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ST John the Baptist Parish

Sewage treatment plant, major discharger, Reserve, Louisiana. NPDES permit LA0127097, in force until Dec 14, 2027. Last 12 months: over a limit 10 times (last September 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 15 days after each period: form A monthly (12 values), form Q quarterly (6 values), form DA yearly, form PI yearly, form Y yearly
Renewal application due
Jun 17, 2027 · 180 days before expiry; your permit may set another date
Last report on file
September 2026
Oct 2024 – Sep 2025
2 values over a limit, 0 required values missing, 1 of 19 reports late

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

Period endingParameterReportedLimitOver by
December 2025Coliform, fecal general, weekly geometric mean431 #/100mL≤ 400 #/100mL8%
July 2026BOD, 5-day, 20 deg. C, weekly average46 mg/L≤ 45 mg/L2%
August 2026BOD, 5-day, 20 deg. C, monthly average69 mg/L≤ 30 mg/L130%
August 2026BOD, 5-day, 20 deg. C, weekly average69 mg/L≤ 45 mg/L53%
August 2026Coliform, fecal general, monthly geometric mean1200 #/100mL≤ 200 #/100mL500%
August 2026Coliform, fecal general, weekly geometric mean1200 #/100mL≤ 400 #/100mL200%
August 2026Solids, total suspended, monthly average46 mg/L≤ 30 mg/L53%
August 2026Solids, total suspended, weekly average46 mg/L≤ 45 mg/L2%
September 2026BOD, 5-day, 20 deg. C, monthly average35 mg/L≤ 30 mg/L17%
September 2026Coliform, fecal general, monthly geometric mean266 #/100mL≤ 200 #/100mL33%

Limits in force (41)

ParameterStatisticLimitMonths
BOD, 5-day, 20 deg. Cmonthly average≤ 30 mg/Lall year
BOD, 5-day, 20 deg. Cweekly average≤ 45 mg/Lall year
BOD, 5-day, 20 deg. Cmonthly average≤ 1251 lb/dall 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 suspendedmonthly average≤ 1251 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
Whole effluent toxicity - retest #148-hour minimumreport only (pass=0;fail=1)all year
Whole effluent toxicity - retest #148-hour minimumreport only (pass=0;fail=1)all year
Whole effluent toxicity - retest #1monthly average minimumreport only (pass=0;fail=1)all year
Whole effluent toxicity - retest #1monthly average minimumreport only (pass=0;fail=1)all year
Whole effluent toxicity - retest #248-hour minimumreport only (pass=0;fail=1)all year
Whole effluent toxicity - retest #248-hour minimumreport only (pass=0;fail=1)all year
Whole effluent toxicity - retest #2monthly average minimumreport only (pass=0;fail=1)all year
Whole effluent toxicity - retest #2monthly average minimumreport only (pass=0;fail=1)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
Priority pollutants scan [yes/no]minimum≥ 1 N=0;Y=1all year
Whole Effluent Toxicity - Retest #348-hour minimumreport only (pass=0;fail=1)all year
Whole Effluent Toxicity - Retest #348-hour minimumreport only (pass=0;fail=1)all year
Whole Effluent Toxicity - Retest #3monthly average minimumreport only (pass=0;fail=1)all year
Whole Effluent Toxicity - Retest #3monthly average minimumreport only (pass=0;fail=1)all year
Coliform, fecal generalmonthly geometric mean≤ 200 #/100mLall year
Coliform, fecal generalweekly geometric mean≤ 400 #/100mLall year
Low Flow Pass/Fail Static Renewal 48Hr Acute Daphnia pulex48-hour minimumreport only (pass=0;fail=1)all year
Low Flow Pass/Fail Static Renewal 48Hr Acute Daphnia pulexmonthly average minimumreport only (pass=0;fail=1)all year
LF Pass/Fail Static Renewal 48Hr Acute Pimephales promelas48-hour minimumreport only (pass=0;fail=1)all year
LF Pass/Fail Static Renewal 48Hr Acute Pimephales promelasmonthly average minimumreport only (pass=0;fail=1)all year
NOAEC Lethal Statis Renewal 48 Hr Acute Daphnia pulex48-hour minimumreport only (%)all year
NOAEC Lethal Statis Renewal 48 Hr Acute Daphnia pulexmonthly average minimumreport only (%)all year
NOAEC Lethal Static Renewal 48Hr acute Pimephales promelas48-hour minimumreport only (%)all year
NOAEC Lethal Static Renewal 48Hr acute Pimephales promelasmonthly average minimumreport only (%)all year
Coef Of Var Static Renewal 48Hr Acute D. pulexmaximumreport only (%)all year
Coef Of Var Static Renewal 48Hr Acute Pimephales promelasmaximumreport only (%)all year

Cited limits by parameter: Louisiana'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/LA0127097 · MCP: https://passage-data.com/mcp