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Knightstown WWTP

Sewage treatment plant, Knightstown, Indiana. NPDES permit IN0040177, in force until Jun 30, 2028. Last 12 months: over a limit 5 times (last August 2026), 17 required values missing, 3 of 11 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: form A monthly (18 values)
Renewal application due
Jan 2, 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, 0 required values missing, 1 of 12 reports late

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

Period endingParameterReportedLimitOver by
March 2026Solids, total suspended, monthly average82.9 mg/L≤ 30 mg/L176%
March 2026Solids, total suspended, monthly average897.3 lb/d≤ 200 lb/d349%
March 2026Solids, total suspended, maximum weekly average301.7 mg/L≤ 45 mg/L570%
March 2026Solids, total suspended, maximum weekly average3413 lb/d≤ 300 lb/d1038%
August 2026Solids, total suspended, maximum weekly average474.2 lb/d≤ 300 lb/d58%

Limits in force (22)

ParameterStatisticLimitMonths
pHdaily minimum≥ 6 SUall year
pHdaily maximum≤ 9 SUall year
Solids, total suspendedmonthly average≤ 30 mg/Lall year
Solids, total suspendedmaximum weekly average≤ 45 mg/Lall year
Solids, total suspendedmonthly average≤ 200 lb/dall year
Solids, total suspendedmaximum weekly average≤ 300 lb/dall year
Nitrogen, ammonia total [as N]monthly average≤ 9.4 mg/LMay–Nov
Nitrogen, ammonia total [as N]monthly average≤ 10.2 mg/LJan, Feb, Mar, Apr, Dec
Nitrogen, ammonia total [as N]maximum weekly average≤ 14.1 mg/LMay–Nov
Nitrogen, ammonia total [as N]maximum weekly average≤ 15.3 mg/LJan, Feb, Mar, Apr, Dec
Nitrogen, ammonia total [as N]monthly average≤ 63 lb/dMay–Nov
Nitrogen, ammonia total [as N]monthly average≤ 68 lb/dJan, Feb, Mar, Apr, Dec
Nitrogen, ammonia total [as N]maximum weekly average≤ 94 lb/dMay–Nov
Nitrogen, ammonia total [as N]maximum weekly average≤ 100 lb/dJan, Feb, Mar, Apr, Dec
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≤ 25 mg/Lall year
BOD, carbonaceous [5 day, 20 C]maximum weekly average≤ 40 mg/Lall year
BOD, carbonaceous [5 day, 20 C]monthly average≤ 170 lb/dall year
BOD, carbonaceous [5 day, 20 C]maximum weekly average≤ 270 lb/dall 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.

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/IN0040177 · MCP: https://passage-data.com/mcp