Mechanicsburg WWTP
90 Mill St, Mechanicsburg, OH 43044 · Champaign County · Publicly Owned Treatment Works
- Average flow
- 0.17 MGD
- Design flow
- 0.23 MGD
- NPDES permit
- OH0022209
- Effective
- Permit expires
- December 2027
- Population served
- 1,921
- CWNS 2022
Mechanicsburg WWTP is a publicly owned wastewater treatment works in Mechanicsburg, Champaign County, Ohio treating an average of 0.17 million gallons per day against a permitted design capacity of 0.23 MGD, serving about 1,921 residents. It discharges under NPDES permit OH0022209 (effective), which expires in December 2027, with 243 recorded violations in the last three years. EPA has recorded 1 formal enforcement action naming the plant, the latest in May 2022.
Treatment technology
2 treatment structures and unit processes identified at Mechanicsburg WWTP.
Available with a free Klarifi account
See the full treatment train at Mechanicsburg WWTP: structures, unit processes and planned upgrades, with exact unit counts.
Compliance snapshot (last 3 years)
- Total violations
- 243
- Effluent violations
- 140
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
EPA enforcement history
Federal civil enforcement cases, compliance inspections and informal actions recorded for Mechanicsburg WWTP in EPA's ICIS system.
- Formal actions
- 1
- 1 since FY2020
- EPA inspections
- 0
- none on record
Latest case · May 2022
Mechanicsburg, Village of AOC
Administrative order · CWA, NPDES Permit Violations · Final Order Issued
EPA's description of the case:
“AOC will guide facility through the lengthy process of eliminating sewer inflow and infiltration, whic is belived to be the main case of facility's violations.”
Source: EPA ECHO, civil enforcement case 05-2022-0318.
Full case history with a free Klarifi account
Every action against Mechanicsburg WWTP with dates, milestones, violation types and EPA's complete case summaries, plus inspections and informal actions.
Key contacts
Decision-makers at Mechanicsburg WWTP.
No verified contacts on file yet
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Nearby wastewater treatment plants in Ohio
Catawba · 8 mi away
0.24 MGD
London · 8 mi away
0.02 MGD
London · 9 mi away
0.0057 MGD
Milford Center · 10 mi away
0.0049 MGD
N Lewisburg · 11 mi away
0.14 MGD
South Vienna · 12 mi away
—
Urbana · 12 mi away
0.006 MGD
London · 13 mi away
0.06 MGD
Mechanicsburg WWTP: frequently asked questions
Sources and methodology
Flow, permit and violation figures come from the EPA's ICIS-NPDES discharge monitoring records. Population served comes from the Clean Watersheds Needs Survey 2022. Treatment structures are identified by Klarifi's review of aerial imagery, and capital improvement projects are extracted from published municipal budget documents. Violations are counted over the last three years of monitoring reports.
Data refreshed October 26, 2026; facility record last updated August 18, 2026.
Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · Activated sludge · Oxidation ditch · all terms