Tap Truth EPA drinking water records, in plain English

Public water system record

City of Phoenix

Serves Phoenix and Paradise Valley, Maricopa County, AZ · 1,695,000 people served

Federal records show 1 health-based violation and 4 monitoring/reporting issues for City of Phoenix in the last ten years. The most serious issue in this window was a resolved Interim Enhanced Surface Water Treatment Rule violation.

  • AZ0407025
  • PHOENIX
  • AZ
  • 1,695,000 served

System profile

Source water Surface water
ZIP 85009
EPA system ID AZ0407025

Verify this system on EPA ECHO →

Health-based violations, last 10 years
1
Resolved
1
Unresolved
0
Any acute record
Yes
Monitoring issues, last 10 years
4

Key facts

  • City of Phoenix draws water from 16 wells and 5 surface water intakes.
  • Record on file since 1987, with 2 health-based violations before October 19, 2016.
  • Lead pipe inventory: 0 lead and 227,517 unknown out of 500,208 service lines.

Check whether City of Phoenix serves your address

Address suggestions by Mapbox

Health-based violations

Since October 2016

Violation data reflects EPA records through March 2026. For the most current status, visit the EPA ECHO database.

Contaminant Rule family Start date Status Acute
Interim Enhanced Surface Water Treatment Rule
Treatment technique failure
 120 Jan 1, 2021 Resolved Yes

Monitoring and reporting issues

Since October 2016

Missed tests or reports, not contaminants found above a limit.

Issue Start date Status
Surface Water Treatment Rule
Monitoring and reporting
 May 1, 2025 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
Revised Total Coliform Rule
Monitoring violation
 May 1, 2025 Resolved
Arsenic
Monitoring and reporting
 Oct 1, 2018 Resolved
Asbestos
Monitoring and reporting
 Jan 1, 2014 Resolved

Full record since 1987

EPA's records for City of Phoenix go back to 1987. Before October 19, 2016 they list 2 health-based violations (1 resolved, 1 archived by EPA without a recorded fix) and 69 monitoring or reporting violations.

Violations that began in Health-based Monitoring and reporting
1980s 1 8
1990s 0 60
2010 to October 18, 2016 1 1
October 19, 2016 to 2019 0 1
2020s 1 2

Most recent health-based violation before October 19, 2016: Total Coliform (acute), began August 2014, Resolved.

Show all 2 health-based violations before October 19, 2016
Contaminant Start date Status
Total Coliform (acute)
Contaminant limit exceeded
 Aug 1, 2014 Resolved
Trichloroethylene
Contaminant limit exceeded
 Jan 1, 1987 Archived

What the violations mean

Interim Enhanced Surface Water Treatment Rule

1 incident

The system did not meet a filtration or treatment requirement for surface water

Inadequate treatment of surface water can let pathogens such as Cryptosporidium and Giardia through

Where the water comes from

City of Phoenix draws water from 16 wells and 5 surface water intakes. It also has emergency connections to City of Tempe, City of Glendale and Epcor - Anthem. 5 other community water systems and 2 smaller public systems such as schools, businesses or campgrounds buy water from City of Phoenix. 3 other public water systems have emergency connections to City of Phoenix.

Emergency or part-time connections to

Community systems that buy water from it

Annual water quality report

City of Phoenix 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