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Dauphin Island Water, Sewer, and Fire Protection Authority

Sewage treatment plant, Dauphin Island, Alabama. NPDES permit AL0050547, in force until Sep 30, 2029. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: form 1 monthly (43 values), form A yearly
Last report on file
August 2026
Oct 2024 – Sep 2025
0 values over a limit, 0 required values missing, 0 of 13 reports late

Limits in force (45)

ParameterStatisticLimitMonths
Oxygen, dissolved [DO]daily minimum≥ 5 mg/Lall year
pHdaily minimum≥ 6 SUall year
pHdaily maximum≤ 8.5 SUall year
Solids, total suspendedmonthly average≤ 30 mg/Lall year
Solids, total suspendedweekly average≤ 45 mg/Lall year
Solids, total suspendedmonthly average≤ 245 lb/dall year
Solids, total suspendedweekly average≤ 367 lb/dall year
Solids, total suspendedmonthly averagereport only (mg/L)all year
Solids, total suspendedweekly averagereport only (mg/L)all year
Solids, total suspendedmonthly averagereport only (lb/d)all year
Solids, total suspendedweekly averagereport only (lb/d)all year
Nitrogen, ammonia total [as N]monthly average≤ 10 mg/Lall year
Nitrogen, ammonia total [as N]weekly average≤ 15 mg/Lall year
Nitrogen, ammonia total [as N]monthly average≤ 81.7 lb/dall year
Nitrogen, ammonia total [as N]weekly average≤ 122 lb/dall year
Nitrogen, Kjeldahl, total [as N]monthly averagereport only (mg/L)Apr–Oct
Nitrogen, Kjeldahl, total [as N]weekly averagereport only (mg/L)Apr–Oct
Nitrogen, Kjeldahl, total [as N]monthly averagereport only (lb/d)Apr–Oct
Nitrogen, Kjeldahl, total [as N]weekly averagereport only (lb/d)Apr–Oct
Nitrite + Nitrate total [as N]monthly averagereport only (mg/L)Apr–Oct
Nitrite + Nitrate total [as N]weekly averagereport only (mg/L)Apr–Oct
Nitrite + Nitrate total [as N]monthly averagereport only (lb/d)Apr–Oct
Nitrite + Nitrate total [as N]weekly averagereport only (lb/d)Apr–Oct
Phosphorus, total [as P]monthly averagereport only (mg/L)Apr–Oct
Phosphorus, total [as P]weekly averagereport only (mg/L)Apr–Oct
Phosphorus, total [as P]monthly averagereport only (lb/d)Apr–Oct
Phosphorus, total [as P]weekly averagereport only (lb/d)Apr–Oct
Thallium, total recoverablemonthly averagereport only (ug/L)all year
Thallium, total recoverabledaily maximumreport only (ug/L)all year
Enterococci: group D, MF trans, M-E, EIAmonthly average≤ 35 #/100mLall year
Enterococci: group D, MF trans, M-E, EIAdaily maximum≤ 104 #/100mLall year
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year
Chlorine, total residualmonthly average≤ .1 mg/Lall year
Chlorine, total residualdaily maximum≤ .1 mg/Lall year
BOD, carbonaceous [5 day, 20 C]monthly average≤ 15 mg/Lall year
BOD, carbonaceous [5 day, 20 C]weekly average≤ 22.5 mg/Lall year
BOD, carbonaceous [5 day, 20 C]monthly average≤ 122 lb/dall year
BOD, carbonaceous [5 day, 20 C]weekly average≤ 183 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 [5 day, 20 C]monthly averagereport only (lb/d)all year
BOD, carbonaceous [5 day, 20 C]weekly averagereport only (lb/d)all year
BOD, carb-5 day, 20 deg C, percent removalmonthly average minimum≥ 85 %all year
Solids, suspended percent removalmonthly average minimum≥ 85 %all year

How strict are these limits?

Cited limits by parameter: Alabama'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/AL0050547 · MCP: https://passage-data.com/mcp