Public water system · WI1110101
ActiveHarmony Grove San Dist
At a glance
Harmony Grove San Dist (PWSID WI1110101) is an active community water system in Columbia County, Wisconsin. It reports serving 1,950 people through 722 service connections. Its primary water source is groundwater, and EPA lists it as owned by a local government. EPA's records list 6 violations for this system; 3 are health-based, and the most recent began in June 2015.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
1,950
Service connections
722
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Harmony Grove San Dist compare with other water systems in Columbia County?
By EPA's size categories, Harmony Grove San Dist is a small system (501 to 3,300 people). Columbia County has 140 active public water systems. Its population served is about 4.2 times the county average of 463 people per system, and accounts for 3% of the 64,780 people reported by systems filed under the county. Across Wisconsin, the 11,056 active systems average 469 people each. Nationally, the average active community water system reports serving 6,703 people, so Harmony Grove San Dist 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. Wisconsin has 1,053 active community water systems, 9.5% of the state's 11,056 active systems. Groundwater means the system draws its water from wells or springs fed by underground aquifers. 10,978 Wisconsin systems (99%) list groundwater as their primary source.
Who owns and regulates Harmony Grove San Dist?
EPA lists Harmony Grove San Dist as owned by a local government. The WI state drinking water program is its primacy agency, the regulator with primary enforcement responsibility for the system under the Safe Drinking Water Act. 16 of the 140 active systems in Columbia County (11%) are also owned by a local government.
Does Harmony Grove San Dist have drinking water violations?
EPA's records list 6 violations for this system; 3 are health-based, and the most recent began in June 2015. The violations listed here began between December 1994 and June 2015. By type: 3 contaminant level above the legal limit, 2 monitoring and reporting and 1 public notice, recordkeeping or other. The contaminant or rule involved most often is Total coliform bacteria (TCR) (4 of them). EPA lists 6 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 |
|---|---|---|---|---|
| 2015-06-01 | Monitoring and reportingMonitoring, Routine Minor (TCR) · code 24 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2015-04-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Chlorinecode 0999 | No | Resolved |
| 2005-08-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 2001-07-01 | Public notice, recordkeeping or otherConsumer Confidence Report Complete Failure to Report · code 71 | Consumer Confidence Rulecode 7000 | No | Resolved |
| 1995-09-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 1994-12-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
All 6 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.
Harmony Grove San Dist: frequently asked questions
Who runs Harmony Grove San Dist?
Harmony Grove San Dist (PWSID WI1110101) is a community water system owned by a local government. It is regulated by the WI state drinking water program.
How many people does Harmony Grove San Dist serve?
Harmony Grove San Dist reports serving 1,950 people through 722 service connections in Columbia County, Wisconsin.
Where does Harmony Grove San Dist 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 Harmony Grove San Dist have any drinking water violations?
EPA's records list 6 violations for this system; 3 are health-based, and the most recent began in June 2015. 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 Harmony Grove San Dist'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 6 violations for this system; 3 are health-based, and the most recent began in June 2015. For current results, consult the system's annual water quality report, EPA ECHO, or the WI state drinking water program.
Where can I find Harmony Grove San Dist's water quality report?
As a community water system, Harmony Grove San Dist 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 Columbia County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Portage Waterworks | Columbia | 10,437 | Community | Groundwater |
| Columbus Utilities | Columbia | 5,173 | Community | Groundwater |
| Wi Dot Rest Area 12 Dekorra West Bound | Columbia | 3,255 | Transient non-community | Groundwater |
| Wisconsin Dells Waterworks | Columbia | 3,232 | Community | Groundwater |
| Lodi Waterworks | Columbia | 3,146 | Community | Groundwater |
| Poynette Waterworks | Columbia | 2,520 | 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, “Harmony Grove San Dist, PWSID WI1110101, Wisconsin”, https://aquacensus.com/water-systems/wisconsin/harmony-grove-san-dist-wi1110101 (data as of October 1, 2026).