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Caddo Parish Sewerage District #7

Sewage treatment plant, Shreveport, Louisiana. NPDES permit LA0097276, in force until Apr 14, 2028. Last 12 months: over a limit 37 times (last August 2026), 1 of 14 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: form A quarterly (17 values), form Q quarterly (6 values)
Renewal application due
Oct 17, 2027 · 180 days before expiry; your permit may set another date
Last report on file
August 2026
Oct 2024 – Sep 2025
29 values over a limit, 0 required values missing, 8 of 16 reports late

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

All 37 values over a limit
Period endingParameterReportedLimitOver by
October 2025Coliform, fecal general, weekly geometric mean672 #/100mL≤ 400 #/100mL68%
October 2025Nitrogen, ammonia total [as N], monthly average59.1 mg/L≤ 15 mg/L294%
October 2025Nitrogen, ammonia total [as N], weekly average62.2 mg/L≤ 30 mg/L107%
November 2025Nitrogen, ammonia total [as N], monthly average54.8 mg/L≤ 15 mg/L265%
November 2025Nitrogen, ammonia total [as N], monthly average94.8 lb/d≤ 88 lb/d8%
November 2025Nitrogen, ammonia total [as N], weekly average54.2 mg/L≤ 30 mg/L81%
December 2025Coliform, fecal general, weekly geometric mean484 #/100mL≤ 400 #/100mL21%
December 2025Nitrogen, ammonia total [as N], monthly average40.5 mg/L≤ 15 mg/L170%
December 2025Nitrogen, ammonia total [as N], weekly average42.1 mg/L≤ 30 mg/L40%
January 2026Coliform, fecal general, monthly geometric mean672 #/100mL≤ 200 #/100mL236%
January 2026Coliform, fecal general, weekly geometric mean1084 #/100mL≤ 400 #/100mL171%
February 2026Coliform, fecal general, weekly geometric mean620 #/100mL≤ 400 #/100mL55%
February 2026Nitrogen, ammonia total [as N], monthly average49.6 mg/L≤ 15 mg/L231%
February 2026Nitrogen, ammonia total [as N], weekly average50.2 mg/L≤ 30 mg/L67%
March 2026Coliform, fecal general, monthly geometric mean965 #/100mL≤ 200 #/100mL383%
March 2026Coliform, fecal general, weekly geometric mean> 1600 #/100mL≤ 400 #/100mL—
March 2026Solids, total suspended, monthly average39 mg/L≤ 30 mg/L30%
April 2026Chlorine, total residual, instantaneous maximum.46 mg/L≤ .033 mg/L1294%
April 2026Coliform, fecal general, weekly geometric mean456 #/100mL≤ 400 #/100mL14%
April 2026Nitrogen, ammonia total [as N], monthly average46.3 mg/L≤ 15 mg/L209%
April 2026Nitrogen, ammonia total [as N], weekly average49.6 mg/L≤ 30 mg/L65%
May 2026Chlorine, total residual, instantaneous maximum.25 mg/L≤ .033 mg/L658%
May 2026Coliform, fecal general, monthly geometric mean208 #/100mL≤ 200 #/100mL4%
May 2026Coliform, fecal general, weekly geometric mean760 #/100mL≤ 400 #/100mL90%
May 2026Nitrogen, ammonia total [as N], monthly average134 lb/d≤ 88 lb/d52%
May 2026Nitrogen, ammonia total [as N], monthly average44.4 mg/L≤ 15 mg/L196%
May 2026Nitrogen, ammonia total [as N], weekly average41.7 mg/L≤ 30 mg/L39%
June 2026Chlorine, total residual, instantaneous maximum.4 mg/L≤ .033 mg/L1112%
June 2026Coliform, fecal general, monthly geometric mean358 #/100mL≤ 200 #/100mL79%
June 2026Coliform, fecal general, weekly geometric mean> 1600 #/100mL≤ 400 #/100mL—
June 2026Nitrogen, ammonia total [as N], monthly average24.6 mg/L≤ 15 mg/L64%
July 2026Chlorine, total residual, instantaneous maximum.5 mg/L≤ .033 mg/L1415%
July 2026Coliform, fecal general, monthly geometric mean866 #/100mL≤ 200 #/100mL333%
July 2026Coliform, fecal general, weekly geometric mean2440 #/100mL≤ 400 #/100mL510%
August 2026Chlorine, total residual, instantaneous maximum.6 mg/L≤ .033 mg/L1718%
August 2026Coliform, fecal general, weekly geometric mean> 1600 #/100mL≤ 400 #/100mL—
August 2026Nitrogen, ammonia total [as N], monthly average15.8 mg/L≤ 15 mg/L5%

Limits in force (23)

ParameterStatisticLimitMonths
Oxygen, dissolved [DO]monthly average minimum≥ 5 mg/Lall year
pHinstantaneous minimum≥ 6 SUall year
pHinstantaneous maximum≤ 9 SUall year
Solids, total suspendedmonthly average≤ 30 mg/Lall year
Solids, total suspendedweekly average≤ 45 mg/Lall year
Solids, total suspendeddaily maximum≤ 175 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
Nitrogen, ammonia total [as N]monthly average≤ 15 mg/Lall year
Nitrogen, ammonia total [as N]weekly average≤ 30 mg/Lall year
Nitrogen, ammonia total [as N]monthly average≤ 88 lb/dall year
Phosphorus, total [as P]monthly averagereport only (mg/L)all year
Phosphorus, total [as P]daily maximumreport 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 plantdaily maximumreport only (MGD)all year
Chlorine, total residualinstantaneous maximum≤ .033 mg/Lall year
Coliform, fecal generalmonthly geometric mean≤ 200 #/100mLall year
Coliform, fecal generalweekly geometric mean≤ 400 #/100mLall year
BOD, carbonaceous [5 day, 20 C]monthly average≤ 30 mg/Lall year
BOD, carbonaceous [5 day, 20 C]weekly average≤ 45 mg/Lall year
BOD, carbonaceous [5 day, 20 C]daily maximum≤ 175 lb/dall year

New limits from Apr 15, 2028

ParameterNew limitNew or tighterMedian, last 12 months× new limit
Nitrogen, ammonia total [as N], monthly average1 mg/Ltighter40.5 mg/L (11 values)40.5×
Nitrogen, ammonia total [as N], monthly average6 lb/dtighter52.3 lb/d (11 values)8.72×
Nitrogen, ammonia total [as N], weekly average2.5 mg/Ltighter41.7 mg/L (11 values)16.7×

How strict are these limits?

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

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