Public water system · MN1550010
ActiveRochester
At a glance
Rochester (PWSID MN1550010) is an active community water system in Olmsted County, Minnesota. It reports serving 123,624 people through 42,243 service connections. Its primary water source is groundwater, and EPA lists it as owned by a local government. EPA's Safe Drinking Water Act records list no violations for this system.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
123,624
Service connections
42,243
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Rochester compare with other water systems in Olmsted County?
By EPA's size categories, Rochester is a very large system (more than 100,000 people). Olmsted County has 81 active public water systems, and Rochester is the largest of them by population served. Its population served is about 68 times the county average of 1,816 people per system, and accounts for 84% of the 147,054 people reported by systems filed under the county. Across Minnesota, the 6,465 active systems average 820 people each. Nationally, the average active community water system reports serving 6,703 people, so Rochester is about 18 times 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. Minnesota has 987 active community water systems, 15% of the state's 6,465 active systems. Groundwater means the system draws its water from wells or springs fed by underground aquifers. 6,261 Minnesota systems (97%) list groundwater as their primary source.
Who owns and regulates Rochester?
EPA lists Rochester as owned by a local government. The MN state drinking water program is its primacy agency, the regulator with primary enforcement responsibility for the system under the Safe Drinking Water Act. 9 of the 81 active systems in Olmsted County (11%) are also owned by a local government.
Does Rochester have drinking water violations?
No SDWA violations on record.
EPA's SDWA violation and enforcement data (via EPA ECHO, updated quarterly) lists no violations for Rochester. For the latest compliance status, check EPA ECHO for current compliance history.
Rochester: frequently asked questions
Who runs Rochester?
Rochester (PWSID MN1550010) is a community water system owned by a local government. It is regulated by the MN state drinking water program.
How many people does Rochester serve?
Rochester reports serving 123,624 people through 42,243 service connections in Olmsted County, Minnesota.
Where does Rochester 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 Rochester have any drinking water violations?
EPA's Safe Drinking Water Act records list no violations for this system.
Is Rochester'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 Safe Drinking Water Act records list no violations for this system. For current results, consult the system's annual water quality report, EPA ECHO, or the MN state drinking water program.
Where can I find Rochester's water quality report?
As a community water system, Rochester 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 Olmsted County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Stewartville | Olmsted | 6,850 | Community | Groundwater |
| Byron | Olmsted | 6,809 | Community | Groundwater |
| Eyota | Olmsted | 2,043 | Community | Groundwater |
| Oronoco | Olmsted | 2,040 | Community | Groundwater |
| Dover | Olmsted | 792 | Community | Groundwater |
| Crosswinds Church | Olmsted | 400 | Transient non-community | Groundwater |
Related pages
Working with water-system records? Pro adds alerts, change history and CSV export ($49/mo); Enterprise adds full national files, the API and an MCP server for AI tools.
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, “Rochester, PWSID MN1550010, Minnesota”, https://aquacensus.com/water-systems/minnesota/rochester-mn1550010 (data as of October 1, 2026).