Passage Data · Check a report · Use it from your AI

Ossian WWTP, Town of

Sewage treatment plant, Ossian, Indiana. NPDES permit IN0020745, in force until Sep 30, 2030. 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 (19 values)
Last report on file
September 2026
Oct 2024 – Sep 2025
0 values over a limit, 0 required values missing, 1 of 12 reports late

Limits in force (24)

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≤ 18 mg/Lall year
Solids, total suspendedmaximum weekly average≤ 27 mg/Lall year
Solids, total suspendedmonthly average≤ 135.2 lb/dall year
Solids, total suspendedmaximum weekly average≤ 202.8 lb/dall year
Nitrogen, ammonia total [as N]monthly average≤ 1.22 mg/LMay–Nov
Nitrogen, ammonia total [as N]monthly average≤ 1.78 mg/LJan, Feb, Mar, Apr, Dec
Nitrogen, ammonia total [as N]maximum weekly average≤ 1.83 mg/LMay–Nov
Nitrogen, ammonia total [as N]maximum weekly average≤ 2.67 mg/LJan, Feb, Mar, Apr, Dec
Nitrogen, ammonia total [as N]monthly average≤ 9.2 lb/dMay–Nov
Nitrogen, ammonia total [as N]monthly average≤ 13.4 lb/dJan, Feb, Mar, Apr, Dec
Nitrogen, ammonia total [as N]maximum weekly average≤ 13.7 lb/dMay–Nov
Nitrogen, ammonia total [as N]maximum weekly average≤ 20.1 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≤ 15 mg/Lall year
BOD, carbonaceous [5 day, 20 C]maximum weekly average≤ 23 mg/Lall year
BOD, carbonaceous [5 day, 20 C]monthly average≤ 112.7 lb/dall year
BOD, carbonaceous [5 day, 20 C]maximum weekly average≤ 172.7 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

· Save this facility as a site · Superfund sites nearby · Your permits on one board

On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/IN0020745 · MCP: https://passage-data.com/mcp