Baltimore WWTP
Baltimore, OH · Fairfield County · Publicly Owned Treatment Works
- Average flow
- 0.33 MGD
- Design flow
- 1.01 MGD
- NPDES permit
- OH0023990
- Effective
- Permit expires
- June 2031
- Population served
- 2,992
- CWNS 2022
Baltimore WWTP is a publicly owned wastewater treatment works in Baltimore, Fairfield County, Ohio treating an average of 0.33 million gallons per day against a permitted design capacity of 1.01 MGD, serving about 2,992 residents. Treatment on site includes aerated lagoons, uncovered lagoons, biogas silos. It discharges under NPDES permit OH0023990 (effective), which expires in June 2031, with 5 recorded violations in the last three years.
Treatment technology
Treatment structures identified at this facility. Exact unit counts are available in Klarifi.
Compliance snapshot (last 3 years)
- Total violations
- 5
- Effluent violations
- 5
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
Decision-makers at Baltimore WWTP.
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Nearby wastewater treatment plants in Ohio
Baltimore · 4 mi away
0.12 MGD
Pickerington · 6 mi away
0.13 MGD
Millersport · 7 mi away
0.1 MGD
Canal Winchester · 7 mi away
0.16 MGD
Pickerington · 8 mi away
2.54 MGD
Lancaster · 8 mi away
0.0051 MGD
Lancaster · 8 mi away
0.0067 MGD
Kirkersville · 9 mi away
0.04 MGD
Baltimore 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 September 11, 2026; facility record last updated November 15, 2025.