Public water system · MT0005000
ActiveMontana Expo Park Cascade County
At a glance
Montana Expo Park Cascade County (PWSID MT0005000) is an active transient non-community water system in Cascade County, Montana. It reports serving 2,510 people through 87 service connections. Its primary water source is purchased surface water, and EPA lists it as owned by a state government. EPA's records list 7 violations for this system; none is health-based, and the most recent began in July 2024.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
2,510
Service connections
87
Primary source
SWP
Purchased surface water
System type
TNCWS
Transient non-community water system
System record
How does Montana Expo Park Cascade County compare with other water systems in Cascade County?
By EPA's size categories, Montana Expo Park Cascade County is a small system (501 to 3,300 people). Cascade County has 98 active public water systems, and Montana Expo Park Cascade County is the 4th-largest of them by population served. Its population served is about 155% above the county average of 985 people per system, and accounts for 2.6% 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 transient non-community water system reports serving 144 people, so Montana Expo Park Cascade County is about 17 times that figure.
What does “transient non-community water system” mean?
A transient non-community water system serves places where people do not stay long, such as gas stations and campgrounds, and regularly serves at least 25 people a day for at least 60 days a year. Montana has 1,206 active transient non-community water systems, 51% of the state's 2,378 active systems. Purchased surface water means the system buys surface water from another public water system rather than drawing its own. 212 Montana systems (8.9%) list purchased surface water as their primary source.
Who owns and regulates Montana Expo Park Cascade County?
EPA lists Montana Expo Park Cascade County as owned by a state 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. 10 of the 98 active systems in Cascade County (10%) are also owned by a state government.
Does Montana Expo Park Cascade County have drinking water violations?
EPA's records list 7 violations for this system; none is health-based, and the most recent began in July 2024. The violations listed here began between March 2019 and July 2024. By type: 7 monitoring. The contaminant or rule involved most often is Revised Total Coliform Rule (7 of them). EPA lists 7 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 |
|---|---|---|---|---|
| 2024-07-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2022-02-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2021-10-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2021-05-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2021-04-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2020-05-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2019-03-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
All 7 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.
Montana Expo Park Cascade County: frequently asked questions
Who runs Montana Expo Park Cascade County?
Montana Expo Park Cascade County (PWSID MT0005000) is a transient non-community water system owned by a state government. It is regulated by the MT state drinking water program.
How many people does Montana Expo Park Cascade County serve?
Montana Expo Park Cascade County reports serving 2,510 people through 87 service connections in Cascade County, Montana.
Where does Montana Expo Park Cascade County get its water?
EPA SDWIS lists this system's primary water source as purchased surface water. Purchased surface water means the system buys surface water from another public water system rather than drawing its own.
Does Montana Expo Park Cascade County have any drinking water violations?
EPA's records list 7 violations for this system; none is health-based, and the most recent began in July 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 Montana Expo Park Cascade County'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. EPA's records list 7 violations for this system; none is health-based, and the most recent began in July 2024. For current results, consult EPA ECHO, or the MT state drinking water program.
Where can I find Montana Expo Park Cascade County's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Montana Expo Park Cascade County is a 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 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 |
| Sun Prairie Village County | Cascade | 1,800 | Community | Groundwater |
| University of Providence | Cascade | 1,472 | Non-transient non-community | Purchased surface water |
| Black Eagle Cascade County Water Sewer | Cascade | 1,233 | 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, “Montana Expo Park Cascade County, PWSID MT0005000, Montana”, https://aquacensus.com/water-systems/montana/montana-expo-park-cascade-county-mt0005000 (data as of October 1, 2026).