Black Rock WW Treatment Fac.
Main St., Black Rock, AR 72415 · Lawrence County · Publicly Owned Treatment Works
- Average flow
- 0.05 MGD
- Design flow
- 0.17 MGD
- NPDES permit
- AR0037508
- Administratively continued
- Permit expires
- October 2025
- Population served
- 592
- CWNS 2022
Black Rock WW Treatment Fac. is a publicly owned wastewater treatment works in Black Rock, Lawrence County, Arkansas treating an average of 0.05 million gallons per day against a permitted design capacity of 0.17 MGD, serving about 592 residents. It discharges under NPDES permit AR0037508 (administratively continued), which expires in October 2025, with 89 recorded violations in the last three years.
Treatment technology
One treatment structure or unit process identified at Black Rock WW Treatment Fac..
Available with a free Klarifi account
See the full treatment train at Black Rock WW Treatment Fac.: structures, unit processes and planned upgrades, with exact unit counts.
Compliance snapshot (last 3 years)
- Total violations
- 89
- Effluent violations
- 2
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
Decision-makers at Black Rock WW Treatment Fac..
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Pocahontas · 11 mi away
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Black Rock WW Treatment Fac.: 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