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Sewerage District No.1 of Tangipahoa Parish

Sewage treatment plant, major discharger, Ponchatoula, Louisiana. NPDES permit LA0122611, in force until Jan 20, 2027. Last 12 months: over a limit 42 times (last September 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 15 days after each period: form A monthly (16 values), form CE quarterly (9 values), form PI quarterly (9 values), form Q quarterly (17 values)
Renewal application due
Jul 24, 2026 · 180 days before expiry; your permit may set another date
Last report on file
September 2026
Oct 2024 – Sep 2025
35 values over a limit, 70 required values missing, 8 of 24 reports late

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

All 42 values over a limit
Period endingParameterReportedLimitOver by
October 2025BOD, carbonaceous [5 day, 20 C], monthly average10.78 mg/L≤ 10 mg/L8%
October 2025BOD, carbonaceous [5 day, 20 C], weekly average35 mg/L≤ 15 mg/L133%
October 2025Coliform, fecal general, weekly average727 CFU/100mL≤ 400 CFU/100mL82%
October 2025Nitrogen, ammonia total [as N], monthly average2.47 mg/L≤ 2 mg/L24%
October 2025Nitrogen, ammonia total [as N], weekly average5.34 mg/L≤ 4 mg/L34%
October 2025Solids, total suspended, monthly average37 mg/L≤ 15 mg/L147%
October 2025Solids, total suspended, weekly average270 mg/L≤ 23 mg/L1074%
November 2025Nitrogen, ammonia total [as N], monthly average11.23 mg/L≤ 2 mg/L462%
November 2025Nitrogen, ammonia total [as N], weekly average15.3 mg/L≤ 4 mg/L283%
December 2025BOD, carbonaceous [5 day, 20 C], weekly average26 mg/L≤ 15 mg/L73%
December 2025Coliform, fecal general, weekly average488 CFU/100mL≤ 400 CFU/100mL22%
December 2025Nitrogen, ammonia total [as N], monthly average16.8 mg/L≤ 2 mg/L740%
December 2025Nitrogen, ammonia total [as N], weekly average20.7 mg/L≤ 4 mg/L418%
January 2026Nitrogen, ammonia total [as N], monthly average20.2 mg/L≤ 2 mg/L910%
January 2026Nitrogen, ammonia total [as N], monthly average75.72 lb/d≤ 27 lb/d180%
January 2026Nitrogen, ammonia total [as N], weekly average22 mg/L≤ 4 mg/L450%
February 2026Nitrogen, ammonia total [as N], monthly average19.38 mg/L≤ 2 mg/L869%
February 2026Nitrogen, ammonia total [as N], monthly average76.91 lb/d≤ 27 lb/d185%
February 2026Nitrogen, ammonia total [as N], weekly average22 mg/L≤ 4 mg/L450%
March 2026Coliform, fecal general, weekly average1990 CFU/100mL≤ 400 CFU/100mL398%
March 2026Nitrogen, ammonia total [as N], monthly average16.74 mg/L≤ 2 mg/L737%
March 2026Nitrogen, ammonia total [as N], monthly average60.97 lb/d≤ 27 lb/d126%
March 2026Nitrogen, ammonia total [as N], weekly average21.8 mg/L≤ 4 mg/L445%
March 2026Solids, total dissolved, monthly average2642.5 lb/d≤ 2623 lb/d1%
April 2026Nitrogen, ammonia total [as N], monthly average7 mg/L≤ 2 mg/L250%
April 2026Nitrogen, ammonia total [as N], weekly average13.6 mg/L≤ 4 mg/L240%
May 2026Coliform, fecal general, weekly average2419 CFU/100mL≤ 400 CFU/100mL505%
May 2026Nitrogen, ammonia total [as N], monthly average6.8 mg/L≤ 2 mg/L240%
May 2026Nitrogen, ammonia total [as N], weekly average9.5 mg/L≤ 4 mg/L138%
June 2026BOD, carbonaceous [5 day, 20 C], weekly average20 mg/L≤ 15 mg/L33%
June 2026Nitrogen, ammonia total [as N], monthly average2.03 mg/L≤ 2 mg/L2%
June 2026Nitrogen, ammonia total [as N], weekly average4.42 mg/L≤ 4 mg/L11%
July 2026Nitrogen, ammonia total [as N], monthly average2.6 mg/L≤ 2 mg/L30%
August 2026Coliform, fecal general, weekly average866 CFU/100mL≤ 400 CFU/100mL117%
August 2026Nitrogen, ammonia total [as N], monthly average5.95 mg/L≤ 2 mg/L198%
August 2026Nitrogen, ammonia total [as N], weekly average10.4 mg/L≤ 4 mg/L160%
September 2026BOD, carbonaceous [5 day, 20 C], monthly average10.56 mg/L≤ 10 mg/L6%
September 2026BOD, carbonaceous [5 day, 20 C], weekly average45 mg/L≤ 15 mg/L200%
September 2026Nitrogen, ammonia total [as N], monthly average2.88 mg/L≤ 2 mg/L44%
September 2026Nitrogen, ammonia total [as N], weekly average7.81 mg/L≤ 4 mg/L95%
September 2026Solids, total suspended, monthly average17 mg/L≤ 15 mg/L13%
September 2026Solids, total suspended, weekly average37 mg/L≤ 23 mg/L61%

