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Golconda, City of

Sewage treatment plant, Golconda, Illinois. NPDES permit IL0077496, in force until Jan 31, 2028. Last 12 months: over a limit 8 times (last August 2026), 26 required values missing, 4 of 22 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 25 days after each period: outfall 001 form 0 monthly (23 values), outfall INF form L monthly (4 values)
Renewal application due
Aug 4, 2027 · 180 days before expiry; your permit may set another date
Last report on file
August 2026
Oct 2024 – Sep 2025
4 values over a limit, 48 required values missing, 6 of 24 reports late

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

Period endingParameterReportedLimitOver by
February 2026Nitrogen, ammonia total [as N], monthly average4.6 mg/L≤ 4 mg/L15%
March 2026Nitrogen, ammonia total [as N], monthly average4.54 mg/L≤ 2.6 mg/L75%
April 2026Nitrogen, ammonia total [as N], monthly average4.85 mg/L≤ 2.6 mg/L87%
May 2026Nitrogen, ammonia total [as N], monthly average4.2 mg/L≤ 2.6 mg/L62%
June 2026Nitrogen, ammonia total [as N], monthly average3.7 mg/L≤ 2.3 mg/L61%
July 2026Nitrogen, ammonia total [as N], monthly average4.4 mg/L≤ 2.3 mg/L91%
July 2026Nitrogen, ammonia total [as N], monthly average4.4 mg/L≤ 2.3 mg/L91%
August 2026Nitrogen, ammonia total [as N], monthly average3.7 mg/L≤ 2.3 mg/L61%

Limits in force (39)

ParameterStatisticLimitMonthsOutfall
Oxygen, dissolved [DO]monthly average minimum≥ 5.5 mg/LJan, Feb, Aug, Sep, Oct, Nov, Dec001
Oxygen, dissolved [DO]minimum weekly average≥ 4 mg/LJan, Feb, Aug, Sep, Oct, Nov, Dec001
Oxygen, dissolved [DO]minimum weekly average≥ 6 mg/LMar–Jul001
Oxygen, dissolved [DO]daily minimum≥ 3.5 mg/LJan, Feb, Aug, Sep, Oct, Nov, Dec001
Oxygen, dissolved [DO]daily minimum≥ 5 mg/LMar–Jul001
pHminimum≥ 6 SUall year001
pHmaximum≤ 9 SUall year001
Solids, total suspendedmonthly average≤ 37 mg/Lall year001
Solids, total suspendedweekly average≤ 45 mg/Lall year001
Solids, total suspendedmonthly average≤ 201 lb/dall year001
Solids, total suspendedweekly average≤ 244 lb/dall year001
Nitrogen, ammonia total [as N]monthly average≤ 2.6 mg/LMar, Apr, May, Sep, Oct001
Nitrogen, ammonia total [as N]monthly average≤ 2.3 mg/LJun–Aug001
Nitrogen, ammonia total [as N]monthly average≤ 4 mg/LJan, Feb, Nov, Dec001
Nitrogen, ammonia total [as N]daily maximum≤ 14.4 mg/LMar, Apr, May, Sep, Oct001
Nitrogen, ammonia total [as N]daily maximum≤ 15 mg/LJun–Aug001
Nitrogen, ammonia total [as N]daily maximum≤ 8.4 mg/LJan, Feb, Nov, Dec001
Nitrogen, ammonia total [as N]monthly average≤ 14 lb/dMar, Apr, May, Sep, Oct001
Nitrogen, ammonia total [as N]monthly average≤ 12 lb/dJun–Aug001
Nitrogen, ammonia total [as N]monthly average≤ 22 lb/dJan, Feb, Nov, Dec001
Nitrogen, ammonia total [as N]daily maximum≤ 78 lb/dMar, Apr, May, Sep, Oct001
Nitrogen, ammonia total [as N]daily maximum≤ 81 lb/dJun–Aug001
Nitrogen, ammonia total [as N]daily maximum≤ 46 lb/dJan, Feb, Nov, Dec001
Nitrogen, ammonia total [as N]weekly average≤ 5.8 mg/LJun–Aug001
Nitrogen, ammonia total [as N]weekly average≤ 6.5 mg/LMar, Apr, May, Sep, Oct001
Nitrogen, ammonia total [as N]weekly average≤ 31 lb/dJun–Aug001
Nitrogen, ammonia total [as N]weekly average≤ 35 lb/dMar, Apr, May, Sep, Oct001
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year001
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year001
Chlorine, total residualdaily maximum≤ .05 mg/Lall year001
Coliform, fecal generaldaily maximumreport only (#/100mL)May–Oct001
BOD, carbonaceous [5 day, 20 C]monthly average≤ 25 mg/Lall year001
BOD, carbonaceous [5 day, 20 C]weekly average≤ 40 mg/Lall year001
BOD, carbonaceous [5 day, 20 C]monthly average≤ 136 lb/dall year001
BOD, carbonaceous [5 day, 20 C]weekly average≤ 217 lb/dall year001
BOD, 5-day, 20 deg. Cmonthly averagereport only (mg/L)all yearINF
Solids, total suspendedmonthly averagereport only (mg/L)all yearINF
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all yearINF
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all yearINF

Cited limits by parameter: Illinois'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/IL0077496 · MCP: https://passage-data.com/mcp