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Cotton Plant, City of

Sewage treatment plant, Cotton Plant, Arkansas. NPDES permit AR0033391 expired Feb 29, 2024; its limits still apply. Last 12 months: over a limit 62 times (last August 2026), 68 required values missing, 7 of 11 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 25 days after each period: form A monthly (17 values)
Last report on file
August 2026
Oct 2024 – Sep 2025
32 values over a limit, 102 required values missing, 10 of 12 reports late

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

All 62 values over a limit
Period endingParameterReportedLimitOver by
October 2025Coliform, fecal general, 30-day geometric mean> 2420 #/100mL≤ 1000 #/100mL—
October 2025Coliform, fecal general, 30-day geometric mean> 2420 #/100mL≤ 1000 #/100mL—
October 2025Coliform, fecal general, 7-day geometric mean> 2420 #/100mL≤ 2000 #/100mL—
October 2025Coliform, fecal general, 7-day geometric mean> 2420 #/100mL≤ 2000 #/100mL—
October 2025Nitrogen, ammonia total [as N], 7-day average6.83 mg/L≤ 6 mg/L14%
October 2025Nitrogen, ammonia total [as N], 7-day average6.83 mg/L≤ 6 mg/L14%
October 2025Nitrogen, ammonia total [as N], monthly average5.15 mg/L≤ 4 mg/L29%
October 2025Nitrogen, ammonia total [as N], monthly average5.15 mg/L≤ 4 mg/L29%
November 2025Coliform, fecal general, 30-day geometric mean> 2420 #/100mL≤ 1000 #/100mL—
November 2025Coliform, fecal general, 7-day geometric mean> 2420 #/100mL≤ 2000 #/100mL—
November 2025Oxygen, dissolved [DO], instantaneous minimum4.19 mg/L≥ 6 mg/L30%
December 2025Coliform, fecal general, 30-day geometric mean> 2420 #/100mL≤ 1000 #/100mL—
December 2025Coliform, fecal general, 7-day geometric mean> 2420 #/100mL≤ 2000 #/100mL—
January 2026BOD, carbonaceous [5 day, 20 C], monthly average21.05 mg/L≤ 20 mg/L5%
January 2026BOD, carbonaceous [5 day, 20 C], monthly average21.05 mg/L≤ 20 mg/L5%
January 2026Coliform, fecal general, 30-day geometric mean> 2420 #/100mL≤ 1000 #/100mL—
January 2026Coliform, fecal general, 30-day geometric mean> 2420 #/100mL≤ 1000 #/100mL—
January 2026Coliform, fecal general, 7-day geometric mean> 2420 #/100mL≤ 2000 #/100mL—
January 2026Coliform, fecal general, 7-day geometric mean> 2420 #/100mL≤ 2000 #/100mL—
February 2026BOD, carbonaceous [5 day, 20 C], 7-day average36.3 mg/L≤ 30 mg/L21%
February 2026BOD, carbonaceous [5 day, 20 C], 7-day average36.3 mg/L≤ 30 mg/L21%
February 2026BOD, carbonaceous [5 day, 20 C], monthly average29.29 mg/L≤ 20 mg/L46%
February 2026BOD, carbonaceous [5 day, 20 C], monthly average29.29 mg/L≤ 20 mg/L46%
February 2026Coliform, fecal general, 30-day geometric mean> 2420 #/100mL≤ 1000 #/100mL—
February 2026Coliform, fecal general, 30-day geometric mean> 2420 #/100mL≤ 1000 #/100mL—
February 2026Coliform, fecal general, 7-day geometric mean> 2420 #/100mL≤ 2000 #/100mL—
February 2026Coliform, fecal general, 7-day geometric mean> 2420 #/100mL≤ 2000 #/100mL—
February 2026Nitrogen, ammonia total [as N], 7-day average15 mg/L≤ 14.7 mg/L2%
February 2026Nitrogen, ammonia total [as N], 7-day average15 mg/L≤ 14.7 mg/L2%
February 2026Nitrogen, ammonia total [as N], monthly average13.15 mg/L≤ 10 mg/L32%
February 2026Nitrogen, ammonia total [as N], monthly average13.15 mg/L≤ 10 mg/L32%
February 2026Oxygen, dissolved [DO], instantaneous minimum5.2 mg/L≥ 6 mg/L13%
February 2026Oxygen, dissolved [DO], instantaneous minimum5.2 mg/L≥ 6 mg/L13%
March 2026Coliform, fecal general, 30-day geometric mean1254 #/100mL≤ 1000 #/100mL25%
March 2026Coliform, fecal general, 7-day geometric mean> 2420 #/100mL≤ 2000 #/100mL—
April 2026BOD, carbonaceous [5 day, 20 C], 7-day average31.2 mg/L≤ 30 mg/L4%
April 2026BOD, carbonaceous [5 day, 20 C], monthly average24.6 mg/L≤ 20 mg/L23%
April 2026Coliform, fecal general, 30-day geometric mean> 2420 #/100mL≤ 1000 #/100mL—
April 2026Coliform, fecal general, 7-day geometric mean> 2420 #/100mL≤ 2000 #/100mL—
April 2026Nitrogen, ammonia total [as N], 7-day average16.4 mg/L≤ 5.2 mg/L215%
April 2026Nitrogen, ammonia total [as N], monthly average14.05 mg/L≤ 5.2 mg/L170%
April 2026Oxygen, dissolved [DO], instantaneous minimum5.26 mg/L≥ 6 mg/L12%
May 2026Coliform, fecal general, 30-day geometric mean> 2420 #/100mL≤ 1000 #/100mL—
May 2026Coliform, fecal general, 30-day geometric mean> 2420 #/100mL≤ 1000 #/100mL—
May 2026Coliform, fecal general, 7-day geometric mean> 2420 #/100mL≤ 2000 #/100mL—
May 2026Coliform, fecal general, 7-day geometric mean> 2420 #/100mL≤ 2000 #/100mL—
May 2026Nitrogen, ammonia total [as N], 7-day average10.6 mg/L≤ 6 mg/L77%
May 2026Nitrogen, ammonia total [as N], 7-day average10.6 mg/L≤ 6 mg/L77%
May 2026Nitrogen, ammonia total [as N], monthly average9.18 mg/L≤ 4 mg/L130%
May 2026Nitrogen, ammonia total [as N], monthly average9.18 mg/L≤ 4 mg/L130%
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 2026Nitrogen, ammonia total [as N], 7-day average14.7 mg/L≤ 6 mg/L145%
June 2026Nitrogen, ammonia total [as N], monthly average10.8 mg/L≤ 4 mg/L170%
July 2026Coliform, fecal general, 7-day geometric mean> 2420 #/100mL≤ 2000 #/100mL—
July 2026Nitrogen, ammonia total [as N], 7-day average18 mg/L≤ 6 mg/L200%
July 2026Nitrogen, ammonia total [as N], monthly average9.25 mg/L≤ 4 mg/L131%
July 2026Oxygen, dissolved [DO], instantaneous minimum2.45 mg/L≥ 4 mg/L39%
August 2026Coliform, fecal general, 30-day geometric mean> 2420 #/100mL≤ 1000 #/100mL—
August 2026Coliform, fecal general, 7-day geometric mean> 2420 #/100mL≤ 2000 #/100mL—
August 2026Nitrogen, ammonia total [as N], 7-day average19.2 mg/L≤ 6 mg/L220%
August 2026Nitrogen, ammonia total [as N], monthly average9.9 mg/L≤ 4 mg/L148%

