system. View nearest ZIP report →
Contact your utility
Arizona Water Company - Ajo (EPA ID: AZ0410003) - request the latest Consumer Confidence Report or ask about specific contaminants.