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Portia, City of

Sewage treatment plant, Portia, Arkansas. NPDES permit AR0040355 expired Jan 31, 2026; its limits still apply. Last 12 months: over a limit 62 times (last August 2026), 16 required values missing, 4 of 11 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 25 days after each period: form A monthly (16 values)
Last report on file
August 2026
Oct 2024 – Sep 2025
18 values over a limit, 16 required values missing, 4 of 12 reports late

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

All 62 values over a limit
Period endingParameterReportedLimitOver by
October 2025BOD, 5-day, 20 deg. C, 7-day average66.9 mg/L≤ 45 mg/L49%
October 2025BOD, 5-day, 20 deg. C, 7-day average66.9 mg/L≤ 45 mg/L49%
October 2025BOD, 5-day, 20 deg. C, monthly average66.9 mg/L≤ 30 mg/L123%
October 2025BOD, 5-day, 20 deg. C, monthly average66.9 mg/L≤ 30 mg/L123%
October 2025Chlorine, total residual, instantaneous maximum1.03 mg/L≤ .3 mg/L243%
October 2025Chlorine, total residual, instantaneous maximum1.03 mg/L≤ .3 mg/L243%
October 2025Coliform, fecal general, 30-day geometric mean2400 #/100mL≤ 1000 #/100mL140%
October 2025Coliform, fecal general, 30-day geometric mean2400 #/100mL≤ 1000 #/100mL140%
October 2025Coliform, fecal general, 7-day geometric mean2400 #/100mL≤ 2000 #/100mL20%
October 2025Coliform, fecal general, 7-day geometric mean2400 #/100mL≤ 2000 #/100mL20%
October 2025Oxygen, dissolved [DO], instantaneous minimum< 1 mg/L≥ 2 mg/L—
October 2025Oxygen, dissolved [DO], instantaneous minimum< 1 mg/L≥ 2 mg/L—
November 2025BOD, 5-day, 20 deg. C, 7-day average96.3 mg/L≤ 45 mg/L114%
November 2025BOD, 5-day, 20 deg. C, monthly average96.3 mg/L≤ 30 mg/L221%
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 minimum1.31 mg/L≥ 2 mg/L35%
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, 5-day, 20 deg. C, 7-day average106 mg/L≤ 45 mg/L136%
January 2026BOD, 5-day, 20 deg. C, monthly average106 mg/L≤ 30 mg/L253%
January 2026Chlorine, total residual, instantaneous maximum2.2 mg/L≤ .3 mg/L633%
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 2026Solids, total suspended, 7-day average517 mg/L≤ 45 mg/L1049%
January 2026Solids, total suspended, monthly average107.8 lb/d≤ 22.5 lb/d379%
January 2026Solids, total suspended, monthly average517 mg/L≤ 30 mg/L1623%
February 2026Coliform, fecal general, 30-day geometric mean> 2420 #/100mL≤ 1000 #/100mL—
February 2026Coliform, fecal general, 7-day geometric mean> 2420 #/100mL≤ 2000 #/100mL—
March 2026Coliform, fecal general, 30-day geometric mean> 2420 #/100mL≤ 1000 #/100mL—
March 2026Coliform, fecal general, 7-day geometric mean> 2420 #/100mL≤ 2000 #/100mL—
April 2026BOD, 5-day, 20 deg. C, monthly average41.7 mg/L≤ 30 mg/L39%
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 2026Oxygen, dissolved [DO], instantaneous minimum1.86 mg/L≥ 2 mg/L7%
April 2026Solids, total suspended, monthly average31 mg/L≤ 30 mg/L3%
May 2026BOD, 5-day, 20 deg. C, 7-day average57.4 mg/L≤ 45 mg/L28%
May 2026BOD, 5-day, 20 deg. C, monthly average57.4 mg/L≤ 30 mg/L91%
May 2026Coliform, fecal general, 30-day geometric mean> 2420 #/100mL≤ 200 #/100mL—
May 2026Coliform, fecal general, 7-day geometric mean> 2420 #/100mL≤ 400 #/100mL—
May 2026Oxygen, dissolved [DO], instantaneous minimum1.8 mg/L≥ 2 mg/L10%
May 2026Solids, total suspended, monthly average40 mg/L≤ 30 mg/L33%
June 2026BOD, 5-day, 20 deg. C, 7-day average107 mg/L≤ 45 mg/L138%
June 2026BOD, 5-day, 20 deg. C, monthly average107 mg/L≤ 30 mg/L257%
June 2026Coliform, fecal general, 30-day geometric mean> 2420 #/100mL≤ 200 #/100mL—
June 2026Coliform, fecal general, 7-day geometric mean> 2420 #/100mL≤ 400 #/100mL—
June 2026Oxygen, dissolved [DO], instantaneous minimum< 1 mg/L≥ 2 mg/L—
June 2026Solids, total suspended, 7-day average49 mg/L≤ 45 mg/L9%
June 2026Solids, total suspended, monthly average49 mg/L≤ 30 mg/L63%
July 2026Coliform, fecal general, 30-day geometric mean> 2420 #/100mL≤ 200 #/100mL—
July 2026Coliform, fecal general, 7-day geometric mean> 2420 #/100mL≤ 400 #/100mL—
July 2026Oxygen, dissolved [DO], instantaneous minimum1.25 mg/L≥ 2 mg/L38%
July 2026Solids, total suspended, monthly average30.6 mg/L≤ 30 mg/L2%
August 2026BOD, 5-day, 20 deg. C, 7-day average92.1 mg/L≤ 45 mg/L105%
August 2026BOD, 5-day, 20 deg. C, monthly average28.42 lb/d≤ 22.5 lb/d26%
August 2026BOD, 5-day, 20 deg. C, monthly average92.1 mg/L≤ 30 mg/L207%
August 2026Coliform, fecal general, 30-day geometric mean> 2420 #/100mL≤ 200 #/100mL—
August 2026Coliform, fecal general, 7-day geometric mean> 2420 #/100mL≤ 400 #/100mL—
August 2026Oxygen, dissolved [DO], instantaneous minimum< 1 mg/L≥ 2 mg/L—
August 2026Solids, total suspended, 7-day average109 mg/L≤ 45 mg/L142%
August 2026Solids, total suspended, monthly average109 mg/L≤ 30 mg/L263%
August 2026Solids, total suspended, monthly average33.64 lb/d≤ 22.5 lb/d50%

