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Attica Municipal WWTP

Sewage treatment plant, Attica, Indiana. NPDES permit IN0020222, in force until Dec 31, 2028. Last 12 months: over a limit 2 times (last April 2026), 2 of 24 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: outfall 001 form A monthly (20 values), outfall 003 form C monthly (4 values)
Last report on file
August 2026
Oct 2024 – Sep 2025
2 values over a limit, 1 required value missing, 1 of 26 reports late

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

Period endingParameterReportedLimitOver by
March 2026Solids, total suspended, maximum weekly average50.67 mg/L≤ 45 mg/L13%
April 2026E. coli, colony forming units [CFU], daily maximum435.2 CFU/100mL≤ 235 CFU/100mL85%

Limits in force (39)

ParameterStatisticLimitMonthsOutfall
pHdaily minimum≥ 6 SUall year001
pHdaily maximum≤ 9 SUall year001
Solids, total suspendedmonthly average≤ 30 mg/Lall year001
Solids, total suspendedmaximum weekly average≤ 45 mg/Lall year001
Solids, total suspendedmonthly average≤ 166.5 lb/dall year001
Solids, total suspendedmaximum weekly average≤ 249.7 lb/dall year001
Nitrogen, ammonia total [as N]monthly average≤ 10.2 mg/Lall year001
Nitrogen, ammonia total [as N]maximum weekly average≤ 15.3 mg/Lall year001
Nitrogen, ammonia total [as N]monthly average≤ 56.6 lb/dall year001
Nitrogen, ammonia total [as N]maximum weekly average≤ 84.9 lb/dall year001
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 acuteJul001
Toxicity [acute], Ceriodaphnia dubiamaximum≤ 1 tox acuteJun001
Toxicity [chronic], Ceriodaphnia dubiamaximum≤ 1 tox chronicJul001
Toxicity [acute], Pimephales promelas [Fathead Minnow]maximum≤ 1 tox acuteJun001
BOD, carbonaceous [5 day, 20 C]monthly average≤ 25 mg/Lall year001
BOD, carbonaceous [5 day, 20 C]maximum weekly average≤ 40 mg/Lall year001
BOD, carbonaceous [5 day, 20 C]monthly average≤ 138.7 lb/dall year001
BOD, carbonaceous [5 day, 20 C]maximum weekly average≤ 222 lb/dall year001
Flow, totalmonthly totalreport only (Mgal/mo)all year001
TU Static 48Hr Acute Daphnia magnamaximum≤ 1 tox acuteJun001
TU Static 48Hr Acute Daphnia magnamaximum≤ 1 tox acuteJul001
TU Static 48Hr Acute Daphnia pulexmaximum≤ 1 tox acuteJun001
TU Static 48Hr Acute Daphnia pulexdaily maximum≤ 1 tox acuteJul001
Durationmonthly totalreport only (hr/mo)all year003
Overflow volume [SS0 volume, CSO volume]monthly totalreport only (Mgal)all year003
Precipitation, monthly accumulationmonthly totalreport only (in/mo)all year003
Discharge event observation [Visual Monitoring]monthly totalreport only (#/mo)all year003
Copper, 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
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
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

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/IN0020222 · MCP: https://passage-data.com/mcp