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Iota Town of - WWTP

Sewage treatment plant, Iota, Louisiana. NPDES permit LA0040142, in force until Sep 30, 2030. Last 12 months: over a limit 16 times (last April 2026), 13 required values missing. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: form A quarterly, form Q quarterly, form Y yearly
Last report on file
June 2026
Oct 2024 – Sep 2025
23 values over a limit, 0 required values missing, 0 of 16 reports late

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

All 16 values over a limit
Period endingParameterReportedLimitOver by
October 2025Solids, total suspended, monthly average23.62 mg/L≤ 15 mg/L57%
October 2025Solids, total suspended, weekly average30 mg/L≤ 23 mg/L30%
November 2025Solids, total suspended, monthly average18.96 mg/L≤ 15 mg/L26%
November 2025Solids, total suspended, weekly average24.6 mg/L≤ 23 mg/L7%
December 2025Coliform, fecal general, monthly geometric mean2410 #/100mL≤ 200 #/100mL1105%
December 2025Coliform, fecal general, weekly geometric mean2410 #/100mL≤ 400 #/100mL503%
December 2025Solids, total suspended, monthly average15.53 mg/L≤ 15 mg/L4%
January 2026Solids, total suspended, monthly average19.7 mg/L≤ 15 mg/L31%
January 2026Solids, total suspended, weekly average29 mg/L≤ 23 mg/L26%
February 2026Coliform, fecal general, weekly geometric mean2410 #/100mL≤ 400 #/100mL503%
February 2026Solids, total suspended, monthly average20.5 mg/L≤ 15 mg/L37%
February 2026Solids, total suspended, weekly average38 mg/L≤ 23 mg/L65%
April 2026BOD, carbonaceous [5 day, 20 C], monthly average11.5 mg/L≤ 10 mg/L15%
April 2026BOD, carbonaceous [5 day, 20 C], weekly average17 mg/L≤ 15 mg/L13%
April 2026Solids, total suspended, monthly average29.4 mg/L≤ 15 mg/L96%
April 2026Solids, total suspended, weekly average36.6 mg/L≤ 23 mg/L59%

Limits in force (36)

ParameterStatisticLimitMonths
Oxygen, dissolved [DO]monthly average minimum≥ 2 mg/LJan, Feb, Dec
Oxygen, dissolved [DO]monthly average minimum≥ 5 mg/LMar–Nov
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≤ 100 lb/dall year
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≤ 10 mg/Lall year
Nitrogen, ammonia total [as N]weekly average≤ 20 mg/Lall year
Nitrogen, ammonia total [as N]monthly average≤ 67 lb/dall 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
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 maximumreport only (mg/L)all year
Solids, total dissolvedmonthly averagereport only (mg/L)all year
Solids, total dissolvedweekly averagereport only (mg/L)all year
Solids, total dissolvedmonthly averagereport only (lb/d)all year
Mercury, total [as Hg]monthly averagereport only (mg/L)all year
Mercury, total [as Hg]weekly averagereport only (mg/L)all year
Mercury, total [as Hg]monthly averagereport only (lb/d)all 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≤ 67 lb/dall year
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

New limits from Oct 1, 2028

ParameterNew limitNew or tighterMedian, last 12 months× new limit
Chlorine, total residual, instantaneous maximum0.033 mg/Lnew1.48 mg/L (5 values)44.8×
Nitrogen, ammonia total [as N], monthly average6.9 lb/dtighter0.81 lb/d (9 values)0.117×
Nitrogen, ammonia total [as N], monthly average1 mg/Ltighter0.64 mg/L (9 values)0.64×
Nitrogen, ammonia total [as N], weekly average2.7 mg/Ltighter0.8 mg/L (9 values)0.296×

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

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/LA0040142 · MCP: https://passage-data.com/mcp