Desert Oasis
EPA ID: AZ0407523 · 23,963 people served · 1 ZIP code
ZipCheckup's reading of EPA SDWIS for Desert Oasis (AZ0407523): 2 EPA violations in the last five years. Records for Desert Oasis show 2 violations over the monitored period, with every finding addressed and officially closed - the provider, which serves approximately 23,963 people, carries no outstanding enforcement actions in the current EPA dataset and meets all applicable drinking water requirements.
Data: EPA SDWIS
Service Area Map
Coverage area for Desert Oasis Source: EPA SDWIS service area boundaries.
Service area boundary
Service Area Demographics
The Desert Oasis serves a community with a median household income of $95,472 and an estimated 19,140 residents across its service area.
💧 Where Does Your Water Come From?
Desert Oasis'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.
Infrastructure Risk
Detected Contaminants
How Desert Oasis compares to EPA limits
What This Means For You
Dichloroacetic Acid at 2 mg/L exceeds the EPA maximum of 0.06 mg/L.
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
Desert Oasis (EPA ID: AZ0407523) is a community water system in Arizona that serves approximately 23,963 people from groundwater sources.
This system serves ZIP code 85387 in Surprise.
Violation History
Status breakdown for accepted records with record years 2021-2026: 0 resolved, 2 archived, 0 addressed, and 0 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 | Dichloroacetic Acid | Non-health-based | Archived |
| January 1, 2026 | Dichloroacetic Acid | Non-health-based | Archived |
Contaminants Detected
The following contaminants have been flagged in EPA records for this water system:
| Contaminant | Category | Violations | Health-Based |
|---|---|---|---|
| Dichloroacetic Acid | Disinfection Byproducts | 2 | No |
Lead & Copper
EPA Lead and Copper Rule evidence attributed directly to this water system:
| Lead Level | Exceeds Action Level | Sample Date |
|---|---|---|
| 0 mg/L | No | N/A |
No copper action-level exceedance record appears for this PWSID in the accepted LCR snapshot. This does not establish a clean copper measurement.
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.
- 85387 - Surprise
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View the full compliance record for Desert Oasis (AZ0407523) on EPA.gov.
Frequently Asked Questions
Is Desert Oasis water safe to drink?
The accepted 2026Q2 ECHO snapshot shows no current noncompliance for Desert Oasis; its 2 accepted 2021-2026 records are resolved or archived. Historical compliance status does not establish conditions at a specific tap.
How many people does Desert Oasis serve?
Desert Oasis serves approximately 23,963 people across 1 ZIP code in Arizona.
Where does Desert Oasis 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 →
Frequently Asked Questions
How to cite this page
ZipCheckup. (n.d.). Desert Oasis (AZ): 2 EPA Violations. https://zipcheckup.com/water-system/az0407523/
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title = {{Desert Oasis (AZ): 2 EPA Violations}},
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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
Desert Oasis (EPA ID: AZ0407523) - request the latest Consumer Confidence Report or ask about specific contaminants.