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Lockesburg, City of

Sewage treatment plant, Lockesburg, Arkansas. NPDES permit AR0021377 expired Jun 30, 2025; its limits still apply. Last 12 months: over a limit 10 times (last July 2026), 8 of 17 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 25 days after each period: form A monthly (18 values), form B every 2 months
Last report on file
August 2026
Oct 2024 – Sep 2025
0 values over a limit, 0 required values missing, 4 of 18 reports late

Last 12 months (Oct 1, 2025 – Sep 30, 2026)

Period endingParameterReportedLimitOver by
December 2025Chlorine, total residual, instantaneous maximum.16 mg/L≤ .011 mg/L1355%
December 2025pH, maximum9.4 SU≤ 9 SU—
February 2026Chlorine, total residual, instantaneous maximum.18 mg/L≤ .011 mg/L1536%
April 2026Chlorine, total residual, instantaneous maximum.09 mg/L≤ .011 mg/L718%
June 2026Chlorine, total residual, instantaneous maximum.09 mg/L≤ .011 mg/L718%
June 2026Coliform, fecal general, 30-day geometric mean> 2420 #/100mL≤ 1000 #/100mL—
June 2026Coliform, fecal general, 7-day geometric mean> 2420 #/100mL≤ 2000 #/100mL—
June 2026Solids, total suspended, monthly average71.72 lb/d≤ 50 lb/d43%
July 2026Coliform, fecal general, 30-day geometric mean> 2420 #/100mL≤ 1000 #/100mL—
July 2026Coliform, fecal general, 7-day geometric mean> 2420 #/100mL≤ 2000 #/100mL—

Limits in force (23)

ParameterStatisticLimitMonths
Oxygen, dissolved [DO]instantaneous minimum≥ 2 mg/LMay–Oct
Oxygen, dissolved [DO]instantaneous minimum≥ 4.3 mg/LJan, Feb, Mar, Apr, Nov, Dec
BOD, 5-day, 20 deg. Cmonthly average≤ 20 mg/LJan, Feb, Mar, Apr, Nov, Dec
BOD, 5-day, 20 deg. C7-day average≤ 30 mg/LJan, Feb, Mar, Apr, Nov, Dec
BOD, 5-day, 20 deg. Cmonthly average≤ 25 lb/dJan, Feb, Mar, Apr, Nov, Dec
pHminimum≥ 6 SUall year
pHmaximum≤ 9 SUall year
Solids, total suspendedmonthly average≤ 40 mg/Lall year
Solids, total suspended7-day average≤ 60 mg/Lall year
Solids, total suspendedmonthly average≤ 50 lb/dall year
Nitrogen, ammonia total [as N]monthly average≤ 7 mg/LMay–Oct
Nitrogen, ammonia total [as N]7-day average≤ 10.5 mg/LMay–Oct
Nitrogen, ammonia total [as N]monthly average≤ 8.8 lb/dMay–Oct
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year
Chlorine, total residualinstantaneous maximum≤ .011 mg/Lall year
Coliform, fecal general30-day geometric mean≤ 1000 #/100mLall year
Coliform, fecal general7-day geometric mean≤ 2000 #/100mLall year
Overflowsmonthly totalreport only (occur/mo)all year
Overflow volume [SS0 volume, CSO volume]monthly totalreport only (gal)all year
BOD, carbonaceous [5 day, 20 C]monthly average≤ 20 mg/LMay–Oct
BOD, carbonaceous [5 day, 20 C]7-day average≤ 30 mg/LMay–Oct
BOD, carbonaceous [5 day, 20 C]monthly average≤ 25 lb/dMay–Oct

How strict are these limits?

Cited limits by parameter: Arkansas's rules and the federal ones.

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/AR0021377 · MCP: https://passage-data.com/mcp