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Ladoga Municipal WWTP

Sewage treatment plant, Ladoga, Indiana. NPDES permit IN0023418, in force until Jul 31, 2027. Last 12 months: over a limit 8 times (last May 2026), 1 required value missing, 1 of 11 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: form A monthly (25 values)
Renewal application due
Feb 1, 2027 · 180 days before expiry; your permit may set another date
Last report on file
August 2026
Oct 2024 – Sep 2025
5 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 2025Nitrogen, ammonia total [as N], maximum weekly average4.14 mg/L≤ 3.77 mg/L10%
January 2026Nitrogen, ammonia total [as N], monthly average8.33 mg/L≤ 3.92 mg/L113%
January 2026Nitrogen, ammonia total [as N], maximum weekly average21.95 mg/L≤ 5.88 mg/L273%
February 2026Nitrogen, ammonia total [as N], monthly average7 mg/L≤ 3.92 mg/L79%
February 2026Nitrogen, ammonia total [as N], maximum weekly average10.3 mg/L≤ 5.88 mg/L75%
March 2026Nitrogen, ammonia total [as N], maximum weekly average13.876 lb/d≤ 12.3 lb/d13%
March 2026Solids, total suspended, maximum weekly average118.66 lb/d≤ 93.8 lb/d27%
May 2026Solids, total suspended, maximum weekly average95.6 lb/d≤ 93.8 lb/d2%

Limits in force (30)

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≤ 30 mg/Lall year
Solids, total suspendedmaximum weekly average≤ 45 mg/Lall year
Solids, total suspendedmonthly average≤ 62.6 lb/dall year
Solids, total suspendedmaximum weekly average≤ 93.8 lb/dall year
Nitrogen, ammonia total [as N]monthly average≤ 2.51 mg/LMay–Nov
Nitrogen, ammonia total [as N]monthly average≤ 3.92 mg/LJan, Feb, Mar, Apr, Dec
Nitrogen, ammonia total [as N]maximum weekly average≤ 3.77 mg/LMay–Nov
Nitrogen, ammonia total [as N]maximum weekly average≤ 5.88 mg/LJan, Feb, Mar, Apr, Dec
Nitrogen, ammonia total [as N]monthly average≤ 5.2 lb/dMay–Nov
Nitrogen, ammonia total [as N]monthly average≤ 8.2 lb/dJan, Feb, Mar, Apr, Dec
Nitrogen, ammonia total [as N]maximum weekly average≤ 7.9 lb/dMay–Nov
Nitrogen, ammonia total [as N]maximum weekly average≤ 12.3 lb/dJan, Feb, Mar, Apr, Dec
Phosphorus, total [as P]monthly averagereport only (mg/L)all 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
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/Lall year
BOD, carbonaceous [5 day, 20 C]maximum weekly average≤ 40 mg/Lall year
BOD, carbonaceous [5 day, 20 C]monthly average≤ 52.1 lb/dall year
BOD, carbonaceous [5 day, 20 C]maximum weekly average≤ 83.4 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.

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/IN0023418 · MCP: https://passage-data.com/mcp