Public water system · MT0000330
ActiveSidney City of
At a glance
City of Sidney (PWSID MT0000330) is an active community water system in Richland County, Montana. It reports serving 5,000 people through 2,520 service connections. Its primary water source is groundwater, and EPA lists it as owned by a local government. EPA's records list one violation for this system; it is not health-based, and the most recent began in October 2004.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
5,000
Service connections
2,520
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does City of Sidney compare with other water systems in Richland County?
By EPA's size categories, City of Sidney is a medium system (3,301 to 10,000 people). Richland County has 16 active public water systems, and City of Sidney is the largest of them by population served. Its population served is about 11 times the county average of 442 people per system, and accounts for 71% of the 7,074 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 Sidney is about 25% 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 City of Sidney?
EPA lists City of Sidney 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. 6 of the 16 active systems in Richland County (38%) are also owned by a local government.
Does City of Sidney have drinking water violations?
EPA's records list one violation for this system; it is not health-based, and the most recent began in October 2004. By type: 1 monitoring and reporting. The contaminant or rule involved is Lead and Copper Rule. EPA lists 1 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 |
|---|---|---|---|---|
| 2004-10-01 | Monitoring and reportingFollow-up Or Routine LCR Tap M/R · code 52 | Lead and Copper Rulecode 5000 | No | Resolved |
The one violation in EPA's records.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 Sidney: frequently asked questions
Who runs City of Sidney?
City of Sidney (PWSID MT0000330) 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 Sidney serve?
City of Sidney reports serving 5,000 people through 2,520 service connections in Richland County, Montana.
Where does City of Sidney 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 City of Sidney have any drinking water violations?
EPA's records list one violation for this system; it is not health-based, and the most recent began in October 2004. 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 Sidney'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 one violation for this system; it is not health-based, and the most recent began in October 2004. 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 Sidney's water quality report?
As a community water system, City of Sidney 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 Richland County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Fairview Town of | Richland | 1,000 | Community | Groundwater |
| Lambert Sewer and Water Assn | Richland | 150 | Community | Groundwater |
| Redwood Park Work Camp Phase 1 | Richland | 150 | Transient non-community | Groundwater |
| Sidney Richland County Airport Unapprove | Richland | 115 | Transient non-community | Groundwater |
| Savage Public School | Richland | 114 | Non-transient non-community | Groundwater |
| Cattlemen'S Cafe | Richland | 100 | 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, “Sidney City of, PWSID MT0000330, Montana”, https://aquacensus.com/water-systems/montana/sidney-city-of-mt0000330 (data as of October 1, 2026).