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Town of Dry Prong

Sewage treatment plant, Dry Prong, Louisiana. NPDES permit LA0064963, in force until Dec 14, 2027. Last 12 months: over a limit 21 times (last August 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: form A quarterly (28 values), form Q quarterly (4 values)
Renewal application due
Jun 17, 2027 · 180 days before expiry; your permit may set another date
Last report on file
August 2026
Oct 2024 – Sep 2025
20 values over a limit, 0 required values missing, 4 of 16 reports late

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

All 21 values over a limit
Period endingParameterReportedLimitOver by
October 2025Solids, total suspended, monthly average28 mg/L≤ 15 mg/L87%
October 2025Solids, total suspended, weekly average28 mg/L≤ 23 mg/L22%
November 2025Coliform, fecal general, monthly geometric mean450 #/100mL≤ 200 #/100mL125%
November 2025Coliform, fecal general, weekly geometric mean450 #/100mL≤ 400 #/100mL13%
November 2025Oxygen, dissolved [DO], monthly average minimum5 mg/L≥ 6 mg/L17%
December 2025Chlorine, total residual, instantaneous maximum.68 mg/L≤ .037 mg/L1738%
December 2025Oxygen, dissolved [DO], monthly average minimum5.6 mg/L≥ 6 mg/L7%
February 2026Chlorine, total residual, instantaneous maximum.16 mg/L≤ .037 mg/L332%
February 2026Oxygen, dissolved [DO], monthly average minimum4.34 mg/L≥ 6 mg/L28%
March 2026Chlorine, total residual, instantaneous maximum.04 mg/L≤ .037 mg/L8%
March 2026Oxygen, dissolved [DO], monthly average minimum4.55 mg/L≥ 6 mg/L24%
April 2026Chlorine, total residual, instantaneous maximum2.13 mg/L≤ .037 mg/L5657%
May 2026Chlorine, total residual, instantaneous maximum.83 mg/L≤ .037 mg/L2143%
June 2026Chlorine, total residual, instantaneous maximum.71 mg/L≤ .037 mg/L1819%
July 2026Oxygen, dissolved [DO], monthly average minimum4.45 mg/L≥ 6 mg/L26%
July 2026Solids, total suspended, monthly average24 mg/L≤ 15 mg/L60%
July 2026Solids, total suspended, weekly average24 mg/L≤ 23 mg/L4%
August 2026BOD, carbonaceous [5 day, 20 C], monthly average10.75 mg/L≤ 10 mg/L8%
August 2026Oxygen, dissolved [DO], monthly average minimum5.4 mg/L≥ 6 mg/L10%
August 2026Solids, total suspended, monthly average27 mg/L≤ 15 mg/L80%
August 2026Solids, total suspended, weekly average27 mg/L≤ 23 mg/L17%

Limits in force (36)

ParameterStatisticLimitMonths
Oxygen, dissolved [DO]monthly average minimum≥ 6 mg/Lall year
Oxygen, dissolved [DO]monthly average minimum≥ 6 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≤ 15 mg/Lall year
Solids, total suspendedmonthly average≤ 15 mg/Lall year
Solids, total suspendedweekly average≤ 23 mg/Lall year
Solids, total suspendedweekly average≤ 23 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≤ 5 mg/LApr–Oct
Nitrogen, ammonia total [as N]monthly average≤ 5 mg/LApr–Oct
Nitrogen, ammonia total [as N]weekly average≤ 10 mg/LApr–Oct
Nitrogen, ammonia total [as N]weekly average≤ 10 mg/LApr–Oct
Nitrogen, ammonia total [as N]monthly average≤ 10 mg/LJan, Feb, Mar, Nov, Dec
Nitrogen, ammonia total [as N]monthly average≤ 10 mg/LJan, Feb, Mar, Nov, Dec
Nitrogen, ammonia total [as N]weekly average≤ 20 mg/LJan, Feb, Mar, Nov, Dec
Nitrogen, ammonia total [as N]weekly average≤ 20 mg/LJan, Feb, Mar, Nov, Dec
Phosphorus, total [as P]monthly averagereport only (mg/L)all year
Phosphorus, total [as P]weekly averagereport only (mg/L)all year
Chlorine, total residualinstantaneous maximum≤ .037 mg/Lall year
Chlorine, total residualinstantaneous maximum≤ .037 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
Flowmonthly averagereport only (gal/d)all year
Flowmonthly averagereport only (gal/d)all year
Flowweekly averagereport only (gal/d)all year
Flowweekly averagereport only (gal/d)all year
BOD, carbonaceous [5 day, 20 C]monthly average≤ 10 mg/Lall 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]weekly average≤ 15 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

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/LA0064963 · MCP: https://passage-data.com/mcp