Water Service Outages in Arizona by City
81% of Arizona's 749 community water systems serve 3,300 people or fewer, so many outages and boil water notices affect a single small town or subdivision.
Arizona drinking water record
Busiest year: 2024 (343 violations). Counted by the year the violation period began. Source: EPA SDWIS.
- Community water systems: 749 active systems serve about 7,115,496 people. 607 of them (81%) serve 3,300 people or fewer; 698 draw mainly on groundwater and 51 on surface water.
- Health-based violations since 2015: 1,877, at 399 systems (53% of all systems). That share is 45th of 50 states (1 = lowest).
- Most common problems: contaminant averages over the limit (896); uncorrected Ground Water Rule deficiencies (226); contaminant readings over the limit (219). Source: EPA SDWIS
- Largest system: Phoenix City Of, about 1,695,000 people, with 1 health-based violation since 2015. Source: EPA SDWIS
- Housing age: the median Arizona home was built in 1992 (US 1980). Source: US Census Bureau, ACS 2020–2024 (table B25035)
- Storm damage to water service: NOAA storm narratives mention water mains, boil water notices or lost water service in 4 episodes in Arizona since 2015. Source: NOAA Storm Events Database
- October 11, 2025, Mohave (flash flood): “Flash flooding washed out multiple water lines in Meadview overnight, leaving some customers without water until the next day.” Source: NOAA Storm Events Database
- August 7, 2022, Maricopa (flash flood): “The Emergency Manager also shared there was significant mud and runoff at a water treatment plant near 29 Palms RV Park.” Source: NOAA Storm Events Database
| System | People served | Main source | Health violations since 2015 |
|---|---|---|---|
| Phoenix City Of | 1,695,000 | Surface water | 1 |
| Tucson City Of | 732,906 | Groundwater | 0 |
| Mesa City Of | 466,000 | Surface water | 0 |
| Gilbert, Town Of | 247,600 | Surface water | 3 |
| Chandler City Of | 247,328 | Surface water | 1 |
| Scottsdale City Of | 241,361 | Surface water | 0 |
Source: EPA SDWIS.
Arizona is 5th of 6 (1 = lowest share). Source: EPA SDWIS.
Checked September 2026.
Who to call in Arizona, city by city
5 Arizona cities on this site and the water utility for each. What to do while you wait is in our water service outage guide.
- Phoenix City of Phoenix Water Services Department
- Tucson Tucson Water
- Mesa City of Mesa Water Resources
- Scottsdale Scottsdale Water
- Tempe City of Tempe Water Utilities
Frequently asked questions
Is there a water service outage in Arizona right now?
Not on this site: no reports from Arizona in the last 24 hours.
How many public water systems are in Arizona?
EPA records list 749 active community water systems in Arizona, serving about 7,115,496 people. 81% serve 3,300 people or fewer.
How common are drinking water violations in Arizona?
Since 2015, 399 of 749 community water systems in Arizona (53%) have had at least one health-based violation, 1,877 in total.
What is the largest water system in Arizona?
Phoenix City Of, which EPA records list as serving about 1,695,000 people.
Report counts are user-submitted; other figures name their official source. How our data works
Cities in Arizona with Water Service Outages Information
Mesa
no reports in the last 24 hours · pop. 518,012
City of Mesa Water Resources
Phoenix
no reports in the last 24 hours · pop. 1,680,992
City of Phoenix Water Services Department
Scottsdale
no reports in the last 24 hours · pop. 255,310
Scottsdale Water
Tempe
no reports in the last 24 hours · pop. 185,950
City of Tempe Water Utilities