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

City of Dequincy

Sewage treatment plant, major discharger, Dequincy, Louisiana. NPDES permit LA0038709 expired Oct 31, 2025; its limits still apply. Last 12 months: over a limit 6 times (last August 2026), 7 of 37 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 15 days after each period: form A monthly (16 values), form CE monthly (11 values), form PI monthly (11 values), form Q quarterly (18 values)
Last report on file
September 2026
Oct 2024 – Sep 2025
3 values over a limit, 0 required values missing, 0 of 40 reports late

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

Period endingParameterReportedLimitOver by
October 2025Whole Effluent Toxicity [WET] - C. dubia, 7-day minimum71 %≥ 94 %24%
October 2025Whole Effluent Toxicity [WET] - C. dubia, monthly average minimum71 %≥ 94 %24%
July 2026Whole Effluent Toxicity [WET] - C. dubia, 7-day minimum30 %≥ 94 %68%
July 2026Whole Effluent Toxicity [WET] - C. dubia, monthly average minimum30 %≥ 94 %68%
August 2026Whole Effluent Toxicity [WET] - C. dubia, 7-day minimum0 %≥ 94 %100%
August 2026Whole Effluent Toxicity [WET] - C. dubia, monthly average minimum0 %≥ 94 %100%

Limits in force (56)

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≤ 138 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≤ 18 lb/dall year
Phosphorus, total [as P]monthly averagereport only (ug/L)all year
Phosphorus, total [as P]weekly averagereport only (ug/L)all year
Phosphorus, total [as P]monthly averagereport only (lb/d)all year
Cadmium, total [as Cd]monthly averagereport only (mg/L)all year
Cadmium, total [as Cd]daily maximumreport only (mg/L)all year
Cadmium, total [as Cd]monthly average≤ .027 lb/dall year
Cadmium, total [as Cd]daily maximum≤ .065 lb/dall year
Copper, total [as Cu]monthly averagereport only (mg/L)all year
Copper, total [as Cu]daily maximumreport only (mg/L)all year
Copper, total [as Cu]monthly average≤ .15 lb/dall year
Copper, total [as Cu]daily maximum≤ .36 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
Whole Effluent Toxicity [WET] - C. dubia7-day minimum≥ 94 %all year
Whole Effluent Toxicity [WET] - C. dubiamonthly average minimum≥ 94 %all year
Whole Effluent Toxicity [WET] - P. promelas7-day minimum≥ 94 %all year
Whole Effluent Toxicity [WET] - P. promelasmonthly average minimum≥ 94 %all year
Mercury, total [as Hg]monthly averagereport only (mg/L)all year
Mercury, total [as Hg]daily maximumreport only (mg/L)all year
Mercury, total [as Hg]monthly average≤ .00027 lb/dall year
Mercury, total [as Hg]daily maximum≤ .00063 lb/dall 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≤ 10 mg/Lall year
BOD, carbonaceous [5 day, 20 C]weekly average≤ 15 mg/Lall year
BOD, carbonaceous [5 day, 20 C]monthly average≤ 92 lb/dall year
Pass/Fail Static Renewal 7 Day Chronic Ceriodaphnia dubiamonthly average minimumreport only (pass=0;fail=1)all year
Pass/Fail Static Renewal 7 Day Chronic Ceriodaphnia dubia7-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
Pass/Fail Static Renewal 7Day Chronic Pimephales promelas7-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 Ceriodaphnia dubia7-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
Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Pimephales promelas7-day minimumreport only (pass=0;fail=1)all year
NOEC Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubiamonthly average minimumreport only (%)all year
NOEC Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia7-day minimumreport only (%)all year
NOEC Lethal Static Renewal 7 Day Chronic Pimephales promelasmonthly average minimumreport only (%)all year
NOEC Lethal Static Renewal 7 Day Chronic Pimephales promelas7-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 Ceriodaphnia dubia7-day minimumreport only (%)all year
NOEC Sub-Lethal Static Renewal 7 Day Chronic Pimephales promelasmonthly average minimumreport only (%)all year
NOEC Sub-Lethal Static Renewal 7 Day Chronic Pimephales promelas7-day 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

· 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/LA0038709 · MCP: https://passage-data.com/mcp