Public water system · ID7300042

Active

Salmon City of

At a glance

City of Salmon (PWSID ID7300042) is an active community water system in Lemhi County, Idaho. It reports serving 3,158 people through 1,620 service connections. Its primary water source is surface water, and EPA lists it as owned by a local government. Of the 12 most recent violations in EPA's records, 8 are health-based, and the most recent began in January 2026.

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

Population served

3,158

Service connections

1,620

Primary source

Surface water

System type

CWS

Community water system

System record

PWSIDID7300042

System typeCommunity water system

Activity statusActive

Population served3,158

Service connections1,620

Primary water sourceSurface water

Owner typeLocal government

Primacy agencyID state drinking water program

City served—

StateIdaho

ZIP—

CountyLemhi County

How does City of Salmon compare with other water systems in Lemhi County?

By EPA's size categories, City of Salmon is a small system (501 to 3,300 people). Lemhi County has 42 active public water systems, and City of Salmon is the largest of them by population served. Its population served is about 23 times the county average of 138 people per system, and accounts for 55% of the 5,780 people reported by systems filed under the county. Across Idaho, the 1,961 active systems average 899 people each. Nationally, the average active community water system reports serving 6,703 people, so City of Salmon is about half of that figure.

What does “community water system” mean?

A community water system serves at least 15 connections used by year-round residents, or regularly serves at least 25 year-round residents. Homes, apartments and mobile-home parks are served by these. Idaho has 765 active community water systems, 39% of the state's 1,961 active systems. Surface water means the system draws its water from rivers, lakes, streams or reservoirs. 66 Idaho systems (3.4%) list surface water as their primary source.

Who owns and regulates City of Salmon?

EPA lists City of Salmon 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. 4 of the 42 active systems in Lemhi County (9.5%) are also owned by a local government.

Does City of Salmon have drinking water violations?

Of the 12 most recent violations in EPA's records, 8 are health-based, and the most recent began in January 2026. The violations listed here began between September 2019 and January 2026. By type: 8 contaminant level above the legal limit and 4 monitoring and reporting. The contaminant or rule involved most often is Haloacetic acids (HAA5) (7 of them). EPA lists 7 as archived, 4 as resolved 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. 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. 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
2026-01-01	Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02	Haloacetic acids (HAA5)code 2456	Yes	Archived
2025-10-01	Monitoring and reportingFollow-up Or Routine LCR Tap M/R · code 52	Lead and Copper Rulecode 5000	No	Unaddressed
2025-10-01	Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02	Haloacetic acids (HAA5)code 2456	Yes	Archived
2025-07-01	Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02	Haloacetic acids (HAA5)code 2456	Yes	Archived
2025-04-01	Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02	Haloacetic acids (HAA5)code 2456	Yes	Archived
2025-04-01	Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02	Total trihalomethanes (TTHM)code 2950	Yes	Archived
2022-01-01	Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02	Haloacetic acids (HAA5)code 2456	Yes	Resolved
2021-10-01	Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02	Haloacetic acids (HAA5)code 2456	Yes	Archived
2021-09-01	Monitoring and reportingMonitoring of Treatment (SWTR-Filter) · code 36	Surface Water Treatment Rulecode 0200	No	Resolved
2021-09-01	Monitoring and reportingMonitoring, Turbidity (Enhanced SWTR) · code 38	Interim Enhanced Surface Water Treatment Rulecode 0300	No	Resolved
2021-01-01	Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02	Haloacetic acids (HAA5)code 2456	Yes	Resolved
2019-09-01	Monitoring and reportingMonitoring, Source Water (LT2) · code 32	E. colicode 3014	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.

City of Salmon: frequently asked questions

Who runs City of Salmon?

City of Salmon (PWSID ID7300042) is a community water system owned by a local government. It is regulated by the ID state drinking water program.

How many people does City of Salmon serve?

City of Salmon reports serving 3,158 people through 1,620 service connections in Lemhi County, Idaho.

Where does City of Salmon get its water?

EPA SDWIS lists this system's primary water source as surface water. Surface water means the system draws its water from rivers, lakes, streams or reservoirs.

Does City of Salmon have any drinking water violations?

Of the 12 most recent violations in EPA's records, 8 are health-based, and the most recent began in January 2026. 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 City of Salmon'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, 8 are health-based, and the most recent began in January 2026. For current results, consult the system's annual water quality report, EPA ECHO, or the ID state drinking water program.

Where can I find City of Salmon's water quality report?

As a community water system, City of Salmon must deliver an annual water quality report, called a Consumer Confidence Report, to its customers by July 1 each year, covering the previous calendar year. The system can provide a copy on request.

Other water systems in Lemhi County

Water system	County	Population served	Type	Source
Lemhi (Salmon) LDS Chapel	Lemhi	203	Transient non-community	Groundwater
Williams Lake Subd	Lemhi	200	Transient non-community	Groundwater
Elk Bend Unit 1	Lemhi	200	Community	Groundwater
LDS Church Leadore	Lemhi	151	Transient non-community	Groundwater
Lemhi County Fairgrounds	Lemhi	150	Transient non-community	Groundwater
Blm Morgan Bar Recreation Site	Lemhi	140	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, “Salmon City of, PWSID ID7300042, Idaho”, https://aquacensus.com/water-systems/idaho/salmon-city-of-id7300042 (data as of October 1, 2026).