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Cotton Valley, Town of

Sewage treatment plant, Cotton Valley, Louisiana. NPDES permit LA0020401, in force until Sep 30, 2029. Last 12 months: over a limit 54 times (last June 2026), 6 of 12 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: form Q quarterly (6 values), form A quarterly
Last report on file
June 2026
Oct 2024 – Sep 2025
82 values over a limit, 45 required values missing, 12 of 16 reports late

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

All 54 values over a limit
Period endingParameterReportedLimitOver by
October 2025BOD, 5-day, 20 deg. C, monthly average32.3 mg/L≤ 10 mg/L223%
October 2025BOD, 5-day, 20 deg. C, weekly average32.3 mg/L≤ 15 mg/L115%
October 2025Coliform, fecal general, monthly geometric mean> 40000 #/100mL≤ 200 #/100mL—
October 2025Coliform, fecal general, weekly geometric mean> 40000 #/100mL≤ 400 #/100mL—
October 2025Solids, total suspended, monthly average44.2 mg/L≤ 15 mg/L195%
October 2025Solids, total suspended, weekly average44.2 mg/L≤ 23 mg/L92%
November 2025BOD, 5-day, 20 deg. C, monthly average32.7 mg/L≤ 10 mg/L227%
November 2025BOD, 5-day, 20 deg. C, weekly average28.2 mg/L≤ 15 mg/L88%
November 2025Coliform, fecal general, monthly geometric mean> 40000 #/100mL≤ 200 #/100mL—
November 2025Coliform, fecal general, weekly geometric mean> 40000 #/100mL≤ 400 #/100mL—
November 2025Solids, total suspended, monthly average21.3 mg/L≤ 15 mg/L42%
December 2025BOD, 5-day, 20 deg. C, monthly average23 mg/L≤ 10 mg/L130%
December 2025BOD, 5-day, 20 deg. C, weekly average29.3 mg/L≤ 15 mg/L95%
December 2025Coliform, fecal general, monthly geometric mean> 22684 #/100mL≤ 200 #/100mL—
December 2025Coliform, fecal general, weekly geometric mean> 40000 #/100mL≤ 400 #/100mL—
December 2025Solids, total suspended, monthly average30.4 mg/L≤ 15 mg/L103%
December 2025Solids, total suspended, weekly average41.1 mg/L≤ 23 mg/L79%
January 2026BOD, 5-day, 20 deg. C, monthly average22.9 mg/L≤ 10 mg/L129%
January 2026BOD, 5-day, 20 deg. C, weekly average19.8 mg/L≤ 15 mg/L32%
January 2026Coliform, fecal general, monthly geometric mean> 31866 #/100mL≤ 200 #/100mL—
January 2026Coliform, fecal general, weekly geometric mean> 40000 #/100mL≤ 400 #/100mL—
January 2026Solids, total suspended, monthly average28.7 mg/L≤ 15 mg/L91%
January 2026Solids, total suspended, weekly average30.6 mg/L≤ 23 mg/L33%
February 2026BOD, 5-day, 20 deg. C, monthly average42.8 mg/L≤ 10 mg/L328%
February 2026BOD, 5-day, 20 deg. C, weekly average43.5 mg/L≤ 15 mg/L190%
February 2026Coliform, fecal general, monthly geometric mean8632 #/100mL≤ 200 #/100mL4216%
February 2026Coliform, fecal general, weekly geometric mean> 40000 #/100mL≤ 400 #/100mL—
February 2026Solids, total suspended, monthly average41.3 mg/L≤ 15 mg/L175%
February 2026Solids, total suspended, weekly average31.9 mg/L≤ 23 mg/L39%
March 2026BOD, 5-day, 20 deg. C, monthly average36.5 mg/L≤ 10 mg/L265%
March 2026BOD, 5-day, 20 deg. C, weekly average34.7 mg/L≤ 15 mg/L131%
March 2026Coliform, fecal general, monthly geometric mean> 37000 #/100mL≤ 200 #/100mL—
March 2026Coliform, fecal general, weekly geometric mean> 40000 #/100mL≤ 400 #/100mL—
March 2026Solids, total suspended, monthly average43.5 mg/L≤ 15 mg/L190%
March 2026Solids, total suspended, weekly average39.5 mg/L≤ 23 mg/L72%
April 2026BOD, 5-day, 20 deg. C, monthly average35.8 mg/L≤ 10 mg/L258%
April 2026BOD, 5-day, 20 deg. C, weekly average32.5 mg/L≤ 15 mg/L117%
April 2026Coliform, fecal general, monthly geometric mean> 40000 #/100mL≤ 200 #/100mL—
April 2026Coliform, fecal general, weekly geometric mean> 40000 #/100mL≤ 400 #/100mL—
April 2026Solids, total suspended, monthly average36.5 mg/L≤ 15 mg/L143%
April 2026Solids, total suspended, weekly average28.4 mg/L≤ 23 mg/L23%
May 2026BOD, 5-day, 20 deg. C, monthly average206 lb/d≤ 13 lb/d1485%
May 2026BOD, 5-day, 20 deg. C, monthly average28 mg/L≤ 10 mg/L180%
May 2026BOD, 5-day, 20 deg. C, weekly average28 mg/L≤ 15 mg/L87%
May 2026Coliform, fecal general, monthly geometric mean> 40000 #/100mL≤ 200 #/100mL—
May 2026Coliform, fecal general, weekly geometric mean> 40000 #/100mL≤ 400 #/100mL—
May 2026Solids, total suspended, monthly average350 lb/d≤ 19 lb/d1742%
May 2026Solids, total suspended, monthly average47.5 mg/L≤ 15 mg/L217%
May 2026Solids, total suspended, weekly average47.5 mg/L≤ 23 mg/L107%
June 2026BOD, 5-day, 20 deg. C, monthly average21.5 mg/L≤ 10 mg/L115%
June 2026Coliform, fecal general, monthly geometric mean19317 #/100mL≤ 200 #/100mL9559%
June 2026Coliform, fecal general, weekly geometric mean> 40000 #/100mL≤ 400 #/100mL—
June 2026Solids, total suspended, monthly average40.1 mg/L≤ 15 mg/L167%
June 2026Solids, total suspended, weekly average65 mg/L≤ 23 mg/L183%

