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City of Fredericksburg

Sewage treatment plant, Fredericksburg, Iowa. NPDES permit IA0028991 expired Jan 26, 2008; its limits still apply. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 15 days after each period: form A monthly (25 values)
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 (77)

ParameterStatisticLimitMonthsOutfall
pHdaily minimum≥ 6 SUall year001
pHdaily maximum≤ 9 SUall year001
pH30-day averagereport only (SU)all year001
pHdaily maximumreport only (SU)all year001
Solids, total suspended30-day average≤ 80 mg/Lall year001
Solids, total suspended7-day average≤ 120 mg/Lall year001
Solids, total suspended30-day average≤ 1134 lb/dall year001
Solids, total suspended7-day average≤ 1701 lb/dall year001
Solids, total suspended30-day averagereport only (mg/L)all year001
Solids, total suspendeddaily maximumreport only (mg/L)all year001
Solids, total suspended30-day averagereport only (lb/d)all year001
Solids, total suspendeddaily maximumreport only (lb/d)all year001
Nitrogen, ammonia total [as N]30-day average≤ 6.6 mg/LApr001
Nitrogen, ammonia total [as N]30-day average≤ 5.1 mg/LMay001
Nitrogen, ammonia total [as N]30-day average≤ 4.2 mg/LJul001
Nitrogen, ammonia total [as N]30-day average≤ 12.6 mg/LFeb001
Nitrogen, ammonia total [as N]30-day average≤ 18.5 mg/LJan001
Nitrogen, ammonia total [as N]30-day average≤ 5 mg/LOct001
Nitrogen, ammonia total [as N]30-day average≤ 4.3 mg/LSep001
Nitrogen, ammonia total [as N]30-day average≤ 6.8 mg/LMar001
Nitrogen, ammonia total [as N]30-day average≤ 3.8 mg/LAug001
Nitrogen, ammonia total [as N]30-day average≤ 6.2 mg/LDec001
Nitrogen, ammonia total [as N]30-day average≤ 4.6 mg/LNov001
Nitrogen, ammonia total [as N]30-day average≤ 3.8 mg/LJun001
Nitrogen, ammonia total [as N]daily maximum≤ 6.6 mg/LApr001
Nitrogen, ammonia total [as N]daily maximum≤ 5.1 mg/LMay001
Nitrogen, ammonia total [as N]daily maximum≤ 5.2 mg/LJul001
Nitrogen, ammonia total [as N]daily maximum≤ 12.6 mg/LFeb001
Nitrogen, ammonia total [as N]daily maximum≤ 23.5 mg/LJan001
Nitrogen, ammonia total [as N]daily maximum≤ 5 mg/LOct001
Nitrogen, ammonia total [as N]daily maximum≤ 5 mg/LSep001
Nitrogen, ammonia total [as N]daily maximum≤ 6.8 mg/LMar001
Nitrogen, ammonia total [as N]daily maximum≤ 4.3 mg/LAug001
Nitrogen, ammonia total [as N]daily maximum≤ 6.2 mg/LDec001
Nitrogen, ammonia total [as N]daily maximum≤ 4.6 mg/LNov001
Nitrogen, ammonia total [as N]daily maximum≤ 5.1 mg/LJun001
Nitrogen, ammonia total [as N]30-day average≤ 93 lb/dApr001
Nitrogen, ammonia total [as N]30-day average≤ 72 lb/dMay001
Nitrogen, ammonia total [as N]30-day average≤ 59 lb/dJul001
Nitrogen, ammonia total [as N]30-day average≤ 178 lb/dFeb001
Nitrogen, ammonia total [as N]30-day average≤ 262 lb/dJan001
Nitrogen, ammonia total [as N]30-day average≤ 72 lb/dOct001
Nitrogen, ammonia total [as N]30-day average≤ 61 lb/dSep001
Nitrogen, ammonia total [as N]30-day average≤ 96 lb/dMar001
Nitrogen, ammonia total [as N]30-day average≤ 54 lb/dAug001
Nitrogen, ammonia total [as N]30-day average≤ 88 lb/dDec001
Nitrogen, ammonia total [as N]30-day average≤ 65 lb/dNov001
Nitrogen, ammonia total [as N]30-day average≤ 53 lb/dJun001
Nitrogen, ammonia total [as N]daily maximum≤ 93 lb/dApr001
Nitrogen, ammonia total [as N]daily maximum≤ 72 lb/dMay001
Nitrogen, ammonia total [as N]daily maximum≤ 74 lb/dJul001
Nitrogen, ammonia total [as N]daily maximum≤ 178 lb/dFeb001
Nitrogen, ammonia total [as N]daily maximum≤ 333 lb/dJan001
Nitrogen, ammonia total [as N]daily maximum≤ 72 lb/dOct001
Nitrogen, ammonia total [as N]daily maximum≤ 72 lb/dSep001
Nitrogen, ammonia total [as N]daily maximum≤ 96 lb/dMar001
Nitrogen, ammonia total [as N]daily maximum≤ 61 lb/dAug001
Nitrogen, ammonia total [as N]daily maximum≤ 88 lb/dDec001
Nitrogen, ammonia total [as N]daily maximum≤ 65 lb/dNov001
Nitrogen, ammonia total [as N]daily maximum≤ 72 lb/dJun001
Flow, in conduit or thru treatment plantdaily maximum≤ 1.7 MGDall year001
BOD, carbonaceous [5 day, 20 C]30-day average≤ 25 mg/Lall year001
BOD, carbonaceous [5 day, 20 C]7-day average≤ 40 mg/Lall year001
BOD, carbonaceous [5 day, 20 C]30-day average≤ 354 lb/dall year001
BOD, carbonaceous [5 day, 20 C]7-day average≤ 567 lb/dall year001
BOD, carbonaceous [5 day, 20 C]30-day averagereport only (mg/L)all year001
BOD, carbonaceous [5 day, 20 C]daily maximumreport only (mg/L)all year001
BOD, carbonaceous [5 day, 20 C]30-day averagereport only (lb/d)all year001
BOD, carbonaceous [5 day, 20 C]daily maximumreport only (lb/d)all year001
Nitrogen, total [as N]30-day averagereport only (mg/L)all year002
Nitrogen, total [as N]daily maximumreport only (mg/L)all year002
Nitrogen, total [as N]30-day averagereport only (lb/d)all year002
Nitrogen, total [as N]daily maximumreport only (lb/d)all year002
Phosphorus, total [as P]30-day averagereport only (mg/L)all year002
Phosphorus, total [as P]daily maximumreport only (mg/L)all year002
Phosphorus, total [as P]30-day averagereport only (lb/d)all year002
Phosphorus, total [as P]daily maximumreport only (lb/d)all year002

How strict are these limits?

Cited limits by parameter: Iowa'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/IA0028991 · MCP: https://passage-data.com/mcp