Public water system record
Desert Oasis
Serves Surprise, Maricopa County, AZ · 23,963 people served
Federal records show no health-based violations and 7 monitoring/reporting issues for Desert Oasis in the last ten years.
System profile
- Health-based violations, last 10 years
- 0
- Resolved
- 0
- Unresolved
- 0
- Any acute record
- No
- Monitoring issues, last 10 years
- 7
Key facts
- Desert Oasis draws water from 3 wells.
- Record on file since 2003, with 0 health-based violations before October 19, 2016.
- Lead pipe inventory: 0 lead and 0 unknown out of 10,884 service lines.
Check whether Desert Oasis serves your address
Health-based violations
Since October 2016Violation data reflects EPA records through March 2026. For the most current status, visit the EPA ECHO database.
None since October 2016.
Monitoring and reporting issues
Since October 2016Missed tests or reports, not contaminants found above a limit.
| Issue | Start date | Status |
|---|---|---|
|
Arsenic
Monitoring and reporting
|
Jul 1, 2020 | Resolved |
|
Arsenic
Monitoring and reporting
|
Apr 1, 2020 | Resolved |
|
Arsenic
Monitoring and reporting
|
Jan 1, 2020 | Resolved |
|
Arsenic
Monitoring and reporting
|
Oct 1, 2019 | Resolved |
|
Arsenic
Monitoring and reporting
|
Oct 1, 2019 | Resolved |
|
Lead and Copper Rule
Monitoring and reporting
|
Jan 1, 2019 | Resolved |
|
Chlorine
Monitoring and reporting
|
Jul 1, 2017 | Resolved |
Full record since 2003
EPA's records for Desert Oasis go back to 2003. Before October 19, 2016 they list no health-based violations and 33 monitoring or reporting violations.
| Violations that began in | Health-based | Monitoring and reporting |
|---|---|---|
| 2000s | 0 | 25 |
| 2010 to October 18, 2016 | 0 | 8 |
| October 19, 2016 to 2019 | 0 | 4 |
| 2020s | 0 | 3 |
Where the water comes from
Desert Oasis draws water from 3 wells. It also buys water from Surprise City of - Mountain Vista. 1 other community water system buys water from Desert Oasis.
Buys water from
- Surprise City of - Mountain Vista Surprise, AZ
Community systems that buy water from it
- Surprise City of - Mountain Vista Surprise, AZ
Annual water quality report
Desert Oasis must give its customers an annual water quality report (Consumer Confidence Report) by July 1, with the levels its tests found in the previous year.
Systems serving 10,000 or more people must mail or deliver the report to every customer, and from 2027 they must send it twice a year.
Find a posted report with EPA's Consumer Confidence Report search
Testing your own water
To test the water at your tap, or a private well this record does not cover, use a laboratory certified for drinking water by Arizona.
Certified drinking water labs by state EPA guidance for private wells