Public water system · AZ0407554
ActiveCarioca Shell #99
At a glance
Carioca Shell #99 (PWSID AZ0407554) is an active transient non-community water system in Maricopa County, Arizona. It reports serving 500 people through 1 service connection. Its primary water source is groundwater, and EPA lists it as privately owned. EPA's Safe Drinking Water Act records list no violations for this system.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
500
Service connections
1
Primary source
GW
Groundwater
System type
TNCWS
Transient non-community water system
System record
How does Carioca Shell #99 compare with other water systems in Maricopa County?
By EPA's size categories, Carioca Shell #99 is a very small system (500 people or fewer). 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 transient non-community water system reports serving 144 people, so Carioca Shell #99 is about 3.5 times that figure.
What does “transient non-community water system” mean?
A transient non-community water system serves places where people do not stay long, such as gas stations and campgrounds, and regularly serves at least 25 people a day for at least 60 days a year. Arizona has 601 active transient non-community water systems, 34% 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 Carioca Shell #99?
EPA lists Carioca Shell #99 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 Carioca Shell #99 have drinking water violations?
No SDWA violations on record.
EPA's SDWA violation and enforcement data (via EPA ECHO, updated quarterly) lists no violations for Carioca Shell #99. For the latest compliance status, check EPA ECHO for current compliance history.
Carioca Shell #99: frequently asked questions
Who runs Carioca Shell #99?
Carioca Shell #99 (PWSID AZ0407554) is a transient non-community water system privately owned. It is regulated by the AZ state drinking water program.
How many people does Carioca Shell #99 serve?
Carioca Shell #99 reports serving 500 people through 1 service connection in Maricopa County, Arizona.
Where does Carioca Shell #99 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 Carioca Shell #99 have any drinking water violations?
EPA's Safe Drinking Water Act records list no violations for this system.
Is Carioca Shell #99'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 Safe Drinking Water Act records list no violations for this system. For current results, consult EPA ECHO, or the AZ state drinking water program.
Where can I find Carioca Shell #99's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Carioca Shell #99 is a transient non-community water system, so it is not required to publish one; like every public water system, it must notify the people it serves about violations under EPA's public notification rules.
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, “Carioca Shell #99, PWSID AZ0407554, Arizona”, https://aquacensus.com/water-systems/arizona/carioca-shell-99-az0407554 (data as of October 1, 2026).