Westerville Water Quality
Ohio
According to EPA SDWIS, Westerville, Ohio is served by 8 community water systems covering about 28,829 people. The same extract lists 5 health-based violation records, most recently coded 2950 in 2024. Counts are historical EPA registry rows, not a current compliance or drinkability score.
Drinking water in Westerville, Ohio is delivered through 8 EPA-regulated community water systems serving an estimated 28,829 people. Each system is tracked in the EPA Safe Drinking Water Information System (SDWIS) under the Safe Drinking Water Act, which requires testing for regulated contaminants, consumer notification of violations, and publication of an annual Consumer Confidence Report.
PlainEnviro's health-based SDWIS extract shows 5 violation records across the 8 active community systems shown here. Monitoring and reporting records are not present in the extract. The records carry 2 distinct EPA contaminant codes: TTHM, Stage 1 Disinfectants and Disinfection Byproducts Rule. 1 TRI-reporting industrial facility is also located within the city limits.
A past EPA health-based registry row does not describe water delivered today or current compliance status; utilities notify customers and remediate under state primacy oversight when required. For current water-quality status and treatment practices, review your local utility's most recent Consumer Confidence Report or contact the Ohio drinking water program. All records above reflect federal EPA SDWIS data and are not independently verified against state databases.
Community Water Systems
| System Name | Pop. Served | Violations | Status |
|---|---|---|---|
| AQUA OHIO - LAWRENCE COUNTY | 8,130 | 3 | Health |
| AQUA OHIO - BLACKLICK | 7,100 | 0 | Clean |
| AQUA OHIO - HUBER RIDGE PWS | 5,393 | 0 | Clean |
| AQUA OHIO - LAKE DARBY | 3,562 | 0 | Clean |
| AQUA OHIO - WORTHINGTON HILLS PWS | 2,500 | 0 | Clean |
| AQUA OHIO - LAKE WHITE PWS | 1,229 | 0 | Clean |
| AQUA OHIO - TIMBERBROOK PW | 865 | 0 | Clean |
| THE LAURELS OF FULTON | 50 | 2 | Health |
Does this city have health-based water violations?
These health-based records can represent Maximum Contaminant Level (MCL), Treatment Technique (TT), or Maximum Residual Disinfectant Level (MRDL) categories. A historical record does not establish that water is currently unsafe.
| Water system | Contaminant | Begin Date |
|---|---|---|
| AQUA OHIO - LAWRENCE COUNTY | TTHM | 2024-10-01 |
| AQUA OHIO - LAWRENCE COUNTY | TTHM | 2024-10-01 |
| AQUA OHIO - LAWRENCE COUNTY | TTHM | 2024-10-01 |
| THE LAURELS OF FULTON | Stage 1 Disinfectants and Disinfection Byproducts Rule | 2021-01-15 |
| THE LAURELS OF FULTON | Stage 1 Disinfectants and Disinfection Byproducts Rule | 2021-01-15 |
What are Westerville's health-based records for?
Westerville's health-based violation records carry 2 distinct EPA codes: some name a substance, others the drinking-water rule that was breached. Counts are records on file in the EPA SDWIS extract, not current test results.
| Contaminant | Records | Systems |
|---|---|---|
| Tthm | 3 | 1 |
| Stage 1 Disinfectants and Disinfection Byproducts Rule | 2 | 1 |
TRI Facilities in Westerville
| Facility | Total Releases |
|---|---|
| Worthington Cylinders Corp | 735 lbs |
Frequently Asked Questions
What does EPA SDWIS list for drinking water in Westerville, Ohio? ▼
How many water violations does Westerville have in this EPA extract? ▼
What contaminants were found in Westerville water? ▼
How many water systems serve Westerville? ▼
Where does Westerville get its drinking water? ▼
Are there pollution sources near Westerville? ▼
How does Westerville compare in Ohio?
Of the 581 Ohio places with at least one community water system on file, Westerville ranks #10 by number of systems (8).
Either side of it: Wooster (10), Chardon (9), Crooksville (7), Dayton (7)
About This Data
Figures here are the current EPA SDWIS extract joined to the 8 community water systems whose service area lists Westerville, ranked against the 581 Ohio places with at least one system on file. Data current as of 2026-08-25.
Water system data comes from the EPA's Safe Drinking Water Information System (SDWIS). PlainEnviro's violation fetch is restricted upstream to records EPA flags as health-based and then joined to active community water systems. Monitoring and reporting violations are not included.
A health-based violation row in this extract is a historical EPA registry entry. It does not describe water delivered today or current compliance status. Many records are later resolved, and public water systems notify customers when required. For current conditions, contact your local water utility or the state drinking water program.
TRI facility data comes from the EPA Toxic Release Inventory. Facilities shown are those that self-report to the TRI program. PlainEnviro presents this data without advocacy framing.
Read our methodology - how this data is sourced, computed, and verified.