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Iaw - Sheridan WWTP

Sewage treatment plant, major discharger, Sheridan, Indiana. NPDES permit IN0031071, in force until Sep 30, 2027. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: form A monthly (26 values)
Renewal application due
Apr 3, 2027 · 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, 0 required values missing, 0 of 12 reports late

Limits in force (51)

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 maximum≤ 9 SUall year
Solids, total suspendedmonthly average≤ 24 mg/LJan, Feb, Mar, Apr, Dec
Solids, total suspendedmonthly average≤ 12 mg/LMay–Nov
Solids, total suspendedmaximum weekly average≤ 36 mg/LJan, Feb, Mar, Apr, Dec
Solids, total suspendedmaximum weekly average≤ 18 mg/LMay–Nov
Solids, total suspendedmonthly average≤ 200 lb/dJan, Feb, Mar, Apr, Dec
Solids, total suspendedmonthly average≤ 100 lb/dMay–Nov
Solids, total suspendedmaximum weekly average≤ 300 lb/dJan, Feb, Mar, Apr, Dec
Solids, total suspendedmaximum weekly average≤ 150 lb/dMay–Nov
Nitrogen, total [as N]monthly averagereport only (mg/L)all year
Nitrogen, total [as N]monthly averagereport only (lb/d)all year
Nitrogen, ammonia total [as N]monthly average≤ 1.5 mg/LMay–Nov
Nitrogen, ammonia total [as N]monthly average≤ 2.1 mg/LJan, Feb, Mar, Apr, Dec
Nitrogen, ammonia total [as N]maximum weekly average≤ 2.2 mg/LMay–Nov
Nitrogen, ammonia total [as N]maximum weekly average≤ 3.2 mg/LJan, Feb, Mar, Apr, Dec
Nitrogen, ammonia total [as N]monthly average≤ 12.5 lb/dMay–Nov
Nitrogen, ammonia total [as N]monthly average≤ 17.5 lb/dJan, Feb, Mar, Apr, Dec
Nitrogen, ammonia total [as N]maximum weekly average≤ 18.4 lb/dMay–Nov
Nitrogen, ammonia total [as N]maximum weekly average≤ 26.7 lb/dJan, Feb, Mar, Apr, Dec
Phosphorus, total [as P]monthly average≤ 1 mg/Lall year
Phosphorus, total [as P]monthly averagereport only (lb/d)all year
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year
Chlorine, total residualmonthly average< .06 mg/LApr–Oct
Chlorine, total residualdaily maximum< .06 mg/LApr–Oct
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
Toxicity [acute], Ceriodaphnia dubiamaximum≤ 1 tox acuteApr
Toxicity [acute], Ceriodaphnia dubiamaximum≤ 1 tox acuteApr
Toxicity [acute], Ceriodaphnia dubiamaximum≤ 1 tox acuteMar
Toxicity [chronic], Ceriodaphnia dubiamaximum≤ 1 tox chronicApr
Toxicity [chronic], Ceriodaphnia dubiamaximum≤ 1 tox chronicApr
Toxicity [chronic], Ceriodaphnia dubiamaximum≤ 1 tox chronicMar
Toxicity [acute], Pimephales promelas [Fathead Minnow]maximum≤ 1 tox acuteApr
Toxicity [acute], Pimephales promelas [Fathead Minnow]maximum≤ 1 tox acuteApr
Toxicity [acute], Pimephales promelas [Fathead Minnow]maximum≤ 1 tox acuteMar
Toxicity [chronic], Pimephales promelas [Fathead Minnow]maximum≤ 1 tox chronicApr
Toxicity [chronic], Pimephales promelas [Fathead Minnow]maximum≤ 1 tox chronicApr
Toxicity [chronic], Pimephales promelas [Fathead Minnow]maximum≤ 1 tox chronicMar
BOD, carbonaceous [5 day, 20 C]monthly average≤ 20 mg/LJan, Feb, Mar, Apr, Dec
BOD, carbonaceous [5 day, 20 C]monthly average≤ 10 mg/LMay–Nov
BOD, carbonaceous [5 day, 20 C]maximum weekly average≤ 30 mg/LJan, Feb, Mar, Apr, Dec
BOD, carbonaceous [5 day, 20 C]maximum weekly average≤ 15 mg/LMay–Nov
BOD, carbonaceous [5 day, 20 C]monthly average≤ 167 lb/dJan, Feb, Mar, Apr, Dec
BOD, carbonaceous [5 day, 20 C]monthly average≤ 83 lb/dMay–Nov
BOD, carbonaceous [5 day, 20 C]maximum weekly average≤ 250 lb/dJan, Feb, Mar, Apr, Dec
BOD, carbonaceous [5 day, 20 C]maximum weekly average≤ 125 lb/dMay–Nov
Phosphorus, total percent removalmonthly average minimum≥ 80 %all year
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/IN0031071 · MCP: https://passage-data.com/mcp