Limits in force (51)

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≤ 15 mg/Lall year
Solids, total suspendedweekly average≤ 23 mg/Lall year
Solids, total suspendedmonthly average≤ 200 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≤ 2 mg/Lall year
Nitrogen, ammonia total [as N]weekly average≤ 4 mg/Lall year
Nitrogen, ammonia total [as N]monthly average≤ 27 lb/dall 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
Chloride [as Cl]monthly averagereport only (mg/L)all year
Chloride [as Cl]weekly averagereport only (mg/L)all year
Chloride [as Cl]monthly averagereport only (lb/d)all year
Copper, total [as Cu]monthly averagereport only (mg/L)all year
Copper, total [as Cu]weekly averagereport only (mg/L)all year
Copper, total [as Cu]monthly average≤ .087 lb/dall year
Copper, total [as Cu]daily maximum≤ .206 lb/dall 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
Solids, total dissolvedmonthly averagereport only (mg/L)all year
Solids, total dissolvedweekly averagereport only (mg/L)all year
Solids, total dissolvedmonthly average≤ 2623 lb/dall year
Solids, total dissolveddaily maximum≤ 6242 lb/dall year
Coliform, fecal generalmonthly average≤ 200 CFU/100mLall year
Coliform, fecal generalweekly average≤ 400 CFU/100mLall year
BOD, carbonaceous [5 day, 20 C]monthly average≤ 10 mg/Lall year
BOD, carbonaceous [5 day, 20 C]weekly average≤ 15 mg/Lall year
BOD, carbonaceous [5 day, 20 C]monthly average≤ 133 lb/dall year
Pass/Fail Static Renewal 7 Day Chronic Ceriodaphnia dubia7-day minimumreport only (pass=0;fail=1)all year
Pass/Fail Static Renewal 7 Day Chronic Ceriodaphnia dubiamonthly average minimumreport only (pass=0;fail=1)all year
Pass/Fail Static Renewal 7Day Chronic Pimephales promelas7-day minimumreport only (pass=0;fail=1)all year
Pass/Fail Static Renewal 7Day Chronic Pimephales promelasmonthly average minimumreport only (pass=0;fail=1)all year
Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Ceriodaphnia dubia7-day minimumreport only (pass=0;fail=1)all year
Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Ceriodaphnia dubiamonthly average minimumreport only (pass=0;fail=1)all year
Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Pimephales promelas7-day minimumreport only (pass=0;fail=1)all year
Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Pimephales promelasmonthly average minimumreport only (pass=0;fail=1)all year
NOEC Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia7-day minimumreport only (%)all year
NOEC Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubiamonthly average minimumreport only (%)all year
NOEC Lethal Static Renewal 7 Day Chronic Pimephales promelas7-day minimumreport only (%)all year
NOEC Lethal Static Renewal 7 Day Chronic Pimephales promelasmonthly average minimumreport only (%)all year
NOEC Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia7-day minimumreport only (%)all year
NOEC Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubiamonthly average minimumreport only (%)all year
NOEC Sub-Lethal Static Renewal 7 Day Chronic Pimephales promelas7-day minimumreport only (%)all year
NOEC Sub-Lethal Static Renewal 7 Day Chronic Pimephales promelasmonthly average minimumreport only (%)all year
Coef Of Var Static Renewal 7Day Chronic Ceriodaphnia dubiamaximumreport only (%)all year
Coef Of Var Static Renewal 7Day Chronic Pimephales promelasmaximumreport only (%)all year

How strict are these limits?

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

Check this month's numbers Email me before each report is due

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/LA0122611 · MCP: https://passage-data.com/mcp