Public water system · WI7500094
ActiveAmherst Waterworks
At a glance
Amherst Waterworks (PWSID WI7500094) is an active community water system in Portage County, Wisconsin. It reports serving 1,119 people through 536 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; 1 is health-based, and the most recent began in October 2024.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
1,119
Service connections
536
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Amherst Waterworks compare with other water systems in Portage County?
By EPA's size categories, Amherst Waterworks is a small system (501 to 3,300 people). Portage County has 148 active public water systems, and Amherst Waterworks is the 4th-largest of them by population served. Its population served is about 3.3 times the county average of 340 people per system, and accounts for 2.2% of the 50,348 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 Amherst 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 Amherst Waterworks?
EPA lists Amherst 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 148 active systems in Portage County (22%) are also owned by a local government.
Does Amherst Waterworks have drinking water violations?
EPA's records list 5 violations for this system; 1 is health-based, and the most recent began in October 2024. The violations listed here began between July 1993 and October 2024. By type: 2 public notice, recordkeeping or other, 1 reporting, 1 required treatment not met and 1 monitoring and reporting. The contaminant or rule involved most often is Lead and Copper Rule Revisions (2 of them). EPA lists 3 as resolved and 2 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 |
|---|---|---|---|---|
| 2024-10-17 | ReportingLSL Reporting · code 4G | Lead and Copper Rule Revisionscode 5200 | No | Resolved |
| 2024-10-17 | Required treatment not metLSL Inventory · code 2E | Lead and Copper Rule Revisionscode 5200 | Yes | Resolved |
| 2024-10-17 | Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75 | Public Noticecode 7500 | No | Unaddressed |
| 2024-10-17 | Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75 | Public Noticecode 7500 | No | Unaddressed |
| 1993-07-01 | 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.
Amherst Waterworks: frequently asked questions
Who runs Amherst Waterworks?
Amherst Waterworks (PWSID WI7500094) is a community water system owned by a local government. It is regulated by the WI state drinking water program.
How many people does Amherst Waterworks serve?
Amherst Waterworks reports serving 1,119 people through 536 service connections in Portage County, Wisconsin.
Where does Amherst 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 Amherst Waterworks have any drinking water violations?
EPA's records list 5 violations for this system; 1 is health-based, and the most recent began in October 2024. 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 Amherst 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; 1 is health-based, and the most recent began in October 2024. For current results, consult the system's annual water quality report, EPA ECHO, or the WI state drinking water program.
Where can I find Amherst Waterworks' water quality report?
As a community water system, Amherst 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 Portage County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Stevens Point Waterworks | Portage | 26,717 | Community | Groundwater |
| Plover Waterworks | Portage | 13,486 | Community | Groundwater |
| Whiting Waterworks | Portage | 1,743 | Community | Groundwater |
| Mccain Foods USA | Portage | 450 | Non-transient non-community | Groundwater |
| Almond-Bancroft Public Schools | Portage | 420 | Non-transient non-community | Groundwater |
| Junction City Waterworks | Portage | 416 | Community | Groundwater |
Related pages
Working with water-system records? Pro adds alerts, change history and CSV export ($49/mo); Enterprise adds full national files, the API and an MCP server for AI tools.
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, “Amherst Waterworks, PWSID WI7500094, Wisconsin”, https://aquacensus.com/water-systems/wisconsin/amherst-waterworks-wi7500094 (data as of October 1, 2026).