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Town of Waterproof

Sewage treatment plant, Waterproof, Louisiana. NPDES permit LA0033031 expired Mar 31, 2026; its limits still apply. Last 12 months: over a limit 63 times (last June 2026), 1 of 12 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: form Q quarterly (6 values), form A quarterly
Last report on file
June 2026
Oct 2024 – Sep 2025
25 values over a limit, 16 required values missing, 7 of 16 reports late

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

All 63 values over a limit
Period endingParameterReportedLimitOver by
October 2025BOD, carbonaceous [5 day, 20 C], monthly average50.81 mg/L≤ 10 mg/L408%
October 2025BOD, carbonaceous [5 day, 20 C], weekly average51.36 mg/L≤ 15 mg/L242%
October 2025Coliform, fecal general, monthly geometric mean975 #/100mL≤ 200 #/100mL388%
October 2025Coliform, fecal general, weekly geometric mean1440 #/100mL≤ 400 #/100mL260%
October 2025Nitrogen, ammonia total [as N], monthly average36.96 mg/L≤ 5 mg/L639%
October 2025Nitrogen, ammonia total [as N], weekly average37.8 mg/L≤ 10 mg/L278%
October 2025Solids, total suspended, monthly average22.58 mg/L≤ 15 mg/L51%
November 2025BOD, carbonaceous [5 day, 20 C], monthly average20.1 mg/L≤ 10 mg/L101%
November 2025BOD, carbonaceous [5 day, 20 C], weekly average22.26 mg/L≤ 15 mg/L48%
November 2025Chlorine, total residual, instantaneous maximum.09 mg/L≤ .033 mg/L173%
November 2025Coliform, fecal general, monthly geometric mean1887 #/100mL≤ 200 #/100mL844%
November 2025Coliform, fecal general, weekly geometric mean2440 #/100mL≤ 400 #/100mL510%
November 2025Nitrogen, ammonia total [as N], monthly average30.65 mg/L≤ 5 mg/L513%
November 2025Nitrogen, ammonia total [as N], weekly average34.2 mg/L≤ 10 mg/L242%
November 2025Solids, total suspended, monthly average18.46 mg/L≤ 15 mg/L23%
December 2025BOD, carbonaceous [5 day, 20 C], monthly average19.03 mg/L≤ 10 mg/L90%
December 2025BOD, carbonaceous [5 day, 20 C], weekly average19.98 mg/L≤ 15 mg/L33%
December 2025Coliform, fecal general, monthly geometric mean1411 #/100mL≤ 200 #/100mL606%
December 2025Coliform, fecal general, weekly geometric mean1660 #/100mL≤ 400 #/100mL315%
December 2025Nitrogen, ammonia total [as N], monthly average12.9 mg/L≤ 5 mg/L158%
December 2025Nitrogen, ammonia total [as N], weekly average14.1 mg/L≤ 10 mg/L41%
January 2026BOD, carbonaceous [5 day, 20 C], monthly average22.02 mg/L≤ 10 mg/L120%
January 2026BOD, carbonaceous [5 day, 20 C], weekly average32.13 mg/L≤ 15 mg/L114%
January 2026Chlorine, total residual, instantaneous maximum.1 mg/L≤ .033 mg/L203%
January 2026Coliform, fecal general, monthly geometric mean1630 #/100mL≤ 200 #/100mL715%
January 2026Coliform, fecal general, weekly geometric mean1660 #/100mL≤ 400 #/100mL315%
January 2026Nitrogen, ammonia total [as N], monthly average9.35 mg/L≤ 5 mg/L87%
January 2026Nitrogen, ammonia total [as N], weekly average15.4 mg/L≤ 10 mg/L54%
January 2026Solids, total suspended, monthly average24.82 mg/L≤ 15 mg/L65%
January 2026Solids, total suspended, weekly average37 mg/L≤ 23 mg/L61%
February 2026BOD, carbonaceous [5 day, 20 C], monthly average38.01 mg/L≤ 10 mg/L280%
