Public water system · MN5250110
ActiveLock and Dam No. 3
At a glance
Lock and Dam No. 3 (PWSID MN5250110) is an active transient non-community water system in Goodhue County, Minnesota. It reports serving 25 people through 2 service connections. Its primary water source is groundwater, and EPA lists it as owned by the federal government. EPA's Safe Drinking Water Act records list no violations for this system.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
25
Service connections
2
Primary source
GW
Groundwater
System type
TNCWS
Transient non-community water system
System record
How does Lock and Dam No. 3 compare with other water systems in Goodhue County?
By EPA's size categories, Lock and Dam No. 3 is a very small system (500 people or fewer). Goodhue County has 90 active public water systems. Its population served is well below the county average of 489 people per system, and accounts for less than 0.1% of the 43,962 people reported by systems filed under the county. Across Minnesota, the 6,465 active systems average 820 people each. Nationally, the average active transient non-community water system reports serving 144 people, so Lock and Dam No. 3 is well below 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. Minnesota has 5,008 active transient non-community water systems, 77% 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 Lock and Dam No. 3?
EPA lists Lock and Dam No. 3 as owned by the federal 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. 1 of the 90 active systems in Goodhue County (1.1%) are also owned by the federal government.
Does Lock and Dam No. 3 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 Lock and Dam No. 3. For the latest compliance status, check EPA ECHO for current compliance history.
Lock and Dam No. 3: frequently asked questions
Who runs Lock and Dam No. 3?
Lock and Dam No. 3 (PWSID MN5250110) is a transient non-community water system owned by the federal government. It is regulated by the MN state drinking water program.
How many people does Lock and Dam No. 3 serve?
Lock and Dam No. 3 reports serving 25 people through 2 service connections in Goodhue County, Minnesota.
Where does Lock and Dam No. 3 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 Lock and Dam No. 3 have any drinking water violations?
EPA's Safe Drinking Water Act records list no violations for this system.
Is Lock and Dam No. 3'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 EPA ECHO, or the MN state drinking water program.
Where can I find Lock and Dam No. 3's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Lock and Dam No. 3 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 Goodhue County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Red Wing | Goodhue | 16,459 | Community | Groundwater |
| Cannon Falls | Goodhue | 4,237 | Community | Groundwater |
| Pine Island | Goodhue | 3,324 | Community | Groundwater |
| Zumbrota | Goodhue | 3,172 | Community | Groundwater |
| Kenyon | Goodhue | 1,817 | Community | Groundwater |
| Goodhue | Goodhue | 1,200 | 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, “Lock and Dam No. 3, PWSID MN5250110, Minnesota”, https://aquacensus.com/water-systems/minnesota/lock-and-dam-no-3-mn5250110 (data as of October 1, 2026).