Centerville WWTP — NPDES permit IN0022535: limits, due date and EPA's record

Sewage treatment plant, major discharger, Centerville, Indiana. NPDES permit IN0022535, in force until Mar 31, 2029. Last 12 months: over a limit 3 times (last August 2026), 1 required value missing, 3 of 22 reports late. Source: EPA ECHO, Oct 22, 2026.

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

Period ending	Parameter	Reported	Limit	Over by
August 2026	Chlorine, total residual, daily maximum	1.11 mg/L	< .06 mg/L	1750%
August 2026	Chlorine, total residual, monthly average	.064 mg/L	< .06 mg/L	7%
August 2026	E. coli, colony forming units [CFU], daily maximum	816.4 CFU/100mL	≤ 235 CFU/100mL	247%

Limits in force (40)

Parameter	Statistic	Limit	Months	Outfall
Oxygen, dissolved [DO]	daily average minimum	≥ 6 mg/L	May–Nov	001
Oxygen, dissolved [DO]	daily average minimum	≥ 5 mg/L	Jan, Feb, Mar, Apr, Dec	001
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	≤ 250 lb/d	all year	001
Solids, total suspended	maximum weekly average	≤ 376 lb/d	all year	001
Nitrogen, ammonia total [as N]	monthly average	≤ 1.8 mg/L	May–Nov	001
Nitrogen, ammonia total [as N]	monthly average	≤ 3.7 mg/L	Jan, Feb, Mar, Apr, Dec	001
Nitrogen, ammonia total [as N]	maximum weekly average	≤ 2.7 mg/L	May–Nov	001
Nitrogen, ammonia total [as N]	maximum weekly average	≤ 5.6 mg/L	Jan, Feb, Mar, Apr, Dec	001
Nitrogen, ammonia total [as N]	monthly average	≤ 15 lb/d	May–Nov	001
Nitrogen, ammonia total [as N]	monthly average	≤ 30.9 lb/d	Jan, Feb, Mar, Apr, Dec	001
Nitrogen, ammonia total [as N]	maximum weekly average	≤ 22.5 lb/d	May–Nov	001
Nitrogen, ammonia total [as N]	maximum weekly average	≤ 46.7 lb/d	Jan, Feb, Mar, Apr, Dec	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	Apr–Oct	001
Chlorine, total residual	daily maximum	< .06 mg/L	Apr–Oct	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
Toxicity [acute], Ceriodaphnia dubia	maximum	≤ 1 tox acute	Sep	001
Toxicity [acute], Ceriodaphnia dubia	maximum	≤ 1 tox acute	Oct	001
Toxicity [chronic], Ceriodaphnia dubia	maximum	≤ 1.3 tox chronic	Sep	001
Toxicity [chronic], Ceriodaphnia dubia	maximum	≤ 1.3 tox chronic	Oct	001
Toxicity [acute], Pimephales promelas [Fathead Minnow]	maximum	≤ 1 tox acute	Sep	001
Toxicity [acute], Pimephales promelas [Fathead Minnow]	maximum	≤ 1 tox acute	Oct	001
Toxicity [chronic], Pimephales promelas [Fathead Minnow]	maximum	≤ 1.3 tox chronic	Sep	001
Toxicity [chronic], Pimephales promelas [Fathead Minnow]	maximum	≤ 1.3 tox chronic	Oct	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	≤ 209 lb/d	all year	001
BOD, carbonaceous [5 day, 20 C]	maximum weekly average	≤ 334 lb/d	all year	001
Flow, total	monthly total	report only (Mgal/mo)	all year	001
Duration	monthly total	report only (hr/mo)	all year	002
Overflow volume [SS0 volume, CSO volume]	monthly total	report only (Mgal)	all year	002
Precipitation, monthly accumulation	monthly total	report only (in/mo)	all year	002
Discharge event observation [Visual Monitoring]	monthly total	report only (occur/mo)	all year	002

How strict are these limits?

Your permit document is the final word. As JSON: /api/v1/permits/IN0022535 · MCP: https://passage-data.com/mcp