Public water system · AZ0412035

Active

Elgin School

At a glance

Elgin School (PWSID AZ0412035) is an active non-transient non-community water system in Santa Cruz County, Arizona. It reports serving 150 people through 4 service connections. Its primary water source is groundwater, and EPA lists it as owned by a local government. Of the 12 most recent violations in EPA's records, 2 are health-based, and the most recent began in October 2025.

Dataset updated October 2026 . Source: EPA SDWIS/ECHO public records.

Population served

150

Service connections

Primary source

Groundwater

System type

NTNCWS

Non-transient non-community water system

System record

PWSIDAZ0412035

System typeNon-transient non-community water system

Activity statusActive

Population served150

Service connections4

Primary water sourceGroundwater

Owner typeLocal government

Primacy agencyAZ state drinking water program

City servedElgin

StateArizona

ZIP—

CountySanta Cruz County

How does Elgin School compare with other water systems in Santa Cruz County?

By EPA's size categories, Elgin School is a very small system (500 people or fewer). Santa Cruz County has 37 active public water systems. Its population served is well below the county average of 1,350 people per system, and accounts for 0.3% 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 non-transient non-community water system reports serving 430 people, so Elgin School is about 65% below that figure.

What does “non-transient non-community water system” mean?

A non-transient non-community water system regularly serves at least 25 of the same people for more than six months a year, but not where they live. Schools, factories, office buildings and hospitals with their own supply are typical examples. Arizona has 232 active non-transient non-community water systems, 13% 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 Elgin School?

EPA lists Elgin School 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. 6 of the 37 active systems in Santa Cruz County (16%) are also owned by a local government.

Does Elgin School have drinking water violations?

Of the 12 most recent violations in EPA's records, 2 are health-based, and the most recent began in October 2025. The violations listed here began between October 2015 and October 2025. By type: 5 reporting, 3 public notice, recordkeeping or other, 2 required treatment not met and 2 monitoring and reporting. The contaminant or rule involved most often is Revised Total Coliform Rule (6 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
2025-10-17	Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75	Public Noticecode 7500	No	Resolved
2024-12-20	Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75	Public Noticecode 7500	No	Resolved
2024-10-17	ReportingLSL Reporting · code 4G	Lead and Copper Rule Revisionscode 5200	No	Resolved
2024-10-17	Required treatment not metLSL Inventory · code 2E	Lead and Copper Rule Revisionscode 5200	Yes	Resolved
2024-08-01	ReportingReport Sample Result/Fail Monitor (RTCR) · code 4B	Revised Total Coliform Rulecode 8000	No	Resolved
2023-11-01	ReportingReport Sample Result/Fail Monitor (RTCR) · code 4B	Revised Total Coliform Rulecode 8000	No	Resolved
2023-10-01	Monitoring and reportingFollow-up Or Routine LCR Tap M/R · code 52	Lead and Copper Rulecode 5000	No	Resolved
2023-08-01	ReportingReport Sample Result/Fail Monitor (RTCR) · code 4B	Revised Total Coliform Rulecode 8000	No	Resolved
2023-07-01	ReportingReport Sample Result/Fail Monitor (RTCR) · code 4B	Revised Total Coliform Rulecode 8000	No	Resolved
2020-09-05	Required treatment not metTreatment Technique, Level 2 Assessment (RTCR) · code 2B	Revised Total Coliform Rulecode 8000	Yes	Resolved
2020-08-01	Public notice, recordkeeping or otherSample Siting Plan Errors (RTCR) · code 5A	Revised Total Coliform Rulecode 8000	No	Resolved
2015-10-01	Monitoring and reportingMonitoring, Routine Major (TCR) · code 23	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.

Elgin School: frequently asked questions

Who runs Elgin School?

Elgin School (PWSID AZ0412035) is a non-transient non-community water system owned by a local government. It is regulated by the AZ state drinking water program.

How many people does Elgin School serve?

Elgin School reports serving 150 people through 4 service connections in Santa Cruz County, Arizona.

Where does Elgin School 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 Elgin School have any drinking water violations?

Of the 12 most recent violations in EPA's records, 2 are health-based, and the most recent began in October 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 Elgin School'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, 2 are health-based, and the most recent began in October 2025. For current results, consult EPA ECHO, or the AZ state drinking water program.

Where can I find Elgin School's water quality report?

The annual Consumer Confidence Report requirement applies to community water systems. Elgin School is a non-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, “Elgin School, PWSID AZ0412035, Arizona”, https://aquacensus.com/water-systems/arizona/elgin-school-az0412035 (data as of October 1, 2026).