Walnut Ridge WW Treatment Plnt
1002 Oak St, Walnut Ridge, AR 72476 · Lawrence County · Publicly Owned Treatment Works
- Average flow
- 0.31 MGD
- Design flow
- —
- NPDES permit
- ARL046566
- Effective
- Permit expires
- December 2030
- Population served
- 5,386
- CWNS 2022
Walnut Ridge WW Treatment Plnt is a publicly owned wastewater treatment works in Walnut Ridge, Lawrence County, Arkansas treating an average of 0.31 million gallons per day, serving about 5,386 residents. It discharges under NPDES permit ARL046566 (effective), which expires in December 2030, with 256 recorded violations in the last three years. EPA has recorded 2 formal enforcement actions naming the plant, the latest in April 2017.
Treatment technology
2 treatment structures and unit processes identified at Walnut Ridge WW Treatment Plnt.
Available with a free Klarifi account
See the full treatment train at Walnut Ridge WW Treatment Plnt: structures, unit processes and planned upgrades, with exact unit counts.
Compliance snapshot (last 3 years)
- Total violations
- 256
- Effluent violations
- 256
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 Walnut Ridge WW Treatment Plnt in EPA's ICIS system.
- Formal actions
- 2
- 0 since FY2020
- Compliance actions
- $300
- required by EPA orders
- EPA inspections
- 0
- none on record
Latest case · Apr 2017
Walnut Ridge, City of
Administrative order · CWA, Sewage Sludge Disposal · Unilateral Administrative Order Without Adjudication · Compliance actions $200
EPA's description of the case:
“VIOLATION: AO issued for failure to submit Annual Sludge Discharge Monitoring Reports for calendar year 2014. RELIEF SOUGHT: Submit Annual Sludge Discharge Monitoring Reports.”
Source: EPA ECHO, civil enforcement case 06-2015-1788.
Full case history with a free Klarifi account
Every action against Walnut Ridge WW Treatment Plnt with dates, milestones, violation types and EPA's complete case summaries, plus inspections and informal actions.
Key contacts
1 verified contact for Walnut Ridge WW Treatment Plnt, with validated emails and direct phone numbers.
Unlock 1 verified contact
Names, validated emails and direct phone numbers for decision-makers at Walnut Ridge WW Treatment Plnt, plus the full compliance history and discharge data.
Nearby wastewater treatment plants in Arkansas
Hoxie · 2 mi away
0.15 MGD
Portia · 6 mi away
0.03 MGD
Black Rock · 7 mi away
0.05 MGD
Sedgwick · 9 mi away
0.01 MGD
O'Kean · 11 mi away
0.03 MGD
Pocahontas · 12 mi away
0.47 MGD
Alicia · 14 mi away
0.04 MGD
Imboden · 14 mi away
0.03 MGD
Walnut Ridge WW Treatment Plnt: 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 July 24, 2026.
Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · Biosolids · Filter press · all terms