Public water system · AZ0410301
ActiveEl Mesquital Guest Ranch
At a glance
El Mesquital Guest Ranch (PWSID AZ0410301) is an active transient non-community water system in Pima County, Arizona. It reports serving 25 people through 18 service connections. Its primary water source is groundwater, and EPA lists it as under public/private ownership. EPA's Safe Drinking Water Act records list no violations for this system.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
25
Service connections
18
Primary source
GW
Groundwater
System type
TNCWS
Transient non-community water system
System record
How does El Mesquital Guest Ranch compare with other water systems in Pima County?
By EPA's size categories, El Mesquital Guest Ranch is a very small system (500 people or fewer). Pima County has 193 active public water systems. Its population served is well below the county average of 5,896 people per system, and accounts for less than 0.1% of the 1,137,975 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 El Mesquital Guest Ranch is well below 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 El Mesquital Guest Ranch?
EPA lists El Mesquital Guest Ranch as under public/private ownership. 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. 70 of the 193 active systems in Pima County (36%) are also under public/private ownership.
Does El Mesquital Guest Ranch 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 El Mesquital Guest Ranch. For the latest compliance status, check EPA ECHO for current compliance history.
El Mesquital Guest Ranch: frequently asked questions
Who runs El Mesquital Guest Ranch?
El Mesquital Guest Ranch (PWSID AZ0410301) is a transient non-community water system under public/private ownership. It is regulated by the AZ state drinking water program.
How many people does El Mesquital Guest Ranch serve?
El Mesquital Guest Ranch reports serving 25 people through 18 service connections in Pima County, Arizona.
Where does El Mesquital Guest Ranch 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 El Mesquital Guest Ranch have any drinking water violations?
EPA's Safe Drinking Water Act records list no violations for this system.
Is El Mesquital Guest Ranch'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 El Mesquital Guest Ranch's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. El Mesquital Guest Ranch 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 Pima County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Tucson City of | Pima | 732,906 | Community | Groundwater |
| University of Arizona | Pima | 50,000 | Non-transient non-community | Groundwater |
| Metropolitan Dwid | Pima | 45,570 | Community | Groundwater |
| Oro Valley Water Utility | Pima | 42,316 | Community | Groundwater |
| Community Wc of Green Valley | Pima | 22,085 | Community | Groundwater |
| Usaf Davis Monthan Afb | Pima | 18,640 | Community | Groundwater |
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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, “El Mesquital Guest Ranch, PWSID AZ0410301, Arizona”, https://aquacensus.com/water-systems/arizona/el-mesquital-guest-ranch-az0410301 (data as of October 1, 2026).