Public water system · OH7843312

Active

Willow Lake Park

At a glance

Willow Lake Park (PWSID OH7843312) is an active transient non-community water system in Trumbull County, Ohio. It reports serving 110 people through 187 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, 4 are health-based, and the most recent began in September 2024.

Dataset updated October 2026 . Source: EPA SDWIS/ECHO public records.

Population served

110

Service connections

187

Primary source

Groundwater

System type

TNCWS

Transient non-community water system

System record

PWSIDOH7843312

System typeTransient non-community water system

Activity statusActive

Population served110

Service connections187

Primary water sourceGroundwater

Owner typePrivate

Primacy agencyOH state drinking water program

City served—

StateOhio

ZIP—

CountyTrumbull County

How does Willow Lake Park compare with other water systems in Trumbull County?

By EPA's size categories, Willow Lake Park is a very small system (500 people or fewer). Trumbull County has 79 active public water systems. Its population served is well below the county average of 1,977 people per system, and accounts for less than 0.1% of the 156,184 people reported by systems filed under the county. Across Ohio, the 3,854 active systems average 2,767 people each. Nationally, the average active transient non-community water system reports serving 144 people, so Willow Lake Park is about 24% below that figure.

What does “transient non-community water system” mean?

A transient non-community water system serves places where people do not stay long, such as gas stations and campgrounds, and regularly serves at least 25 people a day for at least 60 days a year. Ohio has 2,282 active transient non-community water systems, 59% of the state's 3,854 active systems. Groundwater means the system draws its water from wells or springs fed by underground aquifers. 3,446 Ohio systems (89%) list groundwater as their primary source.

Who owns and regulates Willow Lake Park?

EPA lists Willow Lake Park as privately owned. The OH state drinking water program is its primacy agency, the regulator with primary enforcement responsibility for the system under the Safe Drinking Water Act. 62 of the 79 active systems in Trumbull County (78%) are also privately owned.

Does Willow Lake Park have drinking water violations?

Of the 12 most recent violations in EPA's records, 4 are health-based, and the most recent began in September 2024. The violations listed here began between September 2012 and September 2024. By type: 4 monitoring and reporting, 3 public notice, recordkeeping or other, 3 required treatment not met, 1 reporting and 1 contaminant level above the legal limit. The contaminant or rule involved most often is Revised Total Coliform Rule (4 of them). EPA lists 7 as resolved, 3 as unaddressed 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. 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
2024-09-13	Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75	Public Noticecode 7500	No	Unaddressed
2024-05-13	Required treatment not metTreatment Technique Startup Procedures (RTCR) · code 2D	Revised Total Coliform Rulecode 8000	Yes	Resolved
2022-09-04	Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75	Public Noticecode 7500	No	Unaddressed
2022-05-13	Required treatment not metTreatment Technique Startup Procedures (RTCR) · code 2D	Revised Total Coliform Rulecode 8000	Yes	Resolved
2018-06-10	Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75	Public Noticecode 7500	No	Unaddressed
2018-05-07	ReportingReport Startup Procedures Cert Form (RTCR) · code 4C	Revised Total Coliform Rulecode 8000	No	Resolved
2016-05-01	Required treatment not metTreatment Technique Startup Procedures (RTCR) · code 2D	Revised Total Coliform Rulecode 8000	Yes	Resolved
2014-07-17	Monitoring and reportingMonitoring, Source Water (GWR) · code 34	E. colicode 3014	No	Resolved
2014-07-01	Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22	Total coliform bacteria (TCR)code 3100	Yes	Archived
2014-07-01	Monitoring and reportingMonitoring, Repeat Major (TCR) · code 25	Total coliform bacteria (TCR)code 3100	No	Resolved
2012-10-01	Monitoring and reportingMonitoring, Routine Major (TCR) · code 23	Total coliform bacteria (TCR)code 3100	No	Archived
2012-09-13	Monitoring and reportingMonitoring, Source Water (GWR) · code 34	E. colicode 3014	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.

Willow Lake Park: frequently asked questions

Who runs Willow Lake Park?

Willow Lake Park (PWSID OH7843312) is a transient non-community water system privately owned. It is regulated by the OH state drinking water program.

How many people does Willow Lake Park serve?

Willow Lake Park reports serving 110 people through 187 service connections in Trumbull County, Ohio.

Where does Willow Lake Park 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 Willow Lake Park have any drinking water violations?

Of the 12 most recent violations in EPA's records, 4 are health-based, and the most recent began in September 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 Willow Lake Park'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, 4 are health-based, and the most recent began in September 2024. For current results, consult EPA ECHO, or the OH state drinking water program.

Where can I find Willow Lake Park's water quality report?

The annual Consumer Confidence Report requirement applies to community water systems. Willow Lake Park is a 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 Trumbull County

Water system	County	Population served	Type	Source
Warren City Pws	Trumbull	49,130	Community	Surface water
Niles City Pws	Trumbull	21,961	Community	Purchased surface water
Girard City	Trumbull	14,122	Community	Purchased surface water
Trumbull Co. - Southeast Pws	Trumbull	9,931	Community	Purchased surface water
Hubbard City Pws	Trumbull	8,518	Community	Purchased surface water
Trumbull Co. - Bazetta/Champion	Trumbull	8,270	Community	Purchased surface water

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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, “Willow Lake Park, PWSID OH7843312, Ohio”, https://aquacensus.com/water-systems/ohio/willow-lake-park-oh7843312 (data as of October 1, 2026).