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Grambling City of - Grambling Regional WWTP

Sewage treatment plant, major discharger, Grambling, Louisiana. NPDES permit LA0038822, in force until Sep 30, 2031. Last 12 months: over a limit 41 times (last September 2026), 11 required values missing, 6 of 39 reports late. Source: EPA ECHO, Oct 22, 2026.

Last report on file
September 2026
Oct 2024 – Sep 2025
19 values over a limit, 11 required values missing, 12 of 40 reports late

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

All 41 values over a limit
Period endingParameterReportedLimitOver by
October 2025Whole Effluent Toxicity [WET] - P. promelas, 7-day minimum30 %≥ 96 %69%
October 2025Whole Effluent Toxicity [WET] - P. promelas, monthly average minimum30 %≥ 96 %69%
December 2025Copper, total [as Cu], monthly average.125 lb/d≤ .06 lb/d108%
December 2025Mercury, total [as Hg], monthly average< .0011 lb/d≤ .0004 lb/d175%
December 2025Mercury, total [as Hg], weekly average< .0011 lb/d≤ .0009 lb/d22%
December 2025Whole Effluent Toxicity [WET] - C. dubia, 7-day minimum54 %≥ 96 %44%
December 2025Whole Effluent Toxicity [WET] - C. dubia, monthly average minimum54 %≥ 96 %44%
January 2026Whole Effluent Toxicity [WET] - C. dubia, 7-day minimum0 %≥ 96 %100%
January 2026Whole Effluent Toxicity [WET] - C. dubia, monthly average minimum0 %≥ 96 %100%
February 2026Whole Effluent Toxicity [WET] - C. dubia, 7-day minimum0 %≥ 96 %100%
February 2026Whole Effluent Toxicity [WET] - C. dubia, monthly average minimum0 %≥ 96 %100%
March 2026Whole Effluent Toxicity [WET] - C. dubia, 7-day minimum72 %≥ 96 %25%
March 2026Whole Effluent Toxicity [WET] - C. dubia, monthly average minimum72 %≥ 96 %25%
April 2026Whole Effluent Toxicity [WET] - C. dubia, 7-day minimum30 %≥ 96 %69%
April 2026Whole Effluent Toxicity [WET] - C. dubia, monthly average minimum30 %≥ 96 %69%
May 2026Coliform, fecal general, weekly geometric mean559 #/100mL≤ 400 #/100mL40%
May 2026Nitrogen, ammonia total [as N], monthly average11.1 mg/L≤ 2 mg/L455%
May 2026Nitrogen, ammonia total [as N], monthly average30.4 lb/d≤ 25 lb/d22%
May 2026Nitrogen, ammonia total [as N], weekly average10.3 mg/L≤ 4 mg/L158%
June 2026Coliform, fecal general, weekly geometric mean664 #/100mL≤ 400 #/100mL66%
June 2026Copper, total [as Cu], monthly average.07 lb/d≤ .06 lb/d17%
June 2026Mercury, total [as Hg], monthly average.00128 lb/d≤ .0004 lb/d220%
June 2026Mercury, total [as Hg], weekly average< .00128 lb/d≤ .0009 lb/d42%
June 2026Nitrogen, ammonia total [as N], monthly average32.2 lb/d≤ 25 lb/d29%
June 2026Nitrogen, ammonia total [as N], monthly average7.97 mg/L≤ 2 mg/L299%
June 2026Nitrogen, ammonia total [as N], weekly average7.18 mg/L≤ 4 mg/L80%
July 2026Coliform, fecal general, weekly geometric mean460 #/100mL≤ 400 #/100mL15%
July 2026Nitrogen, ammonia total [as N], monthly average6.35 mg/L≤ 2 mg/L218%
July 2026Nitrogen, ammonia total [as N], weekly average6.19 mg/L≤ 4 mg/L55%
August 2026Nitrogen, ammonia total [as N], monthly average8.35 mg/L≤ 2 mg/L318%
August 2026Nitrogen, ammonia total [as N], weekly average10.7 mg/L≤ 4 mg/L168%
August 2026Whole Effluent Toxicity [WET] - P. promelas, 7-day minimum54 %≥ 96 %44%
August 2026Whole Effluent Toxicity [WET] - P. promelas, monthly average minimum54 %≥ 96 %44%
September 2026Copper, total [as Cu], monthly average.14 lb/d≤ .06 lb/d133%
September 2026Mercury, total [as Hg], monthly average< .001 lb/d≤ .0004 lb/d150%
September 2026Mercury, total [as Hg], weekly average< .001 lb/d≤ .0009 lb/d11%
September 2026Nitrogen, ammonia total [as N], monthly average20.6 mg/L≤ 2 mg/L930%
September 2026Nitrogen, ammonia total [as N], monthly average44.3 lb/d≤ 25 lb/d77%
September 2026Nitrogen, ammonia total [as N], weekly average17.3 mg/L≤ 4 mg/L333%
September 2026Whole Effluent Toxicity [WET] - P. promelas, 7-day minimum54 %≥ 96 %44%
September 2026Whole Effluent Toxicity [WET] - P. promelas, monthly average minimum54 %≥ 96 %44%

