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Town of Delhi

Sewage treatment plant, major discharger, Delhi, Louisiana. NPDES permit LA0039802, in force until Dec 14, 2027. Last 12 months: over a limit 23 times (last July 2026), 27 of 62 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 15 days after each period: outfall 001 form A monthly (3 values), outfall 001 form CE monthly (11 values), outfall 001 form PI monthly (11 values), outfall 001 form Q quarterly (10 values), outfall 101 form A monthly (12 values), outfall 102 form A monthly (8 values)
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
20 values over a limit, 0 required values missing, 6 of 64 reports late

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

All 23 values over a limit
Period endingOutfallParameterReportedLimitOver by
November 2025101Coliform, fecal general, weekly geometric mean2200 #/100mL≤ 400 #/100mL450%
November 2025101Solids, total suspended, monthly average3736.91 lb/d≤ 88 lb/d4146%
November 2025101Solids, total suspended, monthly average544.53 mg/L≤ 15 mg/L3530%
November 2025101Solids, total suspended, weekly average1444 mg/L≤ 23 mg/L6178%
November 2025102Solids, total suspended, monthly average8342.44 lb/d≤ 754 lb/d1006%
November 2025102Solids, total suspended, weekly average66138 lb/d≤ 930 lb/d7012%
February 2026101Solids, total suspended, monthly average134.08 lb/d≤ 88 lb/d52%
February 2026101Solids, total suspended, monthly average21.12 mg/L≤ 15 mg/L41%
February 2026101Solids, total suspended, weekly average29 mg/L≤ 23 mg/L26%
March 2026101Solids, total suspended, monthly average242.1 lb/d≤ 88 lb/d175%
March 2026101Solids, total suspended, monthly average45.49 mg/L≤ 15 mg/L203%
March 2026101Solids, total suspended, weekly average102 mg/L≤ 23 mg/L343%
April 2026101Solids, total suspended, monthly average159.45 lb/d≤ 88 lb/d81%
April 2026101Solids, total suspended, monthly average18.24 mg/L≤ 15 mg/L22%
April 2026101Solids, total suspended, weekly average37 mg/L≤ 23 mg/L61%
May 2026101Solids, total suspended, monthly average116.38 lb/d≤ 88 lb/d32%
May 2026101Solids, total suspended, weekly average26 mg/L≤ 23 mg/L13%
June 2026101BOD, 5-day, 20 deg. C, monthly average63.01 lb/d≤ 58 lb/d9%
June 2026101Solids, total suspended, monthly average18.62 mg/L≤ 15 mg/L24%
June 2026101Solids, total suspended, monthly average213.13 lb/d≤ 88 lb/d142%
June 2026101Solids, total suspended, weekly average26 mg/L≤ 23 mg/L13%
July 2026001Whole Effluent Toxicity [WET] - C. dubia, 7-day minimum0 %≥ 20 %100%
July 2026001Whole Effluent Toxicity [WET] - C. dubia, monthly average minimum0 %≥ 20 %100%

Limits in force (55)

