Portsmouth Lawson Run WWTP
2040 Charles St., Portsmouth, OH 45662 · Scioto County · Publicly Owned Treatment Works
- Average flow
- 4.57 MGD
- Design flow
- 6.5 MGD
- NPDES permit
- OH0027197
- Effective
- Permit expires
- December 2030
- Population served
- 19,370
- CWNS 2022
Portsmouth Lawson Run WWTP is a publicly owned wastewater treatment works in Portsmouth, Scioto County, Ohio treating an average of 4.57 million gallons per day against a permitted design capacity of 6.5 MGD, serving about 19,370 residents. It discharges under NPDES permit OH0027197 (effective), which expires in December 2030, with 1 recorded violation in the last three years. EPA has recorded 2 formal enforcement actions naming the plant, the latest in October 2022.
Treatment technology
2 treatment structures and unit processes identified at Portsmouth Lawson Run WWTP.
Available with a free Klarifi account
See the full treatment train at Portsmouth Lawson Run WWTP: structures, unit processes and planned upgrades, with exact unit counts.
Compliance snapshot (last 3 years)
- Total violations
- 1
- Effluent violations
- 1
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 Portsmouth Lawson Run WWTP in EPA's ICIS system.
- Formal actions
- 2
- 0 since FY2020
- Penalties assessed
- $32,500
- all cases
- Compliance actions
- $5M
- required by EPA orders
- EPA inspections
- 0
- none on record
Latest case · Oct 2022
City of Portsmouth
Administrative order · CWA, NPDES Permit Violations · Final Order No Penalty · Compliance actions $5M · The case also names 1 other plant, and its amounts cover all of them
EPA's description of the case:
“AOC issued to address CSOs/SSOs”
Source: EPA ECHO, civil enforcement case 05-2013-0326.
Full case history with a free Klarifi account
Every action against Portsmouth Lawson Run WWTP with dates, milestones, violation types and EPA's complete case summaries, plus inspections and informal actions.
Key contacts
1 verified contact for Portsmouth Lawson Run WWTP, with validated emails and direct phone numbers.
Unlock 1 verified contact
Names, validated emails and direct phone numbers for decision-makers at Portsmouth Lawson Run WWTP, plus the full compliance history and discharge data.
Nearby wastewater treatment plants in Ohio
West Portsmouth · 4 mi away
0.22 MGD
West Portsmouth · 5 mi away
0.03 MGD
Portsmouth · 5 mi away
0.3 MGD
Wheelersburg · 6 mi away
0.9 MGD
Lucasville · 9 mi away
0.57 MGD
Wheelersburg · 10 mi away
0.02 MGD
Portsmouth · 10 mi away
0.01 MGD
Portsmouth · 12 mi away
0.0064 MGD
Portsmouth Lawson Run 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 February 28, 2025.
Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · Ozonation · Activated sludge · all terms