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Sunset Town of - WWTP

Sewage treatment plant, Sunset, Louisiana. NPDES permit LA0038628, in force until Dec 31, 2030. Last 12 months: over a limit 70 times (last June 2026). 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
89 values over a limit, 0 required values missing, 1 of 16 reports late

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

All 70 values over a limit
Period endingParameterReportedLimitOver by
October 2025BOD, carbonaceous [5 day, 20 C], monthly average116.21 lb/d≤ 30 lb/d287%
October 2025BOD, carbonaceous [5 day, 20 C], monthly average17.75 mg/L≤ 10 mg/L78%
October 2025BOD, carbonaceous [5 day, 20 C], weekly average17.75 mg/L≤ 15 mg/L18%
October 2025Coliform, fecal general, monthly geometric mean510 #/100mL≤ 200 #/100mL155%
October 2025Coliform, fecal general, weekly geometric mean650 #/100mL≤ 400 #/100mL63%
October 2025Nitrogen, ammonia total [as N], monthly average59.84 lb/d≤ 15 lb/d299%
October 2025Nitrogen, ammonia total [as N], monthly average9.14 mg/L≤ 5 mg/L83%
October 2025Solids, total suspended, monthly average111.3 lb/d≤ 45 lb/d147%
October 2025Solids, total suspended, monthly average17 mg/L≤ 15 mg/L13%
November 2025BOD, carbonaceous [5 day, 20 C], monthly average16.96 mg/L≤ 10 mg/L70%
November 2025BOD, carbonaceous [5 day, 20 C], monthly average68.68 lb/d≤ 30 lb/d129%
November 2025BOD, carbonaceous [5 day, 20 C], weekly average18.42 mg/L≤ 15 mg/L23%
November 2025Coliform, fecal general, monthly geometric mean271 #/100mL≤ 200 #/100mL36%
November 2025Coliform, fecal general, weekly geometric mean1660 #/100mL≤ 400 #/100mL315%
November 2025Nitrogen, ammonia total [as N], monthly average40.03 lb/d≤ 15 lb/d167%
November 2025Nitrogen, ammonia total [as N], monthly average9.89 mg/L≤ 5 mg/L98%
November 2025Nitrogen, ammonia total [as N], weekly average11.3 mg/L≤ 10 mg/L13%
November 2025Solids, total suspended, monthly average160.55 lb/d≤ 45 lb/d257%
November 2025Solids, total suspended, monthly average39.65 mg/L≤ 15 mg/L164%
November 2025Solids, total suspended, weekly average43 mg/L≤ 23 mg/L87%
December 2025BOD, carbonaceous [5 day, 20 C], monthly average25.94 mg/L≤ 10 mg/L159%
December 2025BOD, carbonaceous [5 day, 20 C], monthly average318.24 lb/d≤ 30 lb/d961%
December 2025BOD, carbonaceous [5 day, 20 C], weekly average25.94 mg/L≤ 15 mg/L73%
December 2025Coliform, fecal general, monthly geometric mean585 #/100mL≤ 200 #/100mL193%
December 2025Coliform, fecal general, weekly geometric mean1600 #/100mL≤ 400 #/100mL300%
December 2025Nitrogen, ammonia total [as N], monthly average15.6 mg/L≤ 5 mg/L212%
December 2025Nitrogen, ammonia total [as N], monthly average191.38 lb/d≤ 15 lb/d1176%
December 2025Nitrogen, ammonia total [as N], weekly average15.6 mg/L≤ 10 mg/L56%
December 2025Solids, total suspended, monthly average46 mg/L≤ 15 mg/L207%
December 2025Solids, total suspended, monthly average564.33 lb/d≤ 45 lb/d1154%
December 2025Solids, total suspended, weekly average46 mg/L≤ 23 mg/L100%
January 2026Coliform, fecal general, monthly geometric mean925 #/100mL≤ 200 #/100mL363%
January 2026Coliform, fecal general, weekly geometric mean2440 #/100mL≤ 400 #/100mL510%
January 2026Solids, total suspended, monthly average65.54 mg/L≤ 20 mg/L228%
January 2026Solids, total suspended, weekly average68 mg/L≤ 30 mg/L127%
February 2026BOD, carbonaceous [5 day, 20 C], monthly average439.87 lb/d≤ 60 lb/d633%
February 2026Coliform, fecal general, monthly geometric mean831 #/100mL≤ 200 #/100mL316%
February 2026Coliform, fecal general, weekly geometric mean960 #/100mL≤ 400 #/100mL140%
February 2026Nitrogen, ammonia total [as N], monthly average10.5 mg/L≤ 10 mg/L5%
February 2026Nitrogen, ammonia total [as N], monthly average263.32 lb/d≤ 30 lb/d778%
February 2026Solids, total suspended, monthly average29 mg/L≤ 20 mg/L45%
February 2026Solids, total suspended, monthly average727.27 lb/d≤ 60 lb/d1112%
March 2026BOD, carbonaceous [5 day, 20 C], monthly average1494.27 lb/d≤ 60 lb/d2390%
March 2026Nitrogen, ammonia total [as N], monthly average854.64 lb/d≤ 30 lb/d2749%
March 2026Solids, total suspended, monthly average51 mg/L≤ 20 mg/L155%
March 2026Solids, total suspended, monthly average5538.35 lb/d≤ 60 lb/d9131%
March 2026Solids, total suspended, weekly average51 mg/L≤ 30 mg/L70%
April 2026BOD, carbonaceous [5 day, 20 C], monthly average24.8 mg/L≤ 20 mg/L24%
April 2026Coliform, fecal general, monthly geometric mean209 #/100mL≤ 200 #/100mL5%
April 2026Coliform, fecal general, weekly geometric mean660 #/100mL≤ 400 #/100mL65%
April 2026Solids, total suspended, monthly average128 mg/L≤ 20 mg/L540%
April 2026Solids, total suspended, weekly average128 mg/L≤ 30 mg/L327%
May 2026BOD, carbonaceous [5 day, 20 C], monthly average742.74 lb/d≤ 30 lb/d2376%
May 2026Coliform, fecal general, monthly geometric mean418 #/100mL≤ 200 #/100mL109%
May 2026Coliform, fecal general, weekly geometric mean560 #/100mL≤ 400 #/100mL40%
May 2026Nitrogen, ammonia total [as N], monthly average180.33 lb/d≤ 15 lb/d1102%
May 2026Oxygen, dissolved [DO], monthly average minimum3.67 mg/L≥ 5 mg/L27%
May 2026Solids, total suspended, monthly average5226.76 lb/d≤ 45 lb/d11515%
May 2026Solids, total suspended, monthly average55.03 mg/L≤ 15 mg/L267%
May 2026Solids, total suspended, weekly average69 mg/L≤ 23 mg/L200%
June 2026BOD, carbonaceous [5 day, 20 C], monthly average10.53 mg/L≤ 10 mg/L5%
June 2026BOD, carbonaceous [5 day, 20 C], monthly average1162.85 lb/d≤ 30 lb/d3776%
June 2026BOD, carbonaceous [5 day, 20 C], weekly average17.31 mg/L≤ 15 mg/L15%
June 2026Coliform, fecal general, monthly geometric mean816 #/100mL≤ 200 #/100mL308%
June 2026Coliform, fecal general, weekly geometric mean1060 #/100mL≤ 400 #/100mL165%
June 2026Nitrogen, ammonia total [as N], monthly average258.34 lb/d≤ 15 lb/d1622%
June 2026Oxygen, dissolved [DO], monthly average minimum4.17 mg/L≥ 5 mg/L17%
June 2026Solids, total suspended, monthly average33.95 mg/L≤ 15 mg/L126%
June 2026Solids, total suspended, monthly average3748.29 lb/d≤ 45 lb/d8230%
June 2026Solids, total suspended, weekly average71 mg/L≤ 23 mg/L209%