ParameterStatisticLimitMonthsOutfall
Nitrogen, total [as N]monthly averagereport only (mg/L)all year001
Nitrogen, total [as N]weekly averagereport only (mg/L)all year001
Nitrogen, total [as N]monthly averagereport only (lb/d)all year001
Phosphorus, total [as P]monthly averagereport only (mg/L)all year001
Phosphorus, total [as P]weekly averagereport only (mg/L)all year001
Phosphorus, total [as P]monthly averagereport only (lb/d)all year001
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year001
Flow, in conduit or thru treatment plantweekly averagereport only (MGD)all year001
Chlorine, total residualinstantaneous maximum≤ .033 mg/Lall year001
Whole Effluent Toxicity [WET] - C. dubia7-day minimum≥ 20 %all year001
Whole Effluent Toxicity [WET] - C. dubiamonthly average minimum≥ 20 %all year001
Whole Effluent Toxicity [WET] - P. promelas7-day minimum≥ 20 %all year001
Whole Effluent Toxicity [WET] - P. promelasmonthly average minimum≥ 20 %all year001
Mercury, total [as Hg]monthly averagereport only (mg/L)all year001
Mercury, total [as Hg]daily maximumreport only (mg/L)all year001
Mercury, total [as Hg]monthly average≤ .002 lb/dall year001
Mercury, total [as Hg]daily maximum≤ .005 lb/dall year001
Pass/Fail Static Renewal 7 Day Chronic Ceriodaphnia dubia7-day minimumreport only (pass=0;fail=1)all year001
Pass/Fail Static Renewal 7 Day Chronic Ceriodaphnia dubiamonthly average minimumreport only (pass=0;fail=1)all year001
Pass/Fail Static Renewal 7Day Chronic Pimephales promelas7-day minimumreport only (pass=0;fail=1)all year001
Pass/Fail Static Renewal 7Day Chronic Pimephales promelasmonthly average minimumreport only (pass=0;fail=1)all year001
Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Ceriodaphnia dubia7-day minimumreport only (pass=0;fail=1)all year001
Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Ceriodaphnia dubiamonthly average minimumreport only (pass=0;fail=1)all year001
Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Pimephales promelas7-day minimumreport only (pass=0;fail=1)all year001
Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Pimephales promelasmonthly average minimumreport only (pass=0;fail=1)all year001
NOEC Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia7-day minimumreport only (%)all year001
NOEC Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubiamonthly average minimumreport only (%)all year001
NOEC Lethal Static Renewal 7 Day Chronic Pimephales promelas7-day minimumreport only (%)all year001
NOEC Lethal Static Renewal 7 Day Chronic Pimephales promelasmonthly average minimumreport only (%)all year001
NOEC Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia7-day minimumreport only (%)all year001
NOEC Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubiamonthly average minimumreport only (%)all year001
NOEC Sub-Lethal Static Renewal 7 Day Chronic Pimephales promelas7-day minimumreport only (%)all year001
NOEC Sub-Lethal Static Renewal 7 Day Chronic Pimephales promelasmonthly average minimumreport only (%)all year001
Coef Of Var Static Renewal 7Day Chronic Ceriodaphnia dubiamaximumreport only (%)all year001
Coef Of Var Static Renewal 7Day Chronic Pimephales promelasmaximumreport only (%)all year001
BOD, 5-day, 20 deg. Cmonthly average≤ 10 mg/Lall year101
BOD, 5-day, 20 deg. Cweekly average≤ 15 mg/Lall year101
BOD, 5-day, 20 deg. Cmonthly average≤ 58 lb/dall year101
pHinstantaneous minimum≥ 6 SUall year101
pHinstantaneous maximum≤ 9 SUall year101
Solids, total suspendedmonthly average≤ 15 mg/Lall year101
Solids, total suspendedweekly average≤ 23 mg/Lall year101
Solids, total suspendedmonthly average≤ 88 lb/dall year101
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year101
Flow, in conduit or thru treatment plantweekly averagereport only (MGD)all year101
Coliform, fecal generalmonthly geometric mean≤ 200 #/100mLall year101
Coliform, fecal generalweekly geometric mean≤ 400 #/100mLall year101
BOD, 5-day, 20 deg. Cmonthly average≤ 363 lb/dall year102
BOD, 5-day, 20 deg. Cweekly average≤ 495 lb/dall year102
pHinstantaneous minimum≥ 6 SUall year102
pHinstantaneous maximum≤ 9.5 SUall year102
Solids, total suspendedmonthly average≤ 754 lb/dall year102
Solids, total suspendedweekly average≤ 930 lb/dall year102
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year102
Flow, in conduit or thru treatment plantweekly averagereport only (MGD)all year102

How strict are these limits?

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

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