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Bluffton WWTP, City of

Sewage treatment plant, major discharger, Bluffton, Indiana. NPDES permit IN0022411, in force until Nov 30, 2030. Last 12 months: over a limit 5 times (last August 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: outfall 001 form A monthly (24 values), outfall 005 form CP monthly (13 values)
Last report on file
August 2026
Oct 2024 – Sep 2025
0 values over a limit, 0 required values missing, 0 of 28 reports late

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

Period endingOutfallParameterReportedLimitOver by
March 2026001Nitrogen, ammonia total [as N], monthly average1.88 mg/L≤ 1.6 mg/L18%
March 2026001Nitrogen, ammonia total [as N], weekly average7.73 mg/L≤ 2.4 mg/L222%
April 2026001Solids, total suspended, weekly average18.9 mg/L≤ 18 mg/L5%
May 2026001Solids, total suspended, weekly average20.62 mg/L≤ 18 mg/L15%
August 2026005Chlorine, total residual, daily maximum.06 mg/L< .06 mg/L0%

Limits in force (59)

ParameterStatisticLimitMonthsOutfall
Oxygen, dissolved [DO]daily average minimum≥ 6 mg/Lall year001
pHdaily minimum≥ 6 SUall year001
pHdaily maximum≤ 9 SUall year001
Solids, total suspendedmonthly average≤ 12 mg/Lall year001
Solids, total suspendedweekly average≤ 18 mg/Lall year001
Solids, total suspendedmonthly average≤ 600 lb/dall year001
Solids, total suspendedweekly average≤ 900 lb/dall year001
Nitrogen, total [as N]monthly averagereport only (mg/L)all year001
Nitrogen, total [as N]monthly averagereport only (lb/d)all year001
Nitrogen, ammonia total [as N]monthly average≤ 1.1 mg/LMay–Nov001
Nitrogen, ammonia total [as N]monthly average≤ 1.6 mg/LJan, Feb, Mar, Apr, Dec001
Nitrogen, ammonia total [as N]weekly average≤ 1.6 mg/LMay–Nov001
Nitrogen, ammonia total [as N]weekly average≤ 2.4 mg/LJan, Feb, Mar, Apr, Dec001
Nitrogen, ammonia total [as N]monthly average≤ 55 lb/dMay–Nov001
Nitrogen, ammonia total [as N]monthly average≤ 80 lb/dJan, Feb, Mar, Apr, Dec001
Nitrogen, ammonia total [as N]weekly average≤ 80 lb/dMay–Nov001
Nitrogen, ammonia total [as N]weekly average≤ 120 lb/dJan, Feb, Mar, Apr, Dec001
Phosphorus, total [as P]monthly average≤ 1 mg/Lall year001
Phosphorus, total [as P]monthly averagereport only (lb/d)all year001
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year001
E. coli, colony forming units [CFU]monthly geometric mean≤ 125 CFU/100mLApr–Oct001
E. coli, colony forming units [CFU]daily maximum≤ 235 CFU/100mLApr–Oct001
Toxicity [acute], Ceriodaphnia dubiamaximum≤ 1 tox acuteNov001
Toxicity [chronic], Ceriodaphnia dubiamaximum≤ 1.2 tox chronicNov001
Toxicity [acute], Pimephales promelas [Fathead Minnow]maximum≤ 1 tox acuteNov001
Toxicity [chronic], Pimephales promelas [Fathead Minnow]maximum≤ 1.2 tox chronicNov001
BOD, carbonaceous [5 day, 20 C]monthly average≤ 10 mg/Lall year001
BOD, carbonaceous [5 day, 20 C]weekly average≤ 15 mg/Lall year001
BOD, carbonaceous [5 day, 20 C]monthly average≤ 500 lb/dall year001
BOD, carbonaceous [5 day, 20 C]weekly average≤ 750 lb/dall year001
Phosphorus, total percent removalmonthly average minimum≥ 70 %all year001
Flow, totalmonthly totalreport only (Mgal/mo)all year001
pHdaily minimumreport only (SU)all year005
pHdaily maximumreport only (SU)all year005
Solids, total suspendedmonthly averagereport only (mg/L)all year005
Solids, total suspendeddaily maximumreport only (mg/L)all year005
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year005
Flow, in conduit or thru treatment plantmaximum weekly averagereport only (MGD)all year005
Chlorine, total residualmonthly average< .06 mg/LApr–Oct005
Chlorine, total residualdaily maximum< .06 mg/LApr–Oct005
E. coli, colony forming units [CFU]monthly geometric mean≤ 125 CFU/100mLApr–Oct005
E. coli, colony forming units [CFU]daily maximum≤ 235 CFU/100mLApr–Oct005
BOD, carbonaceous [5 day, 20 C]monthly averagereport only (mg/L)all year005
BOD, carbonaceous [5 day, 20 C]daily maximumreport only (mg/L)all year005
Flow, totalmonthly totalreport only (Mgal/mo)all year005
Copper, dry weightvaluereport only (mg/kg)Jun, DecPRT
Copper, dry weightvaluereport only (mg/kg)Jun, DecPRT
Cadmium, dry weightvaluereport only (mg/kg)Jun, DecPRT
Cadmium, dry weightvaluereport only (mg/kg)Jun, DecPRT
Molybdenum, sludge, total, dry weight [as Mo]valuereport only (mg/kg)Jun, DecPRT
Molybdenum, sludge, total, dry weight [as Mo]valuereport only (mg/kg)Jun, DecPRT
Zinc, sludge, total, dry weight [as Zn]valuereport only (mg/kg)Jun, DecPRT
Zinc, sludge, total, dry weight [as Zn]valuereport only (mg/kg)Jun, DecPRT
Lead, sludge, total, dry weight [as Pb]valuereport only (mg/kg)Jun, DecPRT
Lead, sludge, total, dry weight [as Pb]valuereport only (mg/kg)Jun, DecPRT
Nickel, sludge, total, dry weight [as Ni]valuereport only (mg/kg)Jun, DecPRT
Nickel, sludge, total, dry weight [as Ni]valuereport only (mg/kg)Jun, DecPRT
Mercury, sludge, total, dry weight [as Hg]valuereport only (mg/kg)Jun, DecPRT
Mercury, sludge, total, dry weight [as Hg]valuereport only (mg/kg)Jun, DecPRT

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/IN0022411 · MCP: https://passage-data.com/mcp