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Shirley WWTP

Sewage treatment plant, Wilkinson, Indiana. NPDES permit IN0024503, in force until Sep 30, 2028. Last 12 months: over a limit 2 times (last November 2025), 1 of 11 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 27 days after each period: form A monthly (20 values)
Renewal application due
Apr 3, 2028 · 180 days before expiry; your permit may set another date
Last report on file
August 2026
Oct 2024 – Sep 2025
0 values over a limit, 4 required values missing, 4 of 12 reports late

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

Period endingParameterReportedLimitOver by
November 2025Solids, total suspended, monthly average19.8 mg/L≤ 18 mg/L10%
November 2025pH, daily maximum9.6 SU≤ 9 SU—

Limits in force (40)

ParameterStatisticLimitMonths
Oxygen, dissolved [DO]daily average minimum≥ 6 mg/LMay–Nov
Oxygen, dissolved [DO]daily average minimum≥ 5 mg/LJan, Feb, Mar, Apr, Dec
pHdaily minimum≥ 6 SUall year
pHdaily minimum≥ 6 SUall year
pHdaily maximum≤ 9 SUall year
pHdaily maximum≤ 9 SUall year
Solids, total suspendedmonthly average≤ 18 mg/LMay–Nov
Solids, total suspendedmonthly average≤ 30 mg/LJan, Feb, Mar, Apr, Dec
Solids, total suspendedmaximum weekly average≤ 27 mg/LMay–Nov
Solids, total suspendedmaximum weekly average≤ 45 mg/LJan, Feb, Mar, Apr, Dec
Solids, total suspendedmonthly average≤ 56 lb/dMay–Nov
Solids, total suspendedmonthly average≤ 94 lb/dJan, Feb, Mar, Apr, Dec
Solids, total suspendedmaximum weekly average≤ 84 lb/dMay–Nov
Solids, total suspendedmaximum weekly average≤ 140 lb/dJan, Feb, Mar, Apr, Dec
Nitrogen, ammonia total [as N]monthly average≤ 8.6 mg/LMay–Nov
Nitrogen, ammonia total [as N]monthly average≤ 9.3 mg/LJan, Feb, Mar, Apr, Dec
Nitrogen, ammonia total [as N]monthly average≤ 1.6 mg/LMay–Nov
Nitrogen, ammonia total [as N]monthly average≤ 3.2 mg/LJan, Feb, Mar, Apr, Dec
Nitrogen, ammonia total [as N]maximum weekly average≤ 12.9 mg/LMay–Nov
Nitrogen, ammonia total [as N]maximum weekly average≤ 14 mg/LJan, Feb, Mar, Apr, Dec
Nitrogen, ammonia total [as N]maximum weekly average≤ 2.4 mg/LMay–Nov
Nitrogen, ammonia total [as N]maximum weekly average≤ 4.8 mg/LJan, Feb, Mar, Apr, Dec
Nitrogen, ammonia total [as N]monthly average≤ 5 lb/dMay–Nov
Nitrogen, ammonia total [as N]monthly average≤ 10 lb/dJan, Feb, Mar, Apr, Dec
Nitrogen, ammonia total [as N]maximum weekly average≤ 7.5 lb/dMay–Nov
Nitrogen, ammonia total [as N]maximum weekly average≤ 15 lb/dJan, Feb, Mar, Apr, Dec
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year
E. coli, colony forming units [CFU]monthly geometric mean≤ 125 CFU/100mLApr–Oct
E. coli, colony forming units [CFU]daily maximum≤ 235 CFU/100mLApr–Oct
BOD, carbonaceous [5 day, 20 C]monthly average≤ 15 mg/LMay–Nov
BOD, carbonaceous [5 day, 20 C]monthly average≤ 25 mg/LJan, Feb, Mar, Apr, Dec
BOD, carbonaceous [5 day, 20 C]maximum weekly average≤ 23 mg/LMay–Nov
BOD, carbonaceous [5 day, 20 C]maximum weekly average≤ 40 mg/LJan, Feb, Mar, Apr, Dec
BOD, carbonaceous [5 day, 20 C]monthly average≤ 47 lb/dMay–Nov
BOD, carbonaceous [5 day, 20 C]monthly average≤ 78.2 lb/dJan, Feb, Mar, Apr, Dec
BOD, carbonaceous [5 day, 20 C]maximum weekly average≤ 72 lb/dMay–Nov
BOD, carbonaceous [5 day, 20 C]maximum weekly average≤ 125.2 lb/dJan, Feb, Mar, Apr, Dec
Flow, totalmonthly totalreport only (Mgal/mo)all year

How strict are these limits?

Cited limits by parameter: Indiana'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/IN0024503 · MCP: https://passage-data.com/mcp