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Palmyra WWTP

Sewage treatment plant, Palmyra, Indiana. NPDES permit IN0039403, in force until Mar 31, 2028. Last 12 months: over a limit 8 times (last July 2026), 6 of 11 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: form A monthly (19 values)
Renewal application due
Oct 3, 2027 · 180 days before expiry; your permit may set another date
Last report on file
August 2026
Oct 2024 – Sep 2025
31 values over a limit, 0 required values missing, 5 of 12 reports late

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

Period endingParameterReportedLimitOver by
January 2026Nitrogen, ammonia total [as N], maximum weekly average2.779 mg/L≤ 2.4 mg/L16%
February 2026Nitrogen, ammonia total [as N], monthly average3.9347 lb/d≤ 1.9 lb/d107%
February 2026Nitrogen, ammonia total [as N], monthly average4.3081 mg/L≤ 1.6 mg/L169%
February 2026Nitrogen, ammonia total [as N], maximum weekly average7.1099 lb/d≤ 2.8 lb/d154%
February 2026Nitrogen, ammonia total [as N], maximum weekly average7.225 mg/L≤ 2.4 mg/L201%
June 2026E. coli, colony forming units [CFU], daily maximum1413.6 CFU/100mL≤ 235 CFU/100mL502%
June 2026E. coli, colony forming units [CFU], monthly geometric mean139 CFU/100mL≤ 125 CFU/100mL11%
July 2026E. coli, colony forming units [CFU], daily maximum410.6 CFU/100mL≤ 235 CFU/100mL75%

Limits in force (23)

ParameterStatisticLimitMonths
Oxygen, dissolved [DO]daily average minimum≥ 6 mg/Lall year
pHdaily minimum≥ 6 SUall year
pHdaily maximum≤ 9 SUall year
Solids, total suspendedmonthly average≤ 12 mg/Lall year
Solids, total suspendedmaximum weekly average≤ 18 mg/Lall year
Solids, total suspendedmonthly average≤ 14 lb/dall year
Solids, total suspendedmaximum weekly average≤ 21 lb/dall year
Nitrogen, ammonia total [as N]monthly average≤ 1.1 mg/LMay–Nov
Nitrogen, ammonia total [as N]monthly average≤ 1.6 mg/LJan, Feb, Mar, Apr, Dec
Nitrogen, ammonia total [as N]maximum weekly average≤ 1.6 mg/LMay–Nov
Nitrogen, ammonia total [as N]maximum weekly average≤ 2.4 mg/LJan, Feb, Mar, Apr, Dec
Nitrogen, ammonia total [as N]monthly average≤ 1.3 lb/dMay–Nov
Nitrogen, ammonia total [as N]monthly average≤ 1.9 lb/dJan, Feb, Mar, Apr, Dec
Nitrogen, ammonia total [as N]maximum weekly average≤ 1.9 lb/dMay–Nov
Nitrogen, ammonia total [as N]maximum weekly average≤ 2.8 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/100mLall year
E. coli, colony forming units [CFU]daily maximum≤ 235 CFU/100mLall year
BOD, carbonaceous [5 day, 20 C]monthly average≤ 10 mg/Lall year
BOD, carbonaceous [5 day, 20 C]maximum weekly average≤ 15 mg/Lall year
BOD, carbonaceous [5 day, 20 C]monthly average≤ 11.7 lb/dall year
BOD, carbonaceous [5 day, 20 C]maximum weekly average≤ 17.5 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/IN0039403 · MCP: https://passage-data.com/mcp