Oak Park Conservancy District — NPDES permit IN0023965: limits, due date and EPA's record

Sewage treatment plant, major discharger, Jeffersonville, Indiana. NPDES permit IN0023965, in force until Mar 31, 2028. Last 12 months: no values over a limit, 8 of 22 reports late. Source: EPA ECHO, Oct 22, 2026.

Limits in force (66)

Parameter	Statistic	Limit	Months	Outfall
pH	daily minimum	≥ 6 SU	all year	001
pH	daily maximum	≤ 9 SU	all year	001
Solids, total suspended	monthly average	≤ 30 mg/L	all year	001
Solids, total suspended	maximum weekly average	≤ 45 mg/L	all year	001
Solids, total suspended	monthly average	≤ 307.9 lb/d	all year	001
Solids, total suspended	maximum weekly average	≤ 461.9 lb/d	all year	001
Nitrogen, total [as N]	monthly average	report only (mg/L)	all year	001
Nitrogen, total [as N]	monthly average	report only (lb/d)	all year	001
Nitrogen, ammonia total [as N]	monthly average	≤ 3 mg/L	May–Nov	001
Nitrogen, ammonia total [as N]	monthly average	≤ 9.6 mg/L	Jan, Feb, Mar, Apr, Dec	001
Nitrogen, ammonia total [as N]	maximum weekly average	≤ 4.5 mg/L	May–Nov	001
Nitrogen, ammonia total [as N]	maximum weekly average	≤ 14.4 mg/L	Jan, Feb, Mar, Apr, Dec	001
Nitrogen, ammonia total [as N]	monthly average	≤ 31 lb/d	May–Nov	001
Nitrogen, ammonia total [as N]	monthly average	≤ 100 lb/d	Jan, Feb, Mar, Apr, Dec	001
Nitrogen, ammonia total [as N]	maximum weekly average	≤ 46.5 lb/d	May–Nov	001
Nitrogen, ammonia total [as N]	maximum weekly average	≤ 150 lb/d	Jan, Feb, Mar, Apr, Dec	001
Nitrogen, Kjeldahl, total [as N]	daily maximum	report only (mg/L)	all year	001
Nitrogen, Kjeldahl, total [as N]	daily maximum	report only (lb/d)	all year	001
Nitrite + Nitrate total [as N]	daily maximum	report only (mg/L)	all year	001
Nitrite + Nitrate total [as N]	daily maximum	report only (lb/d)	all year	001
Phosphorus, total [as P]	monthly average	≤ 1 mg/L	all year	001
Phosphorus, total [as P]	monthly average	report only (lb/d)	all year	001
Flow, in conduit or thru treatment plant	monthly average	report only (MGD)	all year	001
Chlorine, total residual	monthly average	< .06 mg/L	all year	001
Chlorine, total residual	daily maximum	< .06 mg/L	all year	001
E. coli, colony forming units [CFU]	monthly geometric mean	≤ 125 CFU/100mL	Apr–Oct	001
E. coli, colony forming units [CFU]	daily maximum	≤ 235 CFU/100mL	Apr–Oct	001
Coliform, fecal general	monthly average	≤ 2000 #/100mL	Jan, Feb, Mar, Nov, Dec	001
BOD, carbonaceous [5 day, 20 C]	monthly average	≤ 25 mg/L	all year	001
BOD, carbonaceous [5 day, 20 C]	maximum weekly average	≤ 40 mg/L	all year	001
BOD, carbonaceous [5 day, 20 C]	monthly average	≤ 256.6 lb/d	all year	001
BOD, carbonaceous [5 day, 20 C]	maximum weekly average	≤ 410.6 lb/d	all year	001
Flow, total	monthly total	report only (Mgal/mo)	all year	001
pH	daily minimum	≥ 6 SU	all year	002
pH	daily maximum	≤ 9 SU	all year	002
Solids, total suspended	monthly average	≤ 30 mg/L	all year	002
Solids, total suspended	maximum weekly average	≤ 45 mg/L	all year	002
Solids, total suspended	monthly average	≤ 307.6 lb/d	all year	002
Solids, total suspended	maximum weekly average	≤ 461.9 lb/d	all year	002
Nitrogen, total [as N]	monthly average	report only (mg/L)	all year	002
Nitrogen, total [as N]	monthly average	report only (lb/d)	all year	002
Nitrogen, ammonia total [as N]	monthly average	≤ 3 mg/L	May–Nov	002
Nitrogen, ammonia total [as N]	monthly average	≤ 9.6 mg/L	Jan, Feb, Mar, Apr, Dec	002
Nitrogen, ammonia total [as N]	maximum weekly average	≤ 4.5 mg/L	May–Nov	002
Nitrogen, ammonia total [as N]	maximum weekly average	≤ 14.4 mg/L	Jan, Feb, Mar, Apr, Dec	002
Nitrogen, ammonia total [as N]	monthly average	≤ 31 lb/d	May–Nov	002
Nitrogen, ammonia total [as N]	monthly average	≤ 100 lb/d	Jan, Feb, Mar, Apr, Dec	002
Nitrogen, ammonia total [as N]	maximum weekly average	≤ 46.5 lb/d	May–Nov	002
Nitrogen, ammonia total [as N]	maximum weekly average	≤ 150 lb/d	Jan, Feb, Mar, Apr, Dec	002
Nitrogen, Kjeldahl, total [as N]	daily maximum	report only (mg/L)	all year	002
Nitrogen, Kjeldahl, total [as N]	daily maximum	report only (lb/d)	all year	002
Nitrite + Nitrate total [as N]	daily maximum	report only (mg/L)	all year	002
Nitrite + Nitrate total [as N]	daily maximum	report only (lb/d)	all year	002
Phosphorus, total [as P]	monthly average	≤ 1 mg/L	all year	002
Phosphorus, total [as P]	monthly average	report only (lb/d)	all year	002
Flow, in conduit or thru treatment plant	monthly average	report only (MGD)	all year	002
Chlorine, total residual	monthly average	< .06 mg/L	all year	002
Chlorine, total residual	daily maximum	< .06 mg/L	all year	002
E. coli, colony forming units [CFU]	monthly geometric mean	≤ 125 CFU/100mL	all year	002
E. coli, colony forming units [CFU]	daily maximum	≤ 235 CFU/100mL	all year	002
Coliform, fecal general	monthly average	≤ 2000 #/100mL	Jan, Feb, Mar, Nov, Dec	002
BOD, carbonaceous [5 day, 20 C]	monthly average	≤ 25 mg/L	all year	002
BOD, carbonaceous [5 day, 20 C]	maximum weekly average	≤ 40 mg/L	all year	002
BOD, carbonaceous [5 day, 20 C]	monthly average	≤ 256.6 lb/d	all year	002
BOD, carbonaceous [5 day, 20 C]	maximum weekly average	≤ 410.6 lb/d	all year	002
Flow, total	monthly total	report only (Mgal/mo)	all year	002

How strict are these limits?

Your permit document is the final word. As JSON: /api/v1/permits/IN0023965 · MCP: https://passage-data.com/mcp