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Oppelo, City of - Oppelo Municipal Sewage Treatment Plant

Sewage treatment plant, Oppelo, Arkansas. NPDES permit AR0047643, in force until Nov 30, 2026. Last 12 months: over a limit 13 times (last July 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 25 days after each period: outfall 001 form A monthly (19 values), outfall 002 form A monthly (15 values)
Renewal application due
Jun 3, 2026 · 180 days before expiry; your permit may set another date
Last report on file
September 2026
Oct 2024 – Sep 2025
5 values over a limit, 8 required values missing, 1 of 24 reports late

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

All 13 values over a limit
Period endingParameterReportedLimitOver by
October 2025Oxygen, dissolved [DO], instantaneous minimum1.55 mg/L≥ 2 mg/L23%
November 2025Coliform, fecal general, 30-day geometric mean1073.6 #/100mL≤ 1000 #/100mL7%
November 2025Coliform, fecal general, 7-day geometric mean> 2419.6 #/100mL≤ 2000 #/100mL—
November 2025Oxygen, dissolved [DO], instantaneous minimum1.88 mg/L≥ 2 mg/L6%
November 2025Solids, total suspended, monthly average38.2 mg/L≤ 30 mg/L27%
April 2026Solids, total suspended, monthly average36 mg/L≤ 30 mg/L20%
May 2026Solids, total suspended, monthly average33.5 mg/L≤ 30 mg/L12%
June 2026Coliform, fecal general, 7-day geometric mean610 #/100mL≤ 400 #/100mL53%
June 2026Oxygen, dissolved [DO], instantaneous minimum1.97 mg/L≥ 2 mg/L2%
July 2026Coliform, fecal general, 30-day geometric mean15492.2 #/100mL≤ 200 #/100mL7646%
July 2026Coliform, fecal general, 7-day geometric mean2400 #/100mL≤ 400 #/100mL500%
July 2026Oxygen, dissolved [DO], instantaneous minimum1.53 mg/L≥ 2 mg/L24%
July 2026Solids, total suspended, monthly average40.5 mg/L≤ 30 mg/L35%

Limits in force (46)

ParameterStatisticLimitMonthsOutfall
Oxygen, dissolved [DO]instantaneous minimum≥ 2 mg/LJan, Feb, Mar, Apr, Nov, Dec001
Oxygen, dissolved [DO]instantaneous minimum≥ 3 mg/LMay–Oct001
pHminimum≥ 6 SUall year001
pHmaximum≤ 9 SUall year001
Solids, total suspendedmonthly average≤ 20 mg/Lall year001
Solids, total suspended7-day average≤ 30 mg/Lall year001
Solids, total suspendedmonthly average≤ 16.7 lb/dall year001
Nitrogen, ammonia total [as N]monthly average≤ 5 mg/LMay–Oct001
Nitrogen, ammonia total [as N]monthly average≤ 10 mg/LJan, Feb, Mar, Nov, Dec001
Nitrogen, ammonia total [as N]monthly average≤ 5.6 mg/LApr001
Nitrogen, ammonia total [as N]7-day average≤ 7.5 mg/LMay–Oct001
Nitrogen, ammonia total [as N]7-day average≤ 15 mg/LJan, Feb, Mar, Nov, Dec001
Nitrogen, ammonia total [as N]7-day average≤ 5.6 mg/LApr001
Nitrogen, ammonia total [as N]monthly average≤ 4.2 lb/dMay–Oct001
Nitrogen, ammonia total [as N]monthly average≤ 8.3 lb/dJan, Feb, Mar, Nov, Dec001
Nitrogen, ammonia total [as N]monthly average≤ 4.7 lb/dApr001
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year001
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year001
Chlorine, total residualinstantaneous maximumreport only (mg/L)all year001
Coliform, fecal general30-day geometric mean≤ 1000 #/100mLall year001
Coliform, fecal general7-day geometric mean≤ 2000 #/100mLall year001
Overflowsmonthly totalreport only (occur/mo)all year001
Overflow volume [SS0 volume, CSO volume]monthly totalreport only (gal)all year001
BOD, carbonaceous [5 day, 20 C]monthly average≤ 20 mg/LJan, Feb, Mar, Apr, Nov, Dec001
BOD, carbonaceous [5 day, 20 C]monthly average≤ 15 mg/LMay–Oct001
BOD, carbonaceous [5 day, 20 C]7-day average≤ 30 mg/LJan, Feb, Mar, Apr, Nov, Dec001
BOD, carbonaceous [5 day, 20 C]7-day average≤ 23 mg/LMay–Oct001
BOD, carbonaceous [5 day, 20 C]monthly average≤ 16.7 lb/dJan, Feb, Mar, Apr, Nov, Dec001
BOD, carbonaceous [5 day, 20 C]monthly average≤ 12.5 lb/dMay–Oct001
Oxygen, dissolved [DO]instantaneous minimum≥ 2 mg/Lall year002
BOD, 5-day, 20 deg. Cmonthly average≤ 30 mg/Lall year002
BOD, 5-day, 20 deg. C7-day average≤ 45 mg/Lall year002
BOD, 5-day, 20 deg. Cmonthly average≤ 25 lb/dall year002
pHminimum≥ 6 SUall year002
pHmaximum≤ 9 SUall year002
Solids, total suspendedmonthly average≤ 30 mg/Lall year002
Solids, total suspended7-day average≤ 45 mg/Lall year002
Solids, total suspendedmonthly average≤ 25 lb/dall year002
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year002
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year002
Coliform, fecal general30-day geometric mean≤ 200 #/100mLMay–Sep002
Coliform, fecal general30-day geometric mean≤ 1000 #/100mLJan, Feb, Mar, Apr, Oct, Nov, Dec002
Coliform, fecal general7-day geometric mean≤ 400 #/100mLMay–Sep002
Coliform, fecal general7-day geometric mean≤ 2000 #/100mLJan, Feb, Mar, Apr, Oct, Nov, Dec002
Overflowsmonthly totalreport only (occur/mo)all year002
Overflow volume [SS0 volume, CSO volume]monthly totalreport only (gal)all year002

How strict are these limits?

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

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Your permit document is the final word. As JSON: /api/v1/permits/AR0047643 · MCP: https://passage-data.com/mcp