Public water system · MT0000415

Active

Glasgow City of

At a glance

City of Glasgow (PWSID MT0000415) is an active community water system in Valley County, Montana. It reports serving 3,253 people through 1,520 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, none is health-based, and the most recent began in April 2026.

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

Population served

3,253

Service connections

1,520

Primary source

Surface water

System type

CWS

Community water system

System record

PWSIDMT0000415

System typeCommunity water system

Activity statusActive

Population served3,253

Service connections1,520

Primary water sourceSurface water

Owner typeLocal government

Primacy agencyMT state drinking water program

City servedGlasgow

StateMontana

ZIP—

CountyValley County

How does City of Glasgow compare with other water systems in Valley County?

By EPA's size categories, City of Glasgow is a small system (501 to 3,300 people). Valley County has 13 active public water systems, and City of Glasgow is the largest of them by population served. Its population served is about 7 times the county average of 466 people per system, and accounts for 54% of the 6,060 people reported by systems filed under the county. Across Montana, the 2,378 active systems average 489 people each. Nationally, the average active community water system reports serving 6,703 people, so City of Glasgow 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. Montana has 853 active community water systems, 36% of the state's 2,378 active systems. Surface water means the system draws its water from rivers, lakes, streams or reservoirs. 60 Montana systems (2.5%) list surface water as their primary source.

Who owns and regulates City of Glasgow?

EPA lists City of Glasgow as owned by a local government. The MT state drinking water program is its primacy agency, the regulator with primary enforcement responsibility for the system under the Safe Drinking Water Act. 8 of the 13 active systems in Valley County (62%) are also owned by a local government.

Does City of Glasgow have drinking water violations?

Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in April 2026. The violations listed here began between May 2008 and April 2026. By type: 7 public notice, recordkeeping or other, 3 monitoring and reporting and 2 monitoring. The contaminant or rule involved most often is Consumer Confidence Rule (7 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
2026-04-01	MonitoringMonitoring, Routine (RTCR) · code 3A	Revised Total Coliform Rulecode 8000	No	Resolved
2026-03-01	MonitoringMonitoring, Routine (RTCR) · code 3A	Revised Total Coliform Rulecode 8000	No	Resolved
2020-07-01	Public notice, recordkeeping or otherConsumer Confidence Report Complete Failure to Report · code 71	Consumer Confidence Rulecode 7000	No	Resolved
2018-07-01	Public notice, recordkeeping or otherConsumer Confidence Report Complete Failure to Report · code 71	Consumer Confidence Rulecode 7000	No	Resolved
2017-10-01	Public notice, recordkeeping or otherConsumer Confidence Report Inadequate Reporting · code 72	Consumer Confidence Rulecode 7000	No	Resolved
2014-10-01	Monitoring and reportingFollow-up Or Routine LCR Tap M/R · code 52	Lead and Copper Rulecode 5000	No	Resolved
2013-07-01	Public notice, recordkeeping or otherConsumer Confidence Report Complete Failure to Report · code 71	Consumer Confidence Rulecode 7000	No	Resolved
2012-07-01	Public notice, recordkeeping or otherConsumer Confidence Report Complete Failure to Report · code 71	Consumer Confidence Rulecode 7000	No	Resolved
2011-07-01	Public notice, recordkeeping or otherConsumer Confidence Report Complete Failure to Report · code 71	Consumer Confidence Rulecode 7000	No	Resolved
2009-07-01	Public notice, recordkeeping or otherConsumer Confidence Report Complete Failure to Report · code 71	Consumer Confidence Rulecode 7000	No	Resolved
2008-06-01	Monitoring and reportingMonitoring, Turbidity (Enhanced SWTR) · code 38	Interim Enhanced Surface Water Treatment Rulecode 0300	No	Resolved
2008-05-01	Monitoring and reportingMonitoring, Turbidity (Enhanced SWTR) · code 38	Interim Enhanced Surface Water Treatment Rulecode 0300	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.

City of Glasgow: frequently asked questions

Who runs City of Glasgow?

City of Glasgow (PWSID MT0000415) is a community water system owned by a local government. It is regulated by the MT state drinking water program.

How many people does City of Glasgow serve?

City of Glasgow reports serving 3,253 people through 1,520 service connections in Valley County, Montana.

Where does City of Glasgow 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 Glasgow 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 April 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 Glasgow'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 April 2026. For current results, consult the system's annual water quality report, EPA ECHO, or the MT state drinking water program.

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

As a community water system, City of Glasgow 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 Valley County

Water system	County	Population served	Type	Source
Fort Peck Rural County Water District	Valley	663	Community	Purchased surface water
North Valley County Water and Sewer Dist	Valley	450	Community	Purchased surface water
Nashua Town of	Valley	300	Community	Purchased surface water
Hinsdale Water Department	Valley	250	Community	Groundwater
Vandalia Glasgow West Rest Area	Valley	250	Transient non-community	Groundwater
Fort Peck Town of	Valley	240	Community	Surface water

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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, “Glasgow City of, PWSID MT0000415, Montana”, https://aquacensus.com/water-systems/montana/glasgow-city-of-mt0000415 (data as of October 1, 2026).