Public water system · WI6100326
ActiveDorchester Waterworks
At a glance
Dorchester Waterworks (PWSID WI6100326) is an active community water system in Clark County, Wisconsin. It reports serving 834 people through 398 service connections. Its primary water source is groundwater, and EPA lists it as owned by a local government. EPA's records list one violation for this system; it is health-based, and the most recent began in January 2018.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
834
Service connections
398
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Dorchester Waterworks compare with other water systems in Clark County?
By EPA's size categories, Dorchester Waterworks is a small system (501 to 3,300 people). Clark County has 94 active public water systems, and Dorchester Waterworks is the 6th-largest of them by population served. Its population served is about 5.6 times the county average of 149 people per system, and accounts for 6% of the 14,002 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 Dorchester 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 Dorchester Waterworks?
EPA lists Dorchester 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. 32 of the 94 active systems in Clark County (34%) are also owned by a local government.
Does Dorchester Waterworks have drinking water violations?
EPA's records list one violation for this system; it is health-based, and the most recent began in January 2018. By type: 1 required treatment not met. 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 |
|---|---|---|---|---|
| 2018-01-01 | Required treatment not metOCCT/SOWT Study/Recommendation · code 57 | Lead and Copper Rulecode 5000 | Yes | 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.
Dorchester Waterworks: frequently asked questions
Who runs Dorchester Waterworks?
Dorchester Waterworks (PWSID WI6100326) is a community water system owned by a local government. It is regulated by the WI state drinking water program.
How many people does Dorchester Waterworks serve?
Dorchester Waterworks reports serving 834 people through 398 service connections in Clark County, Wisconsin.
Where does Dorchester 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 Dorchester Waterworks have any drinking water violations?
EPA's records list one violation for this system; it is health-based, and the most recent began in January 2018. 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 Dorchester 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 one violation for this system; it is health-based, and the most recent began in January 2018. For current results, consult the system's annual water quality report, EPA ECHO, or the WI state drinking water program.
Where can I find Dorchester Waterworks' water quality report?
As a community water system, Dorchester 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 Clark County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Neillsville Waterworks | Clark | 2,384 | Community | Groundwater |
| Thorp Waterworks | Clark | 1,636 | Community | Groundwater |
| Loyal Waterworks | Clark | 1,308 | Community | Groundwater |
| Greenwood Waterworks | Clark | 1,079 | Community | Groundwater |
| Owen Waterworks | Clark | 936 | Community | Groundwater |
| Clark County Rehabilitation & Living Center | Clark | 510 | 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, “Dorchester Waterworks, PWSID WI6100326, Wisconsin”, https://aquacensus.com/water-systems/wisconsin/dorchester-waterworks-wi6100326 (data as of October 1, 2026).