Public water system · WI1250081
ActiveHollandale Waterworks
At a glance
Hollandale Waterworks (PWSID WI1250081) is an active community water system in Iowa County, Wisconsin. It reports serving 283 people through 104 service connections. Its primary water source is groundwater, and EPA lists it as owned by a local government. EPA's records list 9 violations for this system; 1 is health-based, and the most recent began in September 2022.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
283
Service connections
104
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Hollandale Waterworks compare with other water systems in Iowa County?
By EPA's size categories, Hollandale Waterworks is a very small system (500 people or fewer). Iowa County has 78 active public water systems. Its population served is about 15% below the county average of 333 people per system, and accounts for 1.1% of the 25,964 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 Hollandale 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 Hollandale Waterworks?
EPA lists Hollandale 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. 19 of the 78 active systems in Iowa County (24%) are also owned by a local government.
Does Hollandale Waterworks have drinking water violations?
EPA's records list 9 violations for this system; 1 is health-based, and the most recent began in September 2022. The violations listed here began between May 1991 and September 2022. By type: 4 public notice, recordkeeping or other, 4 monitoring and reporting and 1 required treatment not met. The contaminant or rule involved most often is Consumer Confidence Rule (3 of them). EPA lists 7 as resolved, 1 as unaddressed and 1 as archived. 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. Archived means the violation was not marked resolved but is more than five years past the end of the noncompliance period, so it no longer counts toward current compliance status.
| Began | Violation | Contaminant or rule | Health-based | Status |
|---|---|---|---|---|
| 2022-09-17 | Required treatment not metTreatment Technique, Corrective/Expedited Actions (RTCR) · code 2C | Revised Total Coliform Rulecode 8000 | Yes | Resolved |
| 2022-07-01 | Public notice, recordkeeping or otherConsumer Confidence Report Complete Failure to Report · code 71 | Consumer Confidence Rulecode 7000 | No | Resolved |
| 2022-07-01 | Public notice, recordkeeping or otherConsumer Confidence Report Inadequate Reporting · code 72 | Consumer Confidence Rulecode 7000 | No | Resolved |
| 2020-08-14 | Public notice, recordkeeping or otherNotification, State · code 05 | Groundwater Rulecode 0700 | No | Resolved |
| 2012-01-01 | Monitoring and reportingLead Consumer Notice · code 66 | Lead and Copper Rulecode 5000 | No | Unaddressed |
| 2002-07-01 | Public notice, recordkeeping or otherConsumer Confidence Report Complete Failure to Report · code 71 | Consumer Confidence Rulecode 7000 | No | Resolved |
| 2000-02-01 | Monitoring and reportingMonitoring, Routine Minor (TCR) · code 24 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 1996-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Gross alpha (excluding radon and uranium)code 4000 | No | Resolved |
| 1991-05-01 | Monitoring and reportingMonitoring, Routine Minor (TCR) · code 24 | Total coliform bacteria (TCR)code 3100 | No | Archived |
All 9 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.
Hollandale Waterworks: frequently asked questions
Who runs Hollandale Waterworks?
Hollandale Waterworks (PWSID WI1250081) is a community water system owned by a local government. It is regulated by the WI state drinking water program.
How many people does Hollandale Waterworks serve?
Hollandale Waterworks reports serving 283 people through 104 service connections in Iowa County, Wisconsin.
Where does Hollandale 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 Hollandale Waterworks have any drinking water violations?
EPA's records list 9 violations for this system; 1 is health-based, and the most recent began in September 2022. 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 Hollandale 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 9 violations for this system; 1 is health-based, and the most recent began in September 2022. For current results, consult the system's annual water quality report, EPA ECHO, or the WI state drinking water program.
Where can I find Hollandale Waterworks' water quality report?
As a community water system, Hollandale 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 Iowa County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Dodgeville Waterworks | Iowa | 4,583 | Community | Groundwater |
| Mineral Point Waterworks | Iowa | 2,487 | Community | Groundwater |
| House on the Rock | Iowa | 2,025 | Non-transient non-community | Groundwater |
| Barneveld Waterworks | Iowa | 1,258 | Community | Groundwater |
| Arena Waterworks | Iowa | 877 | Community | Groundwater |
| Highland Waterworks | Iowa | 842 | 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, “Hollandale Waterworks, PWSID WI1250081, Wisconsin”, https://aquacensus.com/water-systems/wisconsin/hollandale-waterworks-wi1250081 (data as of October 1, 2026).