Limits in force (18)

ParameterStatisticLimitMonths
Oxygen, dissolved [DO]instantaneous minimum≥ 2 mg/Lall year
BOD, 5-day, 20 deg. Cmonthly average≤ 30 mg/Lall year
BOD, 5-day, 20 deg. C7-day average≤ 45 mg/Lall year
BOD, 5-day, 20 deg. Cmonthly average≤ 22.5 lb/dall year
pHminimum≥ 6 SUall year
pHmaximum≤ 9 SUall year
Solids, total suspendedmonthly average≤ 30 mg/Lall year
Solids, total suspended7-day average≤ 45 mg/Lall year
Solids, total suspendedmonthly average≤ 22.5 lb/dall year
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≤ .3 mg/Lall year
Coliform, fecal general30-day geometric mean≤ 200 #/100mLMay–Sep
Coliform, fecal general30-day geometric mean≤ 1000 #/100mLJan, Feb, Mar, Apr, Oct, Nov, Dec
Coliform, fecal general7-day geometric mean≤ 400 #/100mLMay–Sep
Coliform, fecal general7-day geometric mean≤ 2000 #/100mLJan, Feb, Mar, Apr, Oct, Nov, Dec
Overflowsmonthly totalreport only (occur/mo)all year
Overflow volume [SS0 volume, CSO volume]monthly totalreport only (gal)all year

How strict are these limits?

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

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