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Austin WWTP

Sewage treatment plant, major discharger, Austin, Indiana. NPDES permit IN0025135, in force until Aug 31, 2030. Last 12 months: over a limit 10 times (last July 2026), 2 required values missing, 1 of 15 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: form A monthly (25 values), form TX yearly (8 values)
Last report on file
September 2026
Oct 2024 – Sep 2025
24 values over a limit, 0 required values missing, 3 of 16 reports late

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

Period endingParameterReportedLimitOver by
December 2025Solids, total suspended, monthly average10.3 mg/L≤ 10 mg/L3%
December 2025Solids, total suspended, maximum weekly average17.4 mg/L≤ 15 mg/L16%
April 2026E. coli, colony forming units [CFU], daily maximum1011 CFU/100mL≤ 235 CFU/100mL330%
April 2026Nitrogen, ammonia total [as N], maximum weekly average3.17 mg/L≤ 2.9 mg/L9%
April 2026Solids, total suspended, maximum weekly average324 lb/d≤ 250 lb/d30%
May 2026E. coli, colony forming units [CFU], daily maximum1011 CFU/100mL≤ 235 CFU/100mL330%
May 2026Oxygen, dissolved [DO], daily average minimum5.6 mg/L≥ 6 mg/L7%
May 2026Solids, total suspended, maximum weekly average345.2 lb/d≤ 250 lb/d38%
June 2026E. coli, colony forming units [CFU], daily maximum1011 CFU/100mL≤ 235 CFU/100mL330%
July 2026Phosphorus, total [as P], monthly average2.005 mg/L≤ 1 mg/L101%

Limits in force (56)

ParameterStatisticLimitMonthsOutfall
Oxygen, dissolved [DO]daily average minimum≥ 6 mg/LMay–Nov001
Oxygen, dissolved [DO]daily average minimum≥ 5 mg/LJan, Feb, Mar, Apr, Dec001
pHdaily minimum≥ 6 SUall year001
pHdaily maximum≤ 9 SUall year001
Solids, total suspendedmonthly average≤ 10 mg/Lall year001
Solids, total suspendedmaximum weekly average≤ 15 mg/Lall year001
Solids, total suspendedmonthly average≤ 167 lb/dall year001
Solids, total suspendedmaximum weekly average≤ 250 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≤ 1.3 mg/LMay–Nov001
Nitrogen, ammonia total [as N]monthly average≤ 1.9 mg/LJan, Feb, Mar, Apr, Dec001
Nitrogen, ammonia total [as N]maximum weekly average≤ 1.9 mg/LMay–Nov001
Nitrogen, ammonia total [as N]maximum weekly average≤ 2.9 mg/LJan, Feb, Mar, Apr, Dec001
Nitrogen, ammonia total [as N]monthly average≤ 21.7 lb/dMay–Nov001
Nitrogen, ammonia total [as N]monthly average≤ 31.7 lb/dJan, Feb, Mar, Apr, Dec001
Nitrogen, ammonia total [as N]maximum weekly average≤ 31.7 lb/dMay–Nov001
Nitrogen, ammonia total [as N]maximum weekly average≤ 48.4 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
Chlorine, total residualmonthly average< .06 mg/LApr–Oct001
Chlorine, total residualdaily maximum< .06 mg/LApr–Oct001
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 acuteAug001
Toxicity [acute], Ceriodaphnia dubiamaximum≤ 1 tox acuteSep001
Toxicity [acute], Ceriodaphnia dubiamaximum≤ 1 tox acuteSep001
Toxicity [chronic], Ceriodaphnia dubiamaximum≤ 1 tox chronicAug001
Toxicity [chronic], Ceriodaphnia dubiamaximum≤ 1 tox chronicSep001
Toxicity [chronic], Ceriodaphnia dubiamaximum≤ 1 tox chronicSep001
Toxicity [acute], Pimephales promelas [Fathead Minnow]maximum≤ 1 tox acuteAug001
Toxicity [acute], Pimephales promelas [Fathead Minnow]maximum≤ 1 tox acuteSep001
Toxicity [acute], Pimephales promelas [Fathead Minnow]maximum≤ 1 tox acuteSep001
Toxicity [chronic], Pimephales promelas [Fathead Minnow]maximum≤ 1 tox chronicAug001
Toxicity [chronic], Pimephales promelas [Fathead Minnow]maximum≤ 1 tox chronicSep001
Toxicity [chronic], Pimephales promelas [Fathead Minnow]maximum≤ 1 tox chronicSep001
BOD, carbonaceous [5 day, 20 C]monthly average≤ 10 mg/Lall year001
BOD, carbonaceous [5 day, 20 C]maximum weekly average≤ 15 mg/Lall year001
BOD, carbonaceous [5 day, 20 C]monthly average≤ 167 lb/dall year001
BOD, carbonaceous [5 day, 20 C]maximum weekly average≤ 250 lb/dall year001
Flow, totalmonthly totalreport only (Mgal/mo)all year001
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/IN0025135 · MCP: https://passage-data.com/mcp