Public water system · WI8070310
ActiveGrantsburg Waterworks
At a glance
Grantsburg Waterworks (PWSID WI8070310) is an active community water system in Burnett County, Wisconsin. It reports serving 1,460 people through 540 service connections. Its primary water source is groundwater, and EPA lists it as owned by a local government. EPA's records list 5 violations for this system; none is health-based, and the most recent began in July 2025.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
1,460
Service connections
540
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Grantsburg Waterworks compare with other water systems in Burnett County?
By EPA's size categories, Grantsburg Waterworks is a small system (501 to 3,300 people). Burnett County has 192 active public water systems, and Grantsburg Waterworks is the largest of them by population served. Its population served is about 21 times the county average of 69 people per system, and accounts for 11% of the 13,147 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 Grantsburg Waterworks 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 Grantsburg Waterworks?
EPA lists Grantsburg Waterworks 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. 11 of the 192 active systems in Burnett County (5.7%) are also owned by a local government.
Does Grantsburg Waterworks have drinking water violations?
EPA's records list 5 violations for this system; none is health-based, and the most recent began in July 2025. The violations listed here began between January 2022 and July 2025. By type: 3 public notice, recordkeeping or other, 1 reporting and 1 monitoring and reporting. The contaminant or rule involved most often is Public Notice (3 of them). EPA lists 5 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 |
|---|---|---|---|---|
| 2025-07-02 | ReportingNotification, Known or Potential LSL · code 4H | Lead and Copper Rule Revisionscode 5200 | No | Resolved |
| 2022-08-24 | Public notice, recordkeeping or otherPublic Notification Violation without NPDWR Violation · code 76 | Public Noticecode 7500 | No | Resolved |
| 2022-08-24 | Public notice, recordkeeping or otherPublic Notification Violation without NPDWR Violation · code 76 | Public Noticecode 7500 | No | Resolved |
| 2022-08-24 | Public notice, recordkeeping or otherPublic Notification Violation without NPDWR Violation · code 76 | Public Noticecode 7500 | No | Resolved |
| 2022-01-01 | Monitoring and reportingInitial Tap Sampling for Pb and Cu · code 51 | Lead and Copper Rulecode 5000 | No | Resolved |
All 5 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.
Grantsburg Waterworks: frequently asked questions
Who runs Grantsburg Waterworks?
Grantsburg Waterworks (PWSID WI8070310) is a community water system owned by a local government. It is regulated by the WI state drinking water program.
How many people does Grantsburg Waterworks serve?
Grantsburg Waterworks reports serving 1,460 people through 540 service connections in Burnett County, Wisconsin.
Where does Grantsburg Waterworks 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 Grantsburg Waterworks have any drinking water violations?
EPA's records list 5 violations for this system; none is health-based, and the most recent began in July 2025. 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 Grantsburg Waterworks' 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 5 violations for this system; none is health-based, and the most recent began in July 2025. For current results, consult the system's annual water quality report, EPA ECHO, or the WI state drinking water program.
Where can I find Grantsburg Waterworks' water quality report?
As a community water system, Grantsburg Waterworks 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 Burnett County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Siren Waterworks | Burnett | 941 | Community | Groundwater |
| Webster Waterworks | Burnett | 652 | Community | Groundwater |
| Herzl Camp Hak 1 West Bathroom | Burnett | 322 | Transient non-community | Groundwater |
| Herzl Camp Hak 2 East Bathroom | Burnett | 322 | Transient non-community | Groundwater |
| Fourwinds Market Grocery Store | Burnett | 321 | Transient non-community | Groundwater |
| Fourwinds Market Gas Station | Burnett | 321 | Transient non-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, “Grantsburg Waterworks, PWSID WI8070310, Wisconsin”, https://aquacensus.com/water-systems/wisconsin/grantsburg-waterworks-wi8070310 (data as of October 1, 2026).