Public water system · ID5420061

Active

Usda Ars

At a glance

Usda Ars (PWSID ID5420061) is an active non-transient non-community water system in Twin Falls County, Idaho. It reports serving 46 people through 1 service connection. Its primary water source is groundwater, and EPA lists it as owned by the federal government. Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in October 2025.

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

Population served

Service connections

Primary source

Groundwater

System type

NTNCWS

Non-transient non-community water system

System record

PWSIDID5420061

System typeNon-transient non-community water system

Activity statusActive

Population served46

Service connections1

Primary water sourceGroundwater

Owner typeFederal government

Primacy agencyID state drinking water program

City served—

StateIdaho

ZIP—

CountyTwin Falls County

How does Usda Ars compare with other water systems in Twin Falls County?

By EPA's size categories, Usda Ars is a very small system (500 people or fewer). Twin Falls County has 54 active public water systems. Its population served is well below the county average of 1,409 people per system, and accounts for less than 0.1% of the 76,088 people reported by systems filed under the county. Across Idaho, the 1,961 active systems average 899 people each. Nationally, the average active non-transient non-community water system reports serving 430 people, so Usda Ars is well 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. Idaho has 242 active non-transient non-community water systems, 12% of the state's 1,961 active systems. Groundwater means the system draws its water from wells or springs fed by underground aquifers. 1,861 Idaho systems (95%) list groundwater as their primary source.

Who owns and regulates Usda Ars?

EPA lists Usda Ars as owned by the federal government. The ID 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 54 active systems in Twin Falls County (3.7%) are also owned by the federal government.

Does Usda Ars have drinking water violations?

Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in October 2025. The violations listed here began between January 2011 and October 2025. By type: 10 monitoring and reporting and 2 monitoring. The contaminant or rule involved most often is Revised Total Coliform Rule (2 of them). EPA lists 11 as archived and 1 as unaddressed. Archived means the violation was not marked resolved but is more than five years past the end of the noncompliance period, so it no longer counts toward current compliance status. Unaddressed means the violation is not resolved or archived and is not yet covered by formal enforcement.

Began	Violation	Contaminant or rule	Health-based	Status
2025-10-01	MonitoringMonitoring, Routine (RTCR) · code 3A	Revised Total Coliform Rulecode 8000	No	Archived
2025-10-01	Monitoring and reportingFollow-up Or Routine LCR Tap M/R · code 52	Lead and Copper Rulecode 5000	No	Unaddressed
2022-07-01	MonitoringMonitoring, Routine (RTCR) · code 3A	Revised Total Coliform Rulecode 8000	No	Archived
2013-10-01	Monitoring and reportingMonitoring, Routine Major (TCR) · code 23	Total coliform bacteria (TCR)code 3100	No	Archived
2011-07-01	Monitoring and reportingMonitoring, Routine Major (TCR) · code 23	Total coliform bacteria (TCR)code 3100	No	Archived
2011-01-01	Monitoring and reportingMonitoring, Regular · code 03	1,2,4-Trichlorobenzenecode 2378	No	Archived
2011-01-01	Monitoring and reportingMonitoring, Regular · code 03	cis-1,2-Dichloroethylenecode 2380	No	Archived
2011-01-01	Monitoring and reportingMonitoring, Regular · code 03	Ethylbenzenecode 2992	No	Archived
2011-01-01	Monitoring and reportingMonitoring, Regular · code 03	1,1,2-Trichloroethanecode 2985	No	Archived
2011-01-01	Monitoring and reportingMonitoring, Regular · code 03	Benzenecode 2990	No	Archived
2011-01-01	Monitoring and reportingMonitoring, Regular · code 03	1,2-Dichloropropanecode 2983	No	Archived
2011-01-01	Monitoring and reportingMonitoring, Regular · code 03	Tetrachloroethylenecode 2987	No	Archived

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.

Usda Ars: frequently asked questions

Who runs Usda Ars?

Usda Ars (PWSID ID5420061) is a non-transient non-community water system owned by the federal government. It is regulated by the ID state drinking water program.

How many people does Usda Ars serve?

Usda Ars reports serving 46 people through 1 service connection in Twin Falls County, Idaho.

Where does Usda Ars 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 Usda Ars have any drinking water violations?

Of the 12 most recent violations in EPA's records, none is 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 Usda Ars' 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, none is health-based, and the most recent began in October 2025. For current results, consult EPA ECHO, or the ID state drinking water program.

Where can I find Usda Ars' water quality report?

The annual Consumer Confidence Report requirement applies to community water systems. Usda Ars 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 Twin Falls County

Water system	County	Population served	Type	Source
Twin Falls City of	Twin Falls	56,121	Community	Groundwater
Kimberly City of	Twin Falls	5,359	Community	Groundwater
Buhl City of	Twin Falls	4,518	Community	Groundwater
Filer Water Works	Twin Falls	2,858	Community	Groundwater
Hansen City of	Twin Falls	1,200	Community	Groundwater
LDS Church Kimberly Sc	Twin Falls	659	Transient non-community	Groundwater

Working with water-system records? Pro adds alerts, change history and CSV export ($49/mo); Enterprise adds full national files, the API and an MCP server for AI tools.

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, “Usda Ars, PWSID ID5420061, Idaho”, https://aquacensus.com/water-systems/idaho/usda-ars-id5420061 (data as of October 1, 2026).