Public water system · AZ0412302
ActiveAz State Pks Patagonia Lake
At a glance
Az State Pks Patagonia Lake (PWSID AZ0412302) is an active transient non-community water system in Santa Cruz County, Arizona. It reports serving 564 people through 140 service connections. Its primary water source is groundwater, and EPA lists it as owned by a state government. Of the 12 most recent violations in EPA's records, one is health-based, and the most recent began in June 2020.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
564
Service connections
140
Primary source
GW
Groundwater
System type
TNCWS
Transient non-community water system
System record
How does Az State Pks Patagonia Lake compare with other water systems in Santa Cruz County?
By EPA's size categories, Az State Pks Patagonia Lake is a small system (501 to 3,300 people). Santa Cruz County has 37 active public water systems. Its population served is about 58% below the county average of 1,350 people per system, and accounts for 1.1% of the 49,946 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 Az State Pks Patagonia Lake is about 3.9 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 Az State Pks Patagonia Lake?
EPA lists Az State Pks Patagonia Lake as owned by a state 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. 2 of the 37 active systems in Santa Cruz County (5.4%) are also owned by a state government.
Does Az State Pks Patagonia Lake have drinking water violations?
Of the 12 most recent violations in EPA's records, one is health-based, and the most recent began in June 2020. The violations listed here began between March 2004 and June 2020. By type: 10 monitoring and reporting, 1 reporting and 1 contaminant level above the legal limit. The contaminant or rule involved most often is Total coliform bacteria (TCR) (8 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 |
|---|---|---|---|---|
| 2020-06-01 | ReportingReport Sample Result/Fail Monitor (RTCR) · code 4B | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2013-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitratecode 1040 | No | Resolved |
| 2010-10-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2009-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitratecode 1040 | No | Resolved |
| 2007-05-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2007-03-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2006-08-01 | Monitoring and reportingMonitoring, Repeat Major (TCR) · code 25 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2006-08-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 2006-03-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2006-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitratecode 1040 | No | Resolved |
| 2004-10-01 | Monitoring and reportingMonitoring, Routine Minor (TCR) · code 24 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2004-03-01 | Monitoring and reportingMonitoring, Repeat Major (TCR) · code 25 | Total coliform bacteria (TCR)code 3100 | 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.
Az State Pks Patagonia Lake: frequently asked questions
Who runs Az State Pks Patagonia Lake?
Az State Pks Patagonia Lake (PWSID AZ0412302) is a transient non-community water system owned by a state government. It is regulated by the AZ state drinking water program.
How many people does Az State Pks Patagonia Lake serve?
Az State Pks Patagonia Lake reports serving 564 people through 140 service connections in Santa Cruz County, Arizona.
Where does Az State Pks Patagonia Lake 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 Az State Pks Patagonia Lake 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 June 2020. 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 Az State Pks Patagonia Lake'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 June 2020. For current results, consult EPA ECHO, or the AZ state drinking water program.
Where can I find Az State Pks Patagonia Lake's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Az State Pks Patagonia Lake 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 Santa Cruz County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Nogales City of | Santa Cruz | 22,000 | Community | Groundwater |
| Liberty Water Rio Rico | Santa Cruz | 17,960 | Community | Groundwater |
| Valle Verde Water Company - East | Santa Cruz | 2,331 | Community | Groundwater |
| Epcor - Tubac | Santa Cruz | 2,076 | Community | Groundwater |
| Baca Float Water Company | Santa Cruz | 1,090 | Community | Groundwater |
| Patagonia Water Department | Santa Cruz | 819 | 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, “Az State Pks Patagonia Lake, PWSID AZ0412302, Arizona”, https://aquacensus.com/water-systems/arizona/az-state-pks-patagonia-lake-az0412302 (data as of October 1, 2026).