Limits in force (66)

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≤ 20 mg/LJan, Feb, Mar, Apr, Nov, Dec
Solids, total suspendedmonthly average≤ 15 mg/LMay–Oct
Solids, total suspendedweekly average≤ 30 mg/LJan, Feb, Mar, Apr, Nov, Dec
Solids, total suspendedweekly average≤ 23 mg/LMay–Oct
Solids, total suspendedmonthly average≤ 250 lb/dJan, Feb, Mar, Apr, Nov, Dec
Solids, total suspendedmonthly average≤ 188 lb/dMay–Oct
Solids, total suspendedmonthly averagereport only (mg/L)all year
Solids, total suspendedweekly averagereport only (mg/L)all 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/LMay–Oct
Nitrogen, ammonia total [as N]monthly average≤ 4 mg/LJan, Feb, Mar, Apr, Nov, Dec
Nitrogen, ammonia total [as N]weekly average≤ 4 mg/LMay–Oct
Nitrogen, ammonia total [as N]weekly average≤ 8 mg/LJan, Feb, Mar, Apr, Nov, Dec
Nitrogen, ammonia total [as N]monthly average≤ 25 lb/dMay–Oct
Nitrogen, ammonia total [as N]monthly average≤ 50 lb/dJan, Feb, Mar, Apr, Nov, Dec
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
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≤ .06 lb/dall year
Copper, total [as Cu]weekly average≤ .2 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
Chlorine, total residualinstantaneous maximum≤ .033 mg/Lall year
Whole Effluent Toxicity [WET] - C. dubia7-day minimum≥ 96 %all year
Whole Effluent Toxicity [WET] - C. dubiamonthly average minimum≥ 96 %all year
Whole Effluent Toxicity [WET] - P. promelas7-day minimum≥ 96 %all year
Whole Effluent Toxicity [WET] - P. promelasmonthly average minimum≥ 96 %all year
Mercury, total [as Hg]monthly average≤ .0004 lb/dall year
Mercury, total [as Hg]weekly average≤ .0009 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/LMay–Oct
BOD, carbonaceous [5 day, 20 C]monthly average≤ 20 mg/LJan, Feb, Mar, Apr, Nov, Dec
BOD, carbonaceous [5 day, 20 C]weekly average≤ 15 mg/LMay–Oct
BOD, carbonaceous [5 day, 20 C]weekly average≤ 30 mg/LJan, Feb, Mar, Apr, Nov, Dec
BOD, carbonaceous [5 day, 20 C]monthly average≤ 125 lb/dMay–Oct
BOD, carbonaceous [5 day, 20 C]monthly average≤ 250 lb/dJan, Feb, Mar, Apr, Nov, Dec
BOD, carbonaceous [5 day, 20 C]monthly averagereport only (mg/L)all year
BOD, carbonaceous [5 day, 20 C]weekly averagereport only (mg/L)all year
BOD, carbonaceous, percent removalmonthly average minimum≥ 85 %all year
Solids, suspended percent removalmonthly average minimum≥ 85 %all 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.

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Your permit document is the final word. As JSON: /api/v1/permits/LA0038822 · MCP: https://passage-data.com/mcp