Public water system · OH4301511
ActiveAqua Ohio - Mentor
At a glance
Aqua Ohio - Mentor (PWSID OH4301511) is an active community water system in Lake County, Ohio. It reports serving 74,500 people through 32,735 service connections. Its primary water source is surface water, and EPA lists it as privately owned. EPA's records list 3 violations for this system; 1 is health-based, and the most recent began in January 2025.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
74,500
Service connections
32,735
Primary source
SW
Surface water
System type
CWS
Community water system
System record
How does Aqua Ohio - Mentor compare with other water systems in Lake County?
By EPA's size categories, Aqua Ohio - Mentor is a large system (10,001 to 100,000 people). Lake County has 20 active public water systems, and Aqua Ohio - Mentor is the 2nd-largest of them by population served. Its population served is about 6.5 times the county average of 11,511 people per system, and accounts for 32% of the 230,218 people reported by systems filed under the county. Across Ohio, the 3,854 active systems average 2,767 people each. Nationally, the average active community water system reports serving 6,703 people, so Aqua Ohio - Mentor is about 11 times 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. Ohio has 1,028 active community water systems, 27% of the state's 3,854 active systems. Surface water means the system draws its water from rivers, lakes, streams or reservoirs. 102 Ohio systems (2.6%) list surface water as their primary source.
Who owns and regulates Aqua Ohio - Mentor?
EPA lists Aqua Ohio - Mentor 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. 13 of the 20 active systems in Lake County (65%) are also privately owned.
Does Aqua Ohio - Mentor have drinking water violations?
EPA's records list 3 violations for this system; 1 is health-based, and the most recent began in January 2025. The violations listed here began between March 1996 and January 2025. By type: 2 monitoring and reporting and 1 contaminant level above the legal limit. The contaminant or rule involved most often is Total coliform bacteria (TCR) (2 of them). EPA lists 3 as resolved. 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.
| Began | Violation | Contaminant or rule | Health-based | Status |
|---|---|---|---|---|
| 2025-01-01 | Monitoring and reportingWater Quality Parameter M/R · code 53 | Lead and Copper Rulecode 5000 | No | Resolved |
| 2009-01-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 1996-03-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Acute (TCR) · code 21 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
All 3 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.
Aqua Ohio - Mentor: frequently asked questions
Who runs Aqua Ohio - Mentor?
Aqua Ohio - Mentor (PWSID OH4301511) is a community water system privately owned. It is regulated by the OH state drinking water program.
How many people does Aqua Ohio - Mentor serve?
Aqua Ohio - Mentor reports serving 74,500 people through 32,735 service connections in Lake County, Ohio.
Where does Aqua Ohio - Mentor get its water?
EPA SDWIS lists this system's primary water source as surface water. Surface water means the system draws its water from rivers, lakes, streams or reservoirs.
Does Aqua Ohio - Mentor have any drinking water violations?
EPA's records list 3 violations for this system; 1 is health-based, and the most recent began in January 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 Aqua Ohio - Mentor'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 3 violations for this system; 1 is health-based, and the most recent began in January 2025. For current results, consult the system's annual water quality report, EPA ECHO, or the OH state drinking water program.
Where can I find Aqua Ohio - Mentor's water quality report?
As a community water system, Aqua Ohio - Mentor 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 Lake County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Lake County West Water Subdistrict | Lake | 78,379 | Community | Surface water |
| Lake County East Water Subdistrict | Lake | 40,656 | Community | Surface water |
| Painesville City Pws | Lake | 31,728 | Community | Surface water |
| Fairport Harbor Village Pws | Lake | 3,180 | Community | Purchased surface water |
| Lake County Pinecrest Subdistrict | Lake | 298 | Community | Purchased surface water |
| Standing Rock Farms | Lake | 252 | 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, “Aqua Ohio - Mentor, PWSID OH4301511, Ohio”, https://aquacensus.com/water-systems/ohio/aqua-ohio-mentor-oh4301511 (data as of October 1, 2026).