Metropolitan Sewer Dis Little Miami WWTP

The address on the plant’s EPA facility record is 225 Wilmer Avenue, Cincinnati, OH 45226, in Hamilton County. Its coordinates are 39.1039, -84.4327. For some plants the record holds the utility’s mailing address rather than the plant gate.

Metropolitan Sewer Dis Little Miami WWTP treats an average of 44.32 MGD and is permitted for a design flow of 55 MGD.

EPA's enforcement records list 1 formal civil enforcement case naming Metropolitan Sewer Dis Little Miami WWTP, 0 since fiscal year 2020. The latest case reached its current status in May 2025 (judicial case, final order entered). Penalties assessed across the cases total $1,200,000. The full case history, with milestones, violation types and EPA's case summaries, is shown in Klarifi with a free account.

Klarifi has identified 2 treatment structures and unit processes at the Cincinnati facility. The full treatment train, with exact unit counts, is shown in Klarifi with a free account.

The facility discharges under NPDES permit OH0025453, currently effective, expiring June 2030.

Discharge monitoring reports show 8 violations at Metropolitan Sewer Dis Little Miami WWTP in the last three years, 2 of them effluent limit exceedances. The full history is available in Klarifi.

Metropolitan Sewer Dis Little Miami WWTP is a publicly owned treatment works in Cincinnati, Ohio. Klarifi lists 2 verified decision-maker contacts for this facility, available with a free trial.