Public water system · AZ0407056
ActiveEpcor - Paradise Valley/Scottsdale
At a glance
Epcor - Paradise Valley/Scottsdale (PWSID AZ0407056) is an active community water system in Maricopa County, Arizona. It reports serving 14,107 people through 5,643 service connections. Its primary water source is purchased surface water, and EPA lists it as privately owned. Of the 12 most recent violations in EPA's records, one is health-based, and the most recent began in September 2024.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
14,107
Service connections
5,643
Primary source
SWP
Purchased surface water
System type
CWS
Community water system
System record
How does Epcor - Paradise Valley/Scottsdale compare with other water systems in Maricopa County?
By EPA's size categories, Epcor - Paradise Valley/Scottsdale is a large system (10,001 to 100,000 people). Maricopa County has 217 active public water systems. Its population served is about 31% below the county average of 20,368 people per system, and accounts for 0.3% 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 Epcor - Paradise Valley/Scottsdale is about twice 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. Purchased surface water means the system buys surface water from another public water system rather than drawing its own. 22 Arizona systems (1.2%) list purchased surface water as their primary source.
Who owns and regulates Epcor - Paradise Valley/Scottsdale?
EPA lists Epcor - Paradise Valley/Scottsdale as privately owned. 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. 89 of the 217 active systems in Maricopa County (41%) are also privately owned.
Does Epcor - Paradise Valley/Scottsdale have drinking water violations?
Of the 12 most recent violations in EPA's records, one is health-based, and the most recent began in September 2024. The violations listed here began between January 2008 and September 2024. By type: 8 monitoring and reporting, 2 public notice, recordkeeping or other, 1 reporting and 1 contaminant level above the legal limit. The contaminant or rule involved most often is Arsenic (2 of them). EPA lists 12 as resolved. 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.
| Began | Violation | Contaminant or rule | Health-based | Status |
|---|---|---|---|---|
| 2024-09-01 | Monitoring and reportingMonitoring of Treatment (SWTR-Filter) · code 36 | Surface Water Treatment Rulecode 0200 | No | Resolved |
| 2024-04-01 | Monitoring and reportingMonitoring, Regular · code 03 | Arseniccode 1005 | No | Resolved |
| 2018-02-01 | ReportingReport Sample Result/Fail Monitor (RTCR) · code 4B | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2013-01-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Chlorinecode 0999 | No | Resolved |
| 2012-07-01 | Public notice, recordkeeping or otherConsumer Confidence Report Complete Failure to Report · code 71 | Consumer Confidence Rulecode 7000 | No | Resolved |
| 2012-03-01 | Monitoring and reportingMonitoring, Routine Minor (TCR) · code 24 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2011-02-01 | Monitoring and reportingMonitoring, Routine Minor (TCR) · code 24 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2011-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | 2,3,7,8-TCDD (dioxin)code 2063 | No | Resolved |
| 2009-10-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Chlorinecode 0999 | No | Resolved |
| 2009-07-01 | Public notice, recordkeeping or otherConsumer Confidence Report Complete Failure to Report · code 71 | Consumer Confidence Rulecode 7000 | No | Resolved |
| 2008-04-01 | Monitoring and reportingMonitoring, Regular · code 03 | Arseniccode 1005 | No | Resolved |
| 2008-01-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Single Sample · code 01 | Trichloroethylenecode 2984 | Yes | 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.
Epcor - Paradise Valley/Scottsdale: frequently asked questions
Who runs Epcor - Paradise Valley/Scottsdale?
Epcor - Paradise Valley/Scottsdale (PWSID AZ0407056) is a community water system privately owned. It is regulated by the AZ state drinking water program.
How many people does Epcor - Paradise Valley/Scottsdale serve?
Epcor - Paradise Valley/Scottsdale reports serving 14,107 people through 5,643 service connections in Maricopa County, Arizona.
Where does Epcor - Paradise Valley/Scottsdale get its water?
EPA SDWIS lists this system's primary water source as purchased surface water. Purchased surface water means the system buys surface water from another public water system rather than drawing its own.
Does Epcor - Paradise Valley/Scottsdale have any drinking water violations?
Of the 12 most recent violations in EPA's records, one is health-based, and the most recent began in September 2024. 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 Epcor - Paradise Valley/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, one is health-based, and the most recent began in September 2024. For current results, consult the system's annual water quality report, EPA ECHO, or the AZ state drinking water program.
Where can I find Epcor - Paradise Valley/Scottsdale's water quality report?
As a community water system, Epcor - Paradise Valley/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 |
| Scottsdale City of | Maricopa | 241,361 | Community | Surface water |
| Glendale City of | Maricopa | 234,766 | 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, “Epcor - Paradise Valley/Scottsdale, PWSID AZ0407056, Arizona”, https://aquacensus.com/water-systems/arizona/epcor-paradise-valley-scottsdale-az0407056 (data as of October 1, 2026).