Passage Data · Check a report · Use it from your AI

St. John the Baptist Parish - River Road Treatment Plant

Sewage treatment plant, major discharger, Laplace, Louisiana. NPDES permit LA0069868, in force until Apr 30, 2027. Last 12 months: over a limit 21 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 S twice a year
Renewal application due
Nov 1, 2026 · 180 days before expiry; your permit may set another date
Last report on file
September 2026
Oct 2024 – Sep 2025
25 values over a limit, 0 required values missing, 2 of 20 reports late

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

All 21 values over a limit
Period endingParameterReportedLimitOver by
November 2025Solids, total suspended, weekly average48 mg/L≤ 45 mg/L7%
December 2025BOD, 5-day, 20 deg. C, monthly average1642 lb/d≤ 1126 lb/d46%
December 2025BOD, 5-day, 20 deg. C, monthly average80 mg/L≤ 30 mg/L167%
December 2025BOD, 5-day, 20 deg. C, weekly average192 mg/L≤ 45 mg/L327%
December 2025Solids, total suspended, monthly average50 mg/L≤ 30 mg/L67%
December 2025Solids, total suspended, weekly average82 mg/L≤ 45 mg/L82%
January 2026Solids, total suspended, monthly average34 mg/L≤ 30 mg/L13%
January 2026Solids, total suspended, weekly average56 mg/L≤ 45 mg/L24%
February 2026Solids, total suspended, monthly average35 mg/L≤ 30 mg/L17%
February 2026Solids, total suspended, weekly average62 mg/L≤ 45 mg/L38%
April 2026BOD, 5-day, 20 deg. C, monthly average33 mg/L≤ 30 mg/L10%
April 2026BOD, 5-day, 20 deg. C, weekly average68 mg/L≤ 45 mg/L51%
August 2026BOD, 5-day, 20 deg. C, monthly average1414 lb/d≤ 1126 lb/d26%
August 2026BOD, 5-day, 20 deg. C, monthly average54 mg/L≤ 30 mg/L80%
August 2026BOD, 5-day, 20 deg. C, weekly average109 mg/L≤ 45 mg/L142%
August 2026Solids, total suspended, monthly average1522 lb/d≤ 1126 lb/d35%
August 2026Solids, total suspended, monthly average58 mg/L≤ 30 mg/L93%
August 2026Solids, total suspended, weekly average114 mg/L≤ 45 mg/L153%
September 2026BOD, 5-day, 20 deg. C, monthly average32 mg/L≤ 30 mg/L7%
September 2026BOD, 5-day, 20 deg. C, weekly average60 mg/L≤ 45 mg/L33%
September 2026Coliform, fecal general, weekly geometric mean849 #/100mL≤ 400 #/100mL112%

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≤ 1126 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≤ 1126 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.

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

· Save this facility as a site · Superfund sites nearby · Your permits on one board

On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/LA0069868 · MCP: https://passage-data.com/mcp