Public water system · MN5271188
ActiveOne Deephaven
At a glance
One Deephaven (PWSID MN5271188) is an active non-transient non-community water system in Hennepin County, Minnesota. It reports serving 40 people through 1 service connection. Its primary water source is groundwater, and EPA lists it as privately owned. EPA's records list one violation for this system; it is not health-based, and the most recent began in October 2011.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
40
Service connections
1
Primary source
GW
Groundwater
System type
NTNCWS
Non-transient non-community water system
System record
How does One Deephaven compare with other water systems in Hennepin County?
By EPA's size categories, One Deephaven is a very small system (500 people or fewer). Hennepin County has 198 active public water systems. Its population served is well below the county average of 6,444 people per system, and accounts for less than 0.1% of the 1,275,854 people reported by systems filed under the county. Across Minnesota, the 6,465 active systems average 820 people each. Nationally, the average active non-transient non-community water system reports serving 430 people, so One Deephaven is well below that figure.
What does “non-transient non-community water system” mean?
A non-transient non-community water system regularly serves at least 25 of the same people for more than six months a year, but not where they live. Schools, factories, office buildings and hospitals with their own supply are typical examples. Minnesota has 470 active non-transient non-community water systems, 7.3% 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 One Deephaven?
EPA lists One Deephaven as privately owned. 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. 112 of the 198 active systems in Hennepin County (57%) are also privately owned.
Does One Deephaven 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 2011. 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 |
|---|---|---|---|---|
| 2011-10-01 | 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.
One Deephaven: frequently asked questions
Who runs One Deephaven?
One Deephaven (PWSID MN5271188) is a non-transient non-community water system privately owned. It is regulated by the MN state drinking water program.
How many people does One Deephaven serve?
One Deephaven reports serving 40 people through 1 service connection in Hennepin County, Minnesota.
Where does One Deephaven 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 One Deephaven 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 2011. 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 One Deephaven'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 2011. For current results, consult EPA ECHO, or the MN state drinking water program.
Where can I find One Deephaven's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. One Deephaven is a non-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 Hennepin County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Minneapolis | Hennepin | 425,300 | Community | Surface water |
| Bloomington | Hennepin | 91,300 | Community | Purchased surface water |
| Brooklyn Park | Hennepin | 89,995 | Community | Groundwater |
| Maple Grove | Hennepin | 82,000 | Community | Groundwater |
| Plymouth | Hennepin | 76,546 | Community | Groundwater |
| Eden Prairie | Hennepin | 63,726 | 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, “One Deephaven, PWSID MN5271188, Minnesota”, https://aquacensus.com/water-systems/minnesota/one-deephaven-mn5271188 (data as of October 1, 2026).