Public water system · AZ0407538
ActiveSurprise, City of Buena Vista
At a glance
Surprise, City of Buena Vista (PWSID AZ0407538) is an active community water system in Maricopa County, Arizona. It reports serving 520 people through 176 service connections. Its primary water source is groundwater, and EPA lists it as owned by a local government. EPA's records list one violation for this system; it is not health-based, and the most recent began in March 2025.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
520
Service connections
176
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Surprise, City of Buena Vista compare with other water systems in Maricopa County?
By EPA's size categories, Surprise, City of Buena Vista is a small system (501 to 3,300 people). Maricopa County has 217 active public water systems. Its population served is well below the county average of 20,368 people per system, and accounts for less than 0.1% 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 Surprise, City of Buena Vista is well below 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. Groundwater means the system draws its water from wells or springs fed by underground aquifers. 1,612 Arizona systems (91%) list groundwater as their primary source.
Who owns and regulates Surprise, City of Buena Vista?
EPA lists Surprise, City of Buena Vista 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 Surprise, City of Buena Vista have drinking water violations?
EPA's records list one violation for this system; it is not health-based, and the most recent began in March 2025. By type: 1 reporting. The contaminant or rule involved is Revised Total Coliform Rule. EPA lists 1 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 |
|---|---|---|---|---|
| 2025-03-01 | ReportingReport Sample Result/Fail Monitor (RTCR) · code 4B | Revised Total Coliform Rulecode 8000 | No | Resolved |
The one violation in EPA's records.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.
Surprise, City of Buena Vista: frequently asked questions
Who runs Surprise, City of Buena Vista?
Surprise, City of Buena Vista (PWSID AZ0407538) is a community water system owned by a local government. It is regulated by the AZ state drinking water program.
How many people does Surprise, City of Buena Vista serve?
Surprise, City of Buena Vista reports serving 520 people through 176 service connections in Maricopa County, Arizona.
Where does Surprise, City of Buena Vista get its water?
EPA SDWIS lists this system's primary water source as groundwater. Groundwater means the system draws its water from wells or springs fed by underground aquifers.
Does Surprise, City of Buena Vista have any drinking water violations?
EPA's records list one violation for this system; it is not 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 Surprise, City of Buena Vista'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. EPA's records list one violation for this system; it is not 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 Surprise, City of Buena Vista's water quality report?
As a community water system, Surprise, City of Buena Vista 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, “Surprise, City of Buena Vista, PWSID AZ0407538, Arizona”, https://aquacensus.com/water-systems/arizona/surprise-city-of-buena-vista-az0407538 (data as of October 1, 2026).