Limits in force (19)

ParameterStatisticLimitMonths
BOD, 5-day, 20 deg. Cmonthly average≤ 10 mg/Lall year
BOD, 5-day, 20 deg. Cweekly average≤ 15 mg/Lall year
BOD, 5-day, 20 deg. Cmonthly average≤ 13 lb/dall year
pHinstantaneous minimum≥ 6 SUall year
pHinstantaneous maximum≤ 9 SUall year
Solids, total suspendedmonthly average≤ 15 mg/Lall year
Solids, total suspendedweekly average≤ 23 mg/Lall year
Solids, total suspendedmonthly average≤ 19 lb/dall year
Nitrogen, total [as N]monthly averagereport only (mg/L)all year
Nitrogen, total [as N]weekly averagereport only (mg/L)all year
Nitrogen, total [as N]monthly averagereport only (lb/d)all year
Phosphorus, total [as P]monthly averagereport only (mg/L)all year
Phosphorus, total [as P]weekly averagereport only (mg/L)all year
Phosphorus, total [as P]monthly averagereport only (lb/d)all year
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year
Flow, in conduit or thru treatment plantweekly averagereport only (MGD)all year
Chlorine, total residualinstantaneous maximumreport only (mg/L)all year
Coliform, fecal generalmonthly geometric mean≤ 200 #/100mLall year
Coliform, fecal generalweekly geometric mean≤ 400 #/100mLall year

New limits from Oct 1, 2027

ParameterNew limitNew or tighterMedian, last 12 months× new limit
Chlorine, total residual, instantaneous maximum0.033 mg/Lnew0 mg/L (9 values)0×

How strict are these limits?

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

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