Public water system · WI4430818
ActiveSunnyside Elementary Sch
At a glance
Sunnyside Elementary Sch (PWSID WI4430818) is an active non-transient non-community water system in Oconto County, Wisconsin. It reports serving 575 people through 1 service connection. Its primary water source is groundwater, and EPA lists it as owned by a local government. EPA's records list 8 violations for this system; 7 are health-based, and the most recent began in October 2025.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
575
Service connections
1
Primary source
GW
Groundwater
System type
NTNCWS
Non-transient non-community water system
System record
How does Sunnyside Elementary Sch compare with other water systems in Oconto County?
By EPA's size categories, Sunnyside Elementary Sch is a small system (501 to 3,300 people). Oconto County has 202 active public water systems, and Sunnyside Elementary Sch is the 5th-largest of them by population served. Its population served is about 5.7 times the county average of 101 people per system, and accounts for 2.8% 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 non-transient non-community water system reports serving 430 people, so Sunnyside Elementary Sch is about 34% above that figure.
What does “non-transient non-community water system” mean?
A non-transient non-community water system regularly serves at least 25 of the same people for more than six months a year, but not where they live. Schools, factories, office buildings and hospitals with their own supply are typical examples. Wisconsin has 891 active non-transient non-community water systems, 8.1% 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 Sunnyside Elementary Sch?
EPA lists Sunnyside Elementary Sch 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 202 active systems in Oconto County (9.4%) are also owned by a local government.
Does Sunnyside Elementary Sch have drinking water violations?
EPA's records list 8 violations for this system; 7 are health-based, and the most recent began in October 2025. The violations listed here began between April 1995 and October 2025. By type: 7 contaminant level above the legal limit and 1 monitoring and reporting. The contaminant or rule involved most often is Di(2-ethylhexyl) phthalate (7 of them). EPA lists 6 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 |
|---|---|---|---|---|
| 2025-10-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Di(2-ethylhexyl) phthalatecode 2039 | Yes | Archived |
| 2025-04-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Single Sample · code 01 | Di(2-ethylhexyl) phthalatecode 2039 | Yes | Archived |
| 2011-04-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Di(2-ethylhexyl) phthalatecode 2039 | Yes | Resolved |
| 2011-01-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Di(2-ethylhexyl) phthalatecode 2039 | Yes | Resolved |
| 2010-10-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Di(2-ethylhexyl) phthalatecode 2039 | Yes | Resolved |
| 2010-07-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Di(2-ethylhexyl) phthalatecode 2039 | Yes | Resolved |
| 2010-04-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Single Sample · code 01 | Di(2-ethylhexyl) phthalatecode 2039 | Yes | Resolved |
| 1995-04-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
All 8 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.
Sunnyside Elementary Sch: frequently asked questions
Who runs Sunnyside Elementary Sch?
Sunnyside Elementary Sch (PWSID WI4430818) is a non-transient non-community water system owned by a local government. It is regulated by the WI state drinking water program.
How many people does Sunnyside Elementary Sch serve?
Sunnyside Elementary Sch reports serving 575 people through 1 service connection in Oconto County, Wisconsin.
Where does Sunnyside Elementary Sch 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 Sunnyside Elementary Sch have any drinking water violations?
EPA's records list 8 violations for this system; 7 are health-based, and the most recent began in October 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 Sunnyside Elementary Sch'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. EPA's records list 8 violations for this system; 7 are health-based, and the most recent began in October 2025. For current results, consult EPA ECHO, or the WI state drinking water program.
Where can I find Sunnyside Elementary Sch's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Sunnyside Elementary Sch is a non-transient non-community water system, so it is not required to publish one; like every public water system, it must notify the people it serves about violations under EPA's public notification rules.
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 |
| Suring Waterworks | Oconto | 517 | Community | Groundwater |
| Abrams Elementary School | Oconto | 400 | Non-transient non-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, “Sunnyside Elementary Sch, PWSID WI4430818, Wisconsin”, https://aquacensus.com/water-systems/wisconsin/sunnyside-elementary-sch-wi4430818 (data as of October 1, 2026).