B60/100
DESERT OASIS — Water Quality Report 2026
Serving 23,963 people · Arizona
Water Source
Groundwater
County
—
System ID
AZ0407523
Violations
40
Contaminant Test Results
EPA Violation History
No violations in the past 5 years
Full EPA compliance since 2020.
Understanding violation severity
Tier 1Urgent health risk. Utility must notify all customers within 24 hours.Tier 2Important health or treatment issue. Customers notified within 30 days.Tier 3Administrative or monitoring issue. Reported in the annual water quality report.
Source: EPA Safe Drinking Water Information System (SDWIS) · Updated quarterly
Frequently Asked Questions About DESERT OASIS
Is DESERT OASIS water safe to drink?
DESERT OASIS water receives a grade of B (60/100), which is considered good. Out of 51 contaminants tested, none exceed EPA legal limits. The water meets federal safety standards.
What contaminants has DESERT OASIS detected?
51 contaminants were tested in DESERT OASIS's water. No contaminants exceed EPA legal limits or health goals, indicating good water quality management.
Does DESERT OASIS have any EPA violations?
Yes, DESERT OASIS has 40 EPA violation(s) on record, with the most recent in 2020. Violation types include MR, Other.
How many people does DESERT OASIS serve?
DESERT OASIS serves approximately 23,963 people, Arizona. The system provides water to 1 community: Surprise.
What type of water does DESERT OASIS provide?
DESERT OASIS sources its water from groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is AZ0407523.
How does DESERT OASIS compare to other utilities in Arizona?
DESERT OASIS scores 60/100 with a grade of B (good). This is an above-average performance for utilities statewide. Visit our Arizona state page for a full comparison of water systems.