Limits in force (24)

ParameterStatisticLimitMonths
Oxygen, dissolved [DO]instantaneous minimum≥ 4 mg/LMay–Oct
Oxygen, dissolved [DO]instantaneous minimum≥ 6 mg/LJan, Feb, Mar, Apr, Nov, Dec
pHminimum≥ 6 SUall year
pHmaximum≤ 9 SUall year
Solids, total suspendedmonthly average≤ 20 mg/Lall year
Solids, total suspended7-day average≤ 30 mg/Lall year
Solids, total suspendedmonthly average≤ 66.7 lb/dall year
Nitrogen, ammonia total [as N]monthly average≤ 5.2 mg/LApr
Nitrogen, ammonia total [as N]monthly average≤ 10 mg/LJan, Feb, Mar, Nov, Dec
Nitrogen, ammonia total [as N]monthly average≤ 4 mg/LMay–Oct
Nitrogen, ammonia total [as N]7-day average≤ 5.2 mg/LApr
Nitrogen, ammonia total [as N]7-day average≤ 14.7 mg/LJan, Feb, Mar, Nov, Dec
Nitrogen, ammonia total [as N]7-day average≤ 6 mg/LMay–Oct
Nitrogen, ammonia total [as N]monthly average≤ 17.3 lb/dApr
Nitrogen, ammonia total [as N]monthly average≤ 33.4 lb/dJan, Feb, Mar, Nov, Dec
Nitrogen, ammonia total [as N]monthly average≤ 13.3 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 maximumreport only (mg/L)all year
Coliform, fecal general30-day geometric mean≤ 1000 #/100mLall year
Coliform, fecal general7-day geometric mean≤ 2000 #/100mLall year
BOD, carbonaceous [5 day, 20 C]monthly average≤ 20 mg/Lall year
BOD, carbonaceous [5 day, 20 C]7-day average≤ 30 mg/Lall year
BOD, carbonaceous [5 day, 20 C]monthly average≤ 66.7 lb/dall year

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/AR0033391 · MCP: https://passage-data.com/mcp