Public water system · WI4080270
ActiveNew Holstein Waterworks
At a glance
New Holstein Waterworks (PWSID WI4080270) is an active community water system in Calumet County, Wisconsin. It reports serving 3,012 people through 1,371 service connections. Its primary water source is groundwater, and EPA lists it as owned by a local government. Of the 12 most recent violations in EPA's records, one is health-based, and the most recent began in July 2025.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
3,012
Service connections
1,371
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does New Holstein Waterworks compare with other water systems in Calumet County?
By EPA's size categories, New Holstein Waterworks is a small system (501 to 3,300 people). Calumet County has 50 active public water systems, and New Holstein Waterworks is the 5th-largest of them by population served. Its population served is about 6.2 times the county average of 485 people per system, and accounts for 12% of the 24,253 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 New Holstein Waterworks is about 55% 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 New Holstein Waterworks?
EPA lists New Holstein 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. 12 of the 50 active systems in Calumet County (24%) are also owned by a local government.
Does New Holstein Waterworks have drinking water violations?
Of the 12 most recent violations in EPA's records, one is health-based, and the most recent began in July 2025. The violations listed here began between June 2006 and July 2025. By type: 10 monitoring and reporting, 1 reporting and 1 required treatment not met. The contaminant or rule involved most often is Lead and Copper Rule (8 of them). EPA lists 11 as resolved and 1 as unaddressed. 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. Unaddressed means the violation is not resolved or archived and is not yet covered by formal enforcement.
| 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 | Unaddressed |
| 2018-01-01 | Required treatment not metPublic Education · code 65 | Lead and Copper Rulecode 5000 | Yes | Resolved |
| 2017-07-01 | Monitoring and reportingInitial, Follow-up, or Routine Source Water M/R · code 56 | Lead and Copper Rulecode 5000 | No | Resolved |
| 2017-07-01 | Monitoring and reportingInitial, Follow-up, or Routine Source Water M/R · code 56 | Lead and Copper Rulecode 5000 | No | Resolved |
| 2017-07-01 | Monitoring and reportingInitial, Follow-up, or Routine Source Water M/R · code 56 | Lead and Copper Rulecode 5000 | No | Resolved |
| 2017-06-01 | Monitoring and reportingWater Quality Parameter M/R · code 53 | Lead and Copper Rulecode 5000 | No | Resolved |
| 2017-06-01 | Monitoring and reportingWater Quality Parameter M/R · code 53 | Lead and Copper Rulecode 5000 | No | Resolved |
| 2017-06-01 | Monitoring and reportingWater Quality Parameter M/R · code 53 | Lead and Copper Rulecode 5000 | No | Resolved |
| 2017-06-01 | Monitoring and reportingWater Quality Parameter M/R · code 53 | Lead and Copper Rulecode 5000 | No | Resolved |
| 2014-01-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Haloacetic acids (HAA5)code 2456 | No | Resolved |
| 2014-01-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Total trihalomethanes (TTHM)code 2950 | No | Resolved |
| 2006-06-01 | Monitoring and reportingMonitoring, Routine Minor (TCR) · code 24 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
The 12 most recent 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.
New Holstein Waterworks: frequently asked questions
Who runs New Holstein Waterworks?
New Holstein Waterworks (PWSID WI4080270) is a community water system owned by a local government. It is regulated by the WI state drinking water program.
How many people does New Holstein Waterworks serve?
New Holstein Waterworks reports serving 3,012 people through 1,371 service connections in Calumet County, Wisconsin.
Where does New Holstein 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 New Holstein Waterworks have any drinking water violations?
Of the 12 most recent violations in EPA's records, one 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 New Holstein 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. Of the 12 most recent violations in EPA's records, one 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 New Holstein Waterworks' water quality report?
As a community water system, New Holstein 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 Calumet County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Harrison Utilities - Fka Waverly Sd | Calumet | 5,500 | Community | Purchased surface water |
| Chilton Waterworks | Calumet | 4,191 | Community | Groundwater |
| Brillion Waterworks | Calumet | 3,262 | Community | Groundwater |
| Sherwood Waterworks | Calumet | 3,114 | Community | Purchased surface water |
| Hilbert Waterworks | Calumet | 1,176 | Community | Groundwater |
| Stockbridge Waterworks | Calumet | 650 | 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, “New Holstein Waterworks, PWSID WI4080270, Wisconsin”, https://aquacensus.com/water-systems/wisconsin/new-holstein-waterworks-wi4080270 (data as of October 1, 2026).