February 2026BOD, carbonaceous [5 day, 20 C], weekly average45.93 mg/L≤ 15 mg/L206%
February 2026Chlorine, total residual, instantaneous maximum.12 mg/L≤ .033 mg/L264%
February 2026Coliform, fecal general, monthly geometric mean515 #/100mL≤ 200 #/100mL158%
February 2026Coliform, fecal general, weekly geometric mean1660 #/100mL≤ 400 #/100mL315%
February 2026Nitrogen, ammonia total [as N], monthly average13.15 mg/L≤ 5 mg/L163%
February 2026Nitrogen, ammonia total [as N], weekly average15.4 mg/L≤ 10 mg/L54%
February 2026Solids, total suspended, monthly average18.5 mg/L≤ 15 mg/L23%
March 2026BOD, carbonaceous [5 day, 20 C], monthly average60.88 mg/L≤ 10 mg/L509%
March 2026BOD, carbonaceous [5 day, 20 C], weekly average60.88 mg/L≤ 15 mg/L306%
March 2026Chlorine, total residual, instantaneous maximum.24 mg/L≤ .033 mg/L627%
March 2026Coliform, fecal general, monthly geometric mean1890 #/100mL≤ 200 #/100mL845%
March 2026Coliform, fecal general, weekly geometric mean1890 #/100mL≤ 400 #/100mL373%
March 2026Nitrogen, ammonia total [as N], monthly average19.3 mg/L≤ 5 mg/L286%
March 2026Nitrogen, ammonia total [as N], weekly average19.3 mg/L≤ 10 mg/L93%
March 2026Solids, total suspended, monthly average21 mg/L≤ 15 mg/L40%
April 2026BOD, carbonaceous [5 day, 20 C], monthly average47.25 mg/L≤ 10 mg/L373%
April 2026BOD, carbonaceous [5 day, 20 C], weekly average47.25 mg/L≤ 15 mg/L215%
April 2026Coliform, fecal general, monthly geometric mean960 #/100mL≤ 200 #/100mL380%
April 2026Coliform, fecal general, weekly geometric mean960 #/100mL≤ 400 #/100mL140%
April 2026Nitrogen, ammonia total [as N], monthly average36.9 mg/L≤ 5 mg/L638%
April 2026Nitrogen, ammonia total [as N], monthly average7.02 lb/d≤ 6 lb/d17%
April 2026Nitrogen, ammonia total [as N], weekly average36.9 mg/L≤ 10 mg/L269%
April 2026Solids, total suspended, monthly average36 mg/L≤ 15 mg/L140%
April 2026Solids, total suspended, weekly average36 mg/L≤ 23 mg/L57%
June 2026BOD, carbonaceous [5 day, 20 C], monthly average44.16 mg/L≤ 10 mg/L342%
June 2026BOD, carbonaceous [5 day, 20 C], weekly average44.16 mg/L≤ 15 mg/L194%
June 2026Coliform, fecal general, monthly geometric mean960 #/100mL≤ 200 #/100mL380%
June 2026Coliform, fecal general, weekly geometric mean960 #/100mL≤ 400 #/100mL140%
June 2026Nitrogen, ammonia total [as N], monthly average16.1 mg/L≤ 5 mg/L222%
June 2026Nitrogen, ammonia total [as N], weekly average16.1 mg/L≤ 10 mg/L61%
June 2026Solids, total suspended, monthly average53 mg/L≤ 15 mg/L253%
June 2026Solids, total suspended, weekly average53 mg/L≤ 23 mg/L130%

Limits in force (22)

ParameterStatisticLimitMonths
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≤ 19 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≤ 5 mg/Lall year
Nitrogen, ammonia total [as N]weekly average≤ 10 mg/Lall year
Nitrogen, ammonia total [as N]monthly average≤ 6 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 maximum≤ .033 mg/Lall 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≤ 13 lb/dall year

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/LA0033031 · MCP: https://passage-data.com/mcp