Public water system · WI4430504
ActiveOconto Falls MHP
At a glance
Oconto Falls MHP (PWSID WI4430504) is an active community water system in Oconto County, Wisconsin. It reports serving 80 people through 48 service connections. Its primary water source is groundwater, and EPA lists it as privately owned. Of the 12 most recent violations in EPA's records, 2 are health-based, and the most recent began in November 2012.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
80
Service connections
48
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Oconto Falls MHP compare with other water systems in Oconto County?
By EPA's size categories, Oconto Falls MHP is a very small system (500 people or fewer). Oconto County has 202 active public water systems. Its population served is about 20% below the county average of 101 people per system, and accounts for 0.4% of the 20,322 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 Oconto Falls MHP 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 Oconto Falls MHP?
EPA lists Oconto Falls MHP as privately owned. 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. 170 of the 202 active systems in Oconto County (84%) are also privately owned.
Does Oconto Falls MHP have drinking water violations?
Of the 12 most recent violations in EPA's records, 2 are health-based, and the most recent began in November 2012. The violations listed here began between April 2009 and November 2012. By type: 5 monitoring and reporting, 5 public notice, recordkeeping or other and 2 contaminant level above the legal limit. The contaminant or rule involved most often is Total coliform bacteria (TCR) (7 of them). EPA lists 10 as resolved and 2 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. 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 |
|---|---|---|---|---|
| 2012-11-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2012-10-01 | Public notice, recordkeeping or otherConsumer Confidence Report Inadequate Reporting · code 72 | Consumer Confidence Rulecode 7000 | No | Resolved |
| 2012-08-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 2012-04-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2011-10-01 | Public notice, recordkeeping or otherConsumer Confidence Report Inadequate Reporting · code 72 | Consumer Confidence Rulecode 7000 | No | Resolved |
| 2011-08-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 2010-08-01 | Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75 | Public Noticecode 7500 | No | Resolved |
| 2010-07-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Archived |
| 2009-12-01 | Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75 | Public Noticecode 7500 | No | Resolved |
| 2009-11-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Archived |
| 2009-05-01 | Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75 | Public Noticecode 7500 | No | Resolved |
| 2009-04-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | 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.
Oconto Falls MHP: frequently asked questions
Who runs Oconto Falls MHP?
Oconto Falls MHP (PWSID WI4430504) is a community water system privately owned. It is regulated by the WI state drinking water program.
How many people does Oconto Falls MHP serve?
Oconto Falls MHP reports serving 80 people through 48 service connections in Oconto County, Wisconsin.
Where does Oconto Falls MHP 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 Oconto Falls MHP have any drinking water violations?
Of the 12 most recent violations in EPA's records, 2 are health-based, and the most recent began in November 2012. 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 Oconto Falls MHP's 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, 2 are health-based, and the most recent began in November 2012. For current results, consult the system's annual water quality report, EPA ECHO, or the WI state drinking water program.
Where can I find Oconto Falls MHP's water quality report?
As a community water system, Oconto Falls MHP 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 Oconto County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Oconto Waterworks | Oconto | 4,583 | Community | Groundwater |
| Oconto Falls Waterworks | Oconto | 2,892 | Community | Groundwater |
| Gillett Waterworks | Oconto | 1,264 | Community | Groundwater |
| Lena Waterworks | Oconto | 585 | Community | Groundwater |
| Sunnyside Elementary Sch | Oconto | 575 | Non-transient non-community | Groundwater |
| Suring Waterworks | Oconto | 517 | 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, “Oconto Falls MHP, PWSID WI4430504, Wisconsin”, https://aquacensus.com/water-systems/wisconsin/oconto-falls-mhp-wi4430504 (data as of October 1, 2026).