Public water system · ID5420057

Active

Twin Falls City County Airport

At a glance

Twin Falls City County Airport (PWSID ID5420057) is an active non-transient non-community water system in Twin Falls County, Idaho. It reports serving 410 people through 49 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, none is health-based, and the most recent began in February 2011.

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

Population served

410

Service connections

Primary source

Groundwater

System type

NTNCWS

Non-transient non-community water system

System record

PWSIDID5420057

System typeNon-transient non-community water system

Activity statusActive

Population served410

Service connections49

Primary water sourceGroundwater

Owner typeLocal government

Primacy agencyID state drinking water program

City served—

StateIdaho

ZIP—

CountyTwin Falls County

How does Twin Falls City County Airport compare with other water systems in Twin Falls County?

By EPA's size categories, Twin Falls City County Airport 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 0.5% 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 Twin Falls City County Airport is roughly in line with 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 Twin Falls City County Airport?

EPA lists Twin Falls City County Airport as owned by a local 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. 16 of the 54 active systems in Twin Falls County (30%) are also owned by a local government.

Does Twin Falls City County Airport have drinking water violations?

Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in February 2011. The violations listed here began between January 2005 and February 2011. By type: 11 monitoring and reporting and 1 public notice, recordkeeping or other. The contaminants or rules involved are Public Notice, Nitrate, Haloacetic acids (HAA5) and Simazine. 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
2011-02-02	Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75	Public Noticecode 7500	No	Resolved
2009-01-01	Monitoring and reportingMonitoring, Regular · code 03	Nitratecode 1040	No	Resolved
2005-01-01	Monitoring and reportingMonitoring and Reporting (DBP) · code 27	Haloacetic acids (HAA5)code 2456	No	Resolved
2005-01-01	Monitoring and reportingMonitoring, Regular · code 03	Simazinecode 2037	No	Resolved
2005-01-01	Monitoring and reportingMonitoring, Regular · code 03	Alachlor (Lasso)code 2051	No	Resolved
2005-01-01	Monitoring and reportingMonitoring, Regular · code 03	Chlordanecode 2959	No	Resolved
2005-01-01	Monitoring and reportingMonitoring, Regular · code 03	Heptachlor epoxidecode 2067	No	Resolved
2005-01-01	Monitoring and reportingMonitoring, Regular · code 03	Benzo(a)pyrenecode 2306	No	Resolved
2005-01-01	Monitoring and reportingMonitoring, Regular · code 03	Hexachlorocyclopentadienecode 2042	No	Resolved
2005-01-01	Monitoring and reportingMonitoring, Regular · code 03	Toxaphenecode 2020	No	Resolved
2005-01-01	Monitoring and reportingMonitoring, Regular · code 03	Oxamylcode 2036	No	Resolved
2005-01-01	Monitoring and reportingMonitoring, Regular · code 03	Diquatcode 2032	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.

Twin Falls City County Airport: frequently asked questions

Who runs Twin Falls City County Airport?

Twin Falls City County Airport (PWSID ID5420057) is a non-transient non-community water system owned by a local government. It is regulated by the ID state drinking water program.

How many people does Twin Falls City County Airport serve?

Twin Falls City County Airport reports serving 410 people through 49 service connections in Twin Falls County, Idaho.

Where does Twin Falls City County Airport 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 Twin Falls City County Airport 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 February 2011. 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 Twin Falls City County Airport'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, none is health-based, and the most recent began in February 2011. For current results, consult EPA ECHO, or the ID state drinking water program.

Where can I find Twin Falls City County Airport's water quality report?

The annual Consumer Confidence Report requirement applies to community water systems. Twin Falls City County Airport 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

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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, “Twin Falls City County Airport, PWSID ID5420057, Idaho”, https://aquacensus.com/water-systems/idaho/twin-falls-city-county-airport-id5420057 (data as of October 1, 2026).