Public water system · MN1020037
ActiveWillows of Ham Lake
At a glance
Willows of Ham Lake (PWSID MN1020037) is an active community water system in Anoka County, Minnesota. It reports serving 69 people through 49 service connections. Its primary water source is groundwater, and EPA lists it as privately owned. EPA's records list 2 violations for this system; none is health-based, and the most recent began in January 2023.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
69
Service connections
49
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Willows of Ham Lake compare with other water systems in Anoka County?
By EPA's size categories, Willows of Ham Lake is a very small system (500 people or fewer). Anoka County has 241 active public water systems. Its population served is well below the county average of 1,360 people per system, and accounts for less than 0.1% of the 327,753 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 Willows of Ham Lake is well 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. 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 Willows of Ham Lake?
EPA lists Willows of Ham Lake 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. 195 of the 241 active systems in Anoka County (81%) are also privately owned.
Does Willows of Ham Lake have drinking water violations?
EPA's records list 2 violations for this system; none is health-based, and the most recent began in January 2023. The violations listed here began between January 1999 and January 2023. By type: 1 monitoring and 1 monitoring and reporting. The contaminants or rules involved are Revised Total Coliform Rule and Lead and Copper Rule. EPA lists 2 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 |
|---|---|---|---|---|
| 2023-01-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 1999-01-01 | Monitoring and reportingInitial Tap Sampling for Pb and Cu · code 51 | Lead and Copper Rulecode 5000 | No | Resolved |
All 2 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.
Willows of Ham Lake: frequently asked questions
Who runs Willows of Ham Lake?
Willows of Ham Lake (PWSID MN1020037) is a community water system privately owned. It is regulated by the MN state drinking water program.
How many people does Willows of Ham Lake serve?
Willows of Ham Lake reports serving 69 people through 49 service connections in Anoka County, Minnesota.
Where does Willows of Ham Lake 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 Willows of Ham Lake have any drinking water violations?
EPA's records list 2 violations for this system; none is health-based, and the most recent began in January 2023. 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 Willows of Ham Lake'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 2 violations for this system; none is health-based, and the most recent began in January 2023. For current results, consult the system's annual water quality report, EPA ECHO, or the MN state drinking water program.
Where can I find Willows of Ham Lake's water quality report?
As a community water system, Willows of Ham Lake 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 Anoka County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Blaine | Anoka | 70,220 | Community | Groundwater |
| Coon Rapids | Anoka | 64,000 | Community | Groundwater |
| Fridley | Anoka | 27,476 | Community | Groundwater |
| Columbia Heights | Anoka | 22,278 | Community | Purchased surface water |
| Andover | Anoka | 21,455 | Community | Groundwater |
| Lino Lakes | Anoka | 17,859 | 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, “Willows of Ham Lake, PWSID MN1020037, Minnesota”, https://aquacensus.com/water-systems/minnesota/willows-of-ham-lake-mn1020037 (data as of October 1, 2026).