Public water system · MT0000325
ActiveSand Coulee Water Users District
At a glance
Sand Coulee Water Users District (PWSID MT0000325) is an active community water system in Cascade County, Montana. It reports serving 180 people through 76 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, one is health-based, and the most recent began in December 2024.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
180
Service connections
76
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Sand Coulee Water Users District compare with other water systems in Cascade County?
By EPA's size categories, Sand Coulee Water Users District is a very small system (500 people or fewer). Cascade County has 98 active public water systems. Its population served is well below the county average of 985 people per system, and accounts for 0.2% of the 96,513 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 Sand Coulee Water Users District is well below 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. Groundwater means the system draws its water from wells or springs fed by underground aquifers. 1,994 Montana systems (84%) list groundwater as their primary source.
Who owns and regulates Sand Coulee Water Users District?
EPA lists Sand Coulee Water Users District 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. 14 of the 98 active systems in Cascade County (14%) are also owned by a local government.
Does Sand Coulee Water Users District have drinking water violations?
Of the 12 most recent violations in EPA's records, one is health-based, and the most recent began in December 2024. The violations listed here began between July 2017 and December 2024. By type: 9 monitoring and reporting, 2 public notice, recordkeeping or other and 1 required treatment not met. The contaminant or rule involved most often is Lead and Copper Rule (2 of them). EPA lists 9 as resolved and 3 as unaddressed. 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 |
|---|---|---|---|---|
| 2024-12-30 | Monitoring and reportingLead Consumer Notice · code 66 | Lead and Copper Rulecode 5000 | No | Unaddressed |
| 2024-10-01 | Public notice, recordkeeping or otherConsumer Confidence Report Inadequate Reporting · code 72 | Consumer Confidence Rulecode 7000 | No | Unaddressed |
| 2024-07-01 | Public notice, recordkeeping or otherConsumer Confidence Report Complete Failure to Report · code 71 | Consumer Confidence Rulecode 7000 | No | Unaddressed |
| 2023-07-01 | Required treatment not metFailure To Address Deficiency · code 45 | Groundwater Rulecode 0700 | Yes | Resolved |
| 2018-11-14 | Monitoring and reportingMonitoring, Source Water (GWR) · code 34 | E. colicode 3014 | No | Resolved |
| 2018-04-01 | Monitoring and reportingLead Consumer Notice · code 66 | Lead and Copper Rulecode 5000 | No | Resolved |
| 2018-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Combined Radium (-226 and -228)code 4010 | No | Resolved |
| 2018-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Gross alpha (excluding radon and uranium)code 4000 | No | Resolved |
| 2017-07-01 | Monitoring and reportingMonitoring, Regular · code 03 | Lindane (gamma-BHC)code 2010 | No | Resolved |
| 2017-07-01 | Monitoring and reportingMonitoring, Regular · code 03 | Chlordanecode 2959 | No | Resolved |
| 2017-07-01 | Monitoring and reportingMonitoring, Regular · code 03 | Oxamylcode 2036 | No | Resolved |
| 2017-07-01 | Monitoring and reportingMonitoring, Regular · code 03 | Carbofurancode 2046 | 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.
Sand Coulee Water Users District: frequently asked questions
Who runs Sand Coulee Water Users District?
Sand Coulee Water Users District (PWSID MT0000325) is a community water system owned by a local government. It is regulated by the MT state drinking water program.
How many people does Sand Coulee Water Users District serve?
Sand Coulee Water Users District reports serving 180 people through 76 service connections in Cascade County, Montana.
Where does Sand Coulee Water Users District 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 Sand Coulee Water Users District have any drinking water violations?
Of the 12 most recent violations in EPA's records, one is health-based, and the most recent began in December 2024. 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 Sand Coulee Water Users District'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, one is health-based, and the most recent began in December 2024. For current results, consult the system's annual water quality report, EPA ECHO, or the MT state drinking water program.
Where can I find Sand Coulee Water Users District's water quality report?
As a community water system, Sand Coulee Water Users District 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 Cascade County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Great Falls City of | Cascade | 60,000 | Community | Surface water |
| Malmstrom Air Force Base | Cascade | 8,850 | Community | Purchased surface water |
| Source Giant Springs Inc. | Cascade | 3,007 | Non-transient non-community | Groundwater |
| Montana Expo Park Cascade County | Cascade | 2,510 | Transient non-community | Purchased surface water |
| Sun Prairie Village County | Cascade | 1,800 | Community | Groundwater |
| University of Providence | Cascade | 1,472 | Non-transient non-community | Purchased 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, “Sand Coulee Water Users District, PWSID MT0000325, Montana”, https://aquacensus.com/water-systems/montana/sand-coulee-water-users-district-mt0000325 (data as of October 1, 2026).