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

Monon Municipal WWTP

Sewage treatment plant, Monon, Indiana. NPDES permit IN0021580, in force until Nov 30, 2026. Last 12 months: over a limit 10 times (last August 2026), 9 required values missing, 1 of 11 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: form A monthly (27 values)
Renewal application due
Jun 3, 2026 · 180 days before expiry; your permit may set another date
Last report on file
August 2026
Oct 2024 – Sep 2025
48 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
October 2025Chlorine, total residual, daily maximum.11 mg/L< .06 mg/L83%
April 2026Chlorine, total residual, daily minimum.04 mg/L≥ .5 mg/L92%
April 2026Chlorine, total residual, daily maximum.1 mg/L< .06 mg/L67%
April 2026E. coli, colony forming units [CFU], daily maximum770.1 CFU/100mL≤ 235 CFU/100mL228%
June 2026BOD, carbonaceous [5 day, 20 C], maximum weekly average44.01 lb/d≤ 28 lb/d57%
June 2026Chlorine, total residual, daily minimum.2 mg/L≥ .5 mg/L60%
June 2026Nitrogen, ammonia total [as N], maximum weekly average9.352 lb/d≤ 5.9 lb/d59%
June 2026Solids, total suspended, maximum weekly average39.62 lb/d≤ 33 lb/d20%
July 2026Chlorine, total residual, daily minimum.13 mg/L≥ .5 mg/L74%
August 2026Chlorine, total residual, daily minimum.27 mg/L≥ .5 mg/L46%

Limits in force (40)

ParameterStatisticLimitMonths
Oxygen, dissolved [DO]daily average minimum≥ 5 mg/LMay–Nov
Oxygen, dissolved [DO]daily average minimum≥ 4 mg/LJan, Feb, Mar, Apr, Dec
pHdaily minimum≥ 6 SUall year
pHdaily maximum≤ 9 SUall year
Solids, total suspendedmonthly average≤ 30 mg/LJan, Feb, Mar, Apr, Dec
Solids, total suspendedmonthly average≤ 12 mg/LMay–Nov
Solids, total suspendedmaximum weekly average≤ 45 mg/LJan, Feb, Mar, Apr, Dec
Solids, total suspendedmaximum weekly average≤ 18 mg/LMay–Nov
Solids, total suspendedmonthly average≤ 55 lb/dJan, Feb, Mar, Apr, Dec
Solids, total suspendedmonthly average≤ 22 lb/dMay–Nov
Solids, total suspendedmaximum weekly average≤ 83 lb/dJan, Feb, Mar, Apr, Dec
Solids, total suspendedmaximum weekly average≤ 33 lb/dMay–Nov
Nitrogen, ammonia total [as N]monthly average≤ 2.1 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≤ 3.2 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≤ 3.9 lb/dMay–Nov
Nitrogen, ammonia total [as N]monthly average≤ 5.9 lb/dJan, Feb, Mar, Apr, Dec
Nitrogen, ammonia total [as N]maximum weekly average≤ 5.9 lb/dMay–Nov
Nitrogen, ammonia total [as N]maximum weekly average≤ 8.9 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
Flow, in conduit or thru treatment plantmaximum weekly averagereport only (MGD)all year
Chlorine, total residualmonthly average< .06 mg/LApr–Oct
Chlorine, total residualdaily maximum< .06 mg/LApr–Oct
Chlorine, total residualdaily minimum≥ .5 mg/LApr–Oct
Chlorine, total residualdaily maximumreport only (mg/L)Apr–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
BOD, carbonaceous [5 day, 20 C]monthly average≤ 25 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≤ 40 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≤ 46 lb/dJan, Feb, Mar, Apr, Dec
BOD, carbonaceous [5 day, 20 C]monthly average≤ 18 lb/dMay–Nov
BOD, carbonaceous [5 day, 20 C]maximum weekly average≤ 74 lb/dJan, Feb, Mar, Apr, Dec
BOD, carbonaceous [5 day, 20 C]maximum weekly average≤ 28 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.

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/IN0021580 · MCP: https://passage-data.com/mcp