Public water system · AZ0407098
ActiveScottsdale City of
At a glance
City of Scottsdale (PWSID AZ0407098) is an active community water system in Maricopa County, Arizona. It reports serving 241,361 people through 92,701 service connections. Its primary water source is surface water, and EPA lists it as owned by a local government. Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in March 2025.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
241,361
Service connections
92,701
Primary source
SW
Surface water
System type
CWS
Community water system
System record
How does City of Scottsdale compare with other water systems in Maricopa County?
By EPA's size categories, City of Scottsdale is a very large system (more than 100,000 people). Maricopa County has 217 active public water systems, and City of Scottsdale is the 5th-largest of them by population served. Its population served is about 12 times the county average of 20,368 people per system, and accounts for 5.5% of the 4,419,761 people reported by systems filed under the county. Across Arizona, the 1,769 active systems average 4,369 people each. Nationally, the average active community water system reports serving 6,703 people, so City of Scottsdale is about 36 times that figure.
What does “community water system” mean?
A community water system serves at least 15 connections used by year-round residents, or regularly serves at least 25 year-round residents. Homes, apartments and mobile-home parks are served by these. Arizona has 936 active community water systems, 53% of the state's 1,769 active systems. Surface water means the system draws its water from rivers, lakes, streams or reservoirs. 61 Arizona systems (3.4%) list surface water as their primary source.
Who owns and regulates City of Scottsdale?
EPA lists City of Scottsdale as owned by a local government. The AZ state drinking water program is its primacy agency, the regulator with primary enforcement responsibility for the system under the Safe Drinking Water Act. 40 of the 217 active systems in Maricopa County (18%) are also owned by a local government.
Does City of Scottsdale have drinking water violations?
Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in March 2025. The violations listed here began between January 2019 and March 2025. By type: 12 monitoring and reporting. The contaminant or rule involved most often is Carbon, total (3 of them). EPA lists 11 as resolved and 1 as archived. Resolved means at least one resolving action is on record: the system returned to compliance, the rule no longer applies, or no further action was needed. Archived means the violation was not marked resolved but is more than five years past the end of the noncompliance period, so it no longer counts toward current compliance status.
| Began | Violation | Contaminant or rule | Health-based | Status |
|---|---|---|---|---|
| 2025-03-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Carbon, totalcode 2920 | No | Resolved |
| 2025-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | 2,4-Dcode 2105 | No | Archived |
| 2024-07-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Carbon, totalcode 2920 | No | Resolved |
| 2023-07-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Carbon, totalcode 2920 | No | Resolved |
| 2021-05-01 | Monitoring and reportingMonitoring of Treatment (SWTR-Filter) · code 36 | Surface Water Treatment Rulecode 0200 | No | Resolved |
| 2019-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Seleniumcode 1045 | No | Resolved |
| 2019-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Cyanidecode 1024 | No | Resolved |
| 2019-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nickelcode 1036 | No | Resolved |
| 2019-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Antimonycode 1074 | No | Resolved |
| 2019-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Bariumcode 1010 | No | Resolved |
| 2019-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Berylliumcode 1075 | No | Resolved |
| 2019-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Fluoridecode 1025 | No | Resolved |
The 12 most recent violations in EPA's records, newest first.Labels and codes come from EPA's SDWIS reference tables. A monitoring or reporting violation means a required test or report was missed or late; it does not by itself mean a contaminant was found. "Health-based" marks violations of a legal limit or required treatment.
City of Scottsdale: frequently asked questions
Who runs City of Scottsdale?
City of Scottsdale (PWSID AZ0407098) is a community water system owned by a local government. It is regulated by the AZ state drinking water program.
How many people does City of Scottsdale serve?
City of Scottsdale reports serving 241,361 people through 92,701 service connections in Maricopa County, Arizona.
Where does City of Scottsdale get its water?
EPA SDWIS lists this system's primary water source as surface water. Surface water means the system draws its water from rivers, lakes, streams or reservoirs.
Does City of Scottsdale have any drinking water violations?
Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in March 2025. A monitoring or reporting violation means a required test or report was missed or late; it does not by itself mean a contaminant was found.
Is City of Scottsdale's water safe to drink?
AquaCensus shows EPA compliance records, not current water test results, so it cannot say whether the water is safe at a given moment. Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in March 2025. For current results, consult the system's annual water quality report, EPA ECHO, or the AZ state drinking water program.
Where can I find City of Scottsdale's water quality report?
As a community water system, City of Scottsdale must deliver an annual water quality report, called a Consumer Confidence Report, to its customers by July 1 each year, covering the previous calendar year. The system can provide a copy on request.
Other water systems in Maricopa County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Phoenix City of | Maricopa | 1,695,000 | Community | Surface water |
| Mesa City of | Maricopa | 466,000 | Community | Surface water |
| Gilbert, Town of | Maricopa | 247,600 | Community | Surface water |
| Chandler City of | Maricopa | 247,328 | Community | Surface water |
| Glendale City of | Maricopa | 234,766 | Community | Surface water |
| Peoria City of | Maricopa | 187,676 | Community | Surface water |
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About this data
Source: U.S. EPA Safe Drinking Water Information System (SDWIS) and SDWA violation records, via EPA ECHO, as published October 1, 2026 — AquaCensus refreshes it quarterly. See the methodology for how records are matched, cleaned and scored.
Cite as: AquaCensus, “Scottsdale City of, PWSID AZ0407098, Arizona”, https://aquacensus.com/water-systems/arizona/scottsdale-city-of-az0407098 (data as of October 1, 2026).