Ecw&sa Johnston #1 WWTP
PO Box 416, Edgefield, SC 29824 · Edgefield County · Publicly Owned Treatment Works
- Average flow
- 0.18 MGD
- Design flow
- 0.97 MGD
- NPDES permit
- SC0025691
- Administratively continued
- Permit expires
- July 2021
- Population served
- —
- CWNS 2022
Ecw&sa Johnston #1 WWTP is a publicly owned wastewater treatment works in Edgefield, Edgefield County, South Carolina treating an average of 0.18 million gallons per day against a permitted design capacity of 0.97 MGD. It discharges under NPDES permit SC0025691 (administratively continued), which expires in July 2021, with 0 recorded violations in the last three years. EPA has recorded 1 formal enforcement action naming the plant, the latest in June 2010.
Treatment technology
One treatment structure or unit process identified at Ecw&sa Johnston #1 WWTP.
Available with a free Klarifi account
See the full treatment train at Ecw&sa Johnston #1 WWTP: structures, unit processes and planned upgrades, with exact unit counts.
Compliance snapshot (last 3 years)
- Total violations
- 0
- Effluent violations
- 0
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 Ecw&sa Johnston #1 WWTP in EPA's ICIS system.
- Formal actions
- 1
- 0 since FY2020
- Compliance actions
- $100
- required by EPA orders
- EPA inspections
- 0
- none on record
Latest case · Jun 2010
EDGEFIELD COUNTY WATER AND SEWER AUTHORITY
Administrative order · CWA, NPDES Permit Violations · Unilateral Administrative Order Without Adjudication · Compliance actions $100
Source: EPA ECHO, civil enforcement case 04-2009-4806.
Full case history with a free Klarifi account
Every action against Ecw&sa Johnston #1 WWTP with dates, milestones, violation types and EPA's complete case summaries, plus inspections and informal actions.
Key contacts
Decision-makers at Ecw&sa Johnston #1 WWTP.
No verified contacts on file yet
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Nearby wastewater treatment plants in South Carolina
Saluda · 13 mi away
—
Batesburg · 15 mi away
0.8 MGD
Ninety Six · 25 mi away
0.3 MGD
Wagener · 27 mi away
0.04 MGD
Newberry · 30 mi away
2.3 MGD
Springfield · 37 mi away
—
Chapin · 37 mi away
0.99 MGD
Springfield · 37 mi away
0.04 MGD
Ecw&sa Johnston #1 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 March 7, 2025.
Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · Anaerobic digester · Lift station · all terms