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City of Mountain Brook

Sewage treatment plant, Mountain Brook, Alabama. NPDES permit AL0050971, in force until Feb 28, 2027. Last 12 months: over a limit 7 times (last August 2026), 1 of 11 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: form 1 monthly (43 values)
Renewal application due
Sep 1, 2026 · 180 days before expiry; your permit may set another date
Last report on file
August 2026
Oct 2024 – Sep 2025
14 values over a limit, 0 required values missing, 0 of 12 reports late

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

Period endingParameterReportedLimitOver by
November 2025BOD, carbonaceous [5 day, 20 C], weekly average9.18≤ 6 mg/L53%
May 2026Phosphorus, total [as P], monthly average.42≤ .3 mg/L40%
July 2026BOD, carb-5 day, 20 deg C, percent removal, monthly average minimum80.5≥ 85 %30%
July 2026BOD, carbonaceous [5 day, 20 C], monthly average5.17≤ 4 mg/L29%
July 2026BOD, carbonaceous [5 day, 20 C], weekly average6.61≤ 6 mg/L10%
July 2026Oxygen, dissolved [DO], daily minimum5.1≥ 6 mg/L15%
August 2026BOD, carbonaceous [5 day, 20 C], monthly average4.39≤ 4 mg/L10%

Limits in force (47)

ParameterStatisticLimitMonths
Oxygen, dissolved [DO]daily minimum≥ 6 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≤ 12.5 lb/dall year
Solids, total suspendedweekly average≤ 18.7 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≤ 1 mg/Lall year
Nitrogen, ammonia total [as N]weekly average≤ 1.5 mg/Lall year
Nitrogen, ammonia total [as N]monthly average≤ .41 lb/dall year
Nitrogen, ammonia total [as N]weekly average≤ .62 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 average≤ .3 mg/LApr–Oct
Phosphorus, total [as P]monthly averagereport only (mg/L)Jan, Feb, Mar, Nov, Dec
Phosphorus, total [as P]weekly averagereport only (mg/L)Apr–Oct
Phosphorus, total [as P]weekly averagereport only (mg/L)Jan, Feb, Mar, Nov, Dec
Phosphorus, total [as P]monthly averagereport only (lb/d)Apr–Oct
Phosphorus, total [as P]monthly averagereport only (lb/d)Jan, Feb, Mar, Nov, Dec
Phosphorus, total [as P]weekly averagereport only (lb/d)Apr–Oct
Phosphorus, total [as P]weekly averagereport only (lb/d)Jan, Feb, Mar, Nov, Dec
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≤ .011 mg/Lall year
Chlorine, total residualdaily maximum≤ .019 mg/Lall year
E. colimonthly average≤ 126 #/100mLall year
E. colidaily maximum≤ 235 #/100mLall year
BOD, carbonaceous [5 day, 20 C]monthly average≤ 4 mg/Lall year
BOD, carbonaceous [5 day, 20 C]weekly average≤ 6 mg/Lall year
BOD, carbonaceous [5 day, 20 C]monthly average≤ 1.6 lb/dall year
BOD, carbonaceous [5 day, 20 C]weekly average≤ 2.5 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.

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/AL0050971 · MCP: https://passage-data.com/mcp