Limits in force (38)

ParameterStatisticLimitMonths
Oxygen, dissolved [DO]monthly average minimum≥ 5 mg/Lall year
BOD, 5-day, 20 deg. Cmonthly averagereport only (mg/L)all year
BOD, 5-day, 20 deg. Cweekly averagereport only (mg/L)all year
pHinstantaneous minimum≥ 6 SUall year
pHinstantaneous maximum≤ 9 SUall year
Solids, total suspendedmonthly average≤ 15 mg/LMay–Dec
Solids, total suspendedmonthly average≤ 20 mg/LJan–Apr
Solids, total suspendedweekly average≤ 23 mg/LMay–Dec
Solids, total suspendedweekly average≤ 30 mg/LJan–Apr
Solids, total suspendedmonthly average≤ 45 lb/dMay–Dec
Solids, total suspendedmonthly average≤ 60 lb/dJan–Apr
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/LJan–Apr
Nitrogen, ammonia total [as N]monthly average≤ 5 mg/LMay–Dec
Nitrogen, ammonia total [as N]weekly average≤ 20 mg/LJan–Apr
Nitrogen, ammonia total [as N]weekly average≤ 10 mg/LMay–Dec
Nitrogen, ammonia total [as N]monthly average≤ 30 lb/dJan–Apr
Nitrogen, ammonia total [as N]monthly average≤ 15 lb/dMay–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
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
BOD, percent removal [total]minimum≥ 85 %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≤ 20 mg/LJan–Apr
BOD, carbonaceous [5 day, 20 C]monthly average≤ 10 mg/LMay–Dec
BOD, carbonaceous [5 day, 20 C]weekly average≤ 30 mg/LJan–Apr
BOD, carbonaceous [5 day, 20 C]weekly average≤ 15 mg/LMay–Dec
BOD, carbonaceous [5 day, 20 C]monthly average≤ 60 lb/dJan–Apr
BOD, carbonaceous [5 day, 20 C]monthly average≤ 30 lb/dMay–Dec
Solids, suspended percent removalminimum≥ 85 %all year

New limits from Jan 1, 2029

ParameterNew limitNew or tighterMedian, last 12 months× new limit
Chlorine, total residual, instantaneous maximum0.033 mg/Lnew0.22 mg/L (6 values)6.67×

How strict are these limits?

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

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/LA0038628 · MCP: https://passage-data.com/mcp