Passage Data · Check a report · Use it from your AI

Natchez, Village of

Sewage treatment plant, Natchez, Louisiana. NPDES permit LA0076686 expired Oct 31, 2026. Last 12 months: over a limit 20 times (last August 2026), 1 of 14 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: form A quarterly (28 values), form Q quarterly (4 values)
Last report on file
August 2026
Oct 2024 – Sep 2025
20 values over a limit, 0 required values missing, 3 of 16 reports late

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

All 20 values over a limit
Period endingParameterReportedLimitOver by
October 2025Chlorine, total residual, instantaneous maximum.21 mg/L≤ .033 mg/L536%
October 2025Coliform, fecal general, monthly geometric mean530 #/100mL≤ 200 #/100mL165%
October 2025Coliform, fecal general, weekly geometric mean530 #/100mL≤ 400 #/100mL33%
November 2025Chlorine, total residual, instantaneous maximum.26 mg/L≤ .033 mg/L688%
November 2025Coliform, fecal general, weekly geometric mean840 #/100mL≤ 400 #/100mL110%
January 2026Chlorine, total residual, instantaneous maximum.04 mg/L≤ .033 mg/L21%
January 2026Coliform, fecal general, monthly geometric mean329 #/100mL≤ 200 #/100mL65%
January 2026Coliform, fecal general, weekly geometric mean600 #/100mL≤ 400 #/100mL50%
January 2026Nitrogen, ammonia total [as N], monthly average22.4 mg/L≤ 15 mg/L49%
January 2026Nitrogen, ammonia total [as N], weekly average31.2 mg/L≤ 30 mg/L4%
March 2026Chlorine, total residual, instantaneous maximum6.5 mg/L≤ .033 mg/L19597%
March 2026Nitrogen, ammonia total [as N], monthly average24.45 mg/L≤ 15 mg/L63%
March 2026Nitrogen, ammonia total [as N], weekly average30.3 mg/L≤ 30 mg/L1%
March 2026Solids, total suspended, monthly average80 mg/L≤ 30 mg/L167%
March 2026Solids, total suspended, weekly average96 mg/L≤ 45 mg/L113%
May 2026Chlorine, total residual, instantaneous maximum.57 mg/L≤ .033 mg/L1627%
June 2026Chlorine, total residual, instantaneous maximum4.85 mg/L≤ .033 mg/L14597%
June 2026Oxygen, dissolved [DO], monthly average minimum4.83 mg/L≥ 5 mg/L3%
August 2026Chlorine, total residual, instantaneous maximum.09 mg/L≤ .033 mg/L173%
August 2026Oxygen, dissolved [DO], monthly average minimum2.7 mg/L≥ 5 mg/L46%

Limits in force (32)

ParameterStatisticLimitMonths
Oxygen, dissolved [DO]monthly average minimum≥ 5 mg/Lall year
Oxygen, dissolved [DO]monthly average minimum≥ 5 mg/Lall year
pHinstantaneous minimum≥ 6 SUall year
pHinstantaneous minimum≥ 6 SUall year
pHinstantaneous maximum≤ 9 SUall year
pHinstantaneous maximum≤ 9 SUall year
Solids, total suspendedmonthly average≤ 30 mg/Lall year
Solids, total suspendedmonthly average≤ 30 mg/Lall year
Solids, total suspendedweekly average≤ 45 mg/Lall year
Solids, total suspendedweekly average≤ 45 mg/Lall year
Nitrogen, total [as N]monthly averagereport only (mg/L)all year
Nitrogen, total [as N]weekly averagereport only (mg/L)all year
Nitrogen, ammonia total [as N]monthly average≤ 15 mg/Lall year
Nitrogen, ammonia total [as N]monthly average≤ 15 mg/Lall year
Nitrogen, ammonia total [as N]weekly average≤ 30 mg/Lall year
Nitrogen, ammonia total [as N]weekly average≤ 30 mg/Lall year
Phosphorus, total [as P]monthly averagereport only (mg/L)all year
Phosphorus, total [as P]weekly averagereport only (mg/L)all year
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)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
Flow, in conduit or thru treatment plantweekly averagereport only (MGD)all year
Chlorine, total residualinstantaneous maximum≤ .033 mg/Lall year
Chlorine, total residualinstantaneous maximum≤ .033 mg/Lall year
Coliform, fecal generalmonthly geometric mean≤ 200 #/100mLall year
Coliform, fecal generalmonthly geometric mean≤ 200 #/100mLall year
Coliform, fecal generalweekly geometric mean≤ 400 #/100mLall year
Coliform, fecal generalweekly geometric mean≤ 400 #/100mLall year
BOD, carbonaceous [5 day, 20 C]monthly average≤ 30 mg/Lall year
BOD, carbonaceous [5 day, 20 C]monthly average≤ 30 mg/Lall year
BOD, carbonaceous [5 day, 20 C]weekly average≤ 45 mg/Lall year
BOD, carbonaceous [5 day, 20 C]weekly average≤ 45 mg/Lall year

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

· Save this facility as a site · Superfund sites nearby · Your permits on one board

On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/LA0076686 · MCP: https://passage-data.com/mcp