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Waterloo WWTP

Sewage treatment plant, Waterloo, Indiana. NPDES permit IN0020711, in force until Feb 28, 2027. Last 12 months: over a limit 8 times (last July 2026), 2 required values missing, 2 of 24 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: outfall 001 form A monthly (25 values), outfall 101 form C monthly (4 values)
Renewal application due
Sep 1, 2026 · 180 days before expiry; your permit may set another date
Last report on file
September 2026
Oct 2024 – Sep 2025
6 values over a limit, 0 required values missing, 0 of 24 reports late

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

Period endingParameterReportedLimitOver by
April 2026E. coli, colony forming units [CFU], daily maximum2420 CFU/100mL≤ 235 CFU/100mL930%
April 2026Nitrogen, ammonia total [as N], daily maximum18.93 lb/d≤ 17.27 lb/d10%
April 2026Nitrogen, ammonia total [as N], daily maximum18.93 lb/d≤ 17.27 lb/d10%
April 2026Solids, total suspended, maximum weekly average145.2 lb/d≤ 138.6 lb/d5%
July 2026E. coli, colony forming units [CFU], daily maximum1986 CFU/100mL≤ 235 CFU/100mL745%
July 2026Nitrogen, ammonia total [as N], daily maximum24.3 mg/L≤ 5.49 mg/L343%
July 2026Nitrogen, ammonia total [as N], daily maximum29.99 lb/d≤ 16.91 lb/d77%
July 2026Nitrogen, ammonia total [as N], monthly average2.975 mg/L≤ 2.36 mg/L26%

Limits in force (41)

ParameterStatisticLimitMonthsOutfall
Oxygen, dissolved [DO]daily average minimum≥ 5 mg/Lall year001
pHdaily minimum≥ 6 SUall year001
pHdaily maximum≤ 9 SUall year001
Solids, total suspendedmonthly average≤ 30 mg/LJan, Feb, Mar, Apr, Dec001
Solids, total suspendedmonthly average≤ 18 mg/LMay–Nov001
Solids, total suspendedmaximum weekly average≤ 45 mg/LJan, Feb, Mar, Apr, Dec001
Solids, total suspendedmaximum weekly average≤ 27 mg/LMay–Nov001
Solids, total suspendedmonthly average≤ 92.4 lb/dJan, Feb, Mar, Apr, Dec001
Solids, total suspendedmonthly average≤ 55.4 lb/dMay–Nov001
Solids, total suspendedmaximum weekly average≤ 138.6 lb/dJan, Feb, Mar, Apr, Dec001
Solids, total suspendedmaximum weekly average≤ 83.1 lb/dMay–Nov001
Nitrogen, ammonia total [as N]monthly average≤ 2.36 mg/LMay–Nov001
Nitrogen, ammonia total [as N]monthly average≤ 2.41 mg/LJan, Feb, Mar, Apr, Dec001
Nitrogen, ammonia total [as N]daily maximum≤ 5.49 mg/LMay–Nov001
Nitrogen, ammonia total [as N]daily maximum≤ 5.61 mg/LJan, Feb, Mar, Apr, Dec001
Nitrogen, ammonia total [as N]monthly average≤ 7.27 lb/dMay–Nov001
Nitrogen, ammonia total [as N]monthly average≤ 7.42 lb/dJan, Feb, Mar, Apr, Dec001
Nitrogen, ammonia total [as N]daily maximum≤ 16.91 lb/dMay–Nov001
Nitrogen, ammonia total [as N]daily maximum≤ 17.27 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
E. coli, colony forming units [CFU]daily maximumreport only (CFU/100mL)Apr–Oct001
Number of Eventsmonthly totalreport only (# exceed)Apr–Oct001
Number of Eventsmonthly totalreport only (#)Apr–Oct001
BOD, carbonaceous [5 day, 20 C]monthly average≤ 25 mg/LJan, Feb, Mar, Apr, Dec001
BOD, carbonaceous [5 day, 20 C]monthly average≤ 15 mg/LMay–Nov001
BOD, carbonaceous [5 day, 20 C]maximum weekly average≤ 40 mg/LJan, Feb, Mar, Apr, Dec001
BOD, carbonaceous [5 day, 20 C]maximum weekly average≤ 23 mg/LMay–Nov001
BOD, carbonaceous [5 day, 20 C]monthly average≤ 77 lb/dJan, Feb, Mar, Apr, Dec001
BOD, carbonaceous [5 day, 20 C]monthly average≤ 46.2 lb/dMay–Nov001
BOD, carbonaceous [5 day, 20 C]maximum weekly average≤ 123.2 lb/dJan, Feb, Mar, Apr, Dec001
BOD, carbonaceous [5 day, 20 C]maximum weekly average≤ 70.8 lb/dMay–Nov001
Phosphorus, total percent removalmonthly average minimum≥ 75 %all year001
Flow, totalmonthly totalreport only (Mgal/mo)all year001
Durationmonthly totalreport only (hr/mo)all year101
Overflow volume [SS0 volume, CSO volume]monthly totalreport only (Mgal)all year101
Precipitation, monthly accumulationmonthly totalreport only (in/mo)all year101
Discharge event observation [Visual Monitoring]monthly totalreport only (#/mo)all year101

How strict are these limits?

Cited limits by parameter: Indiana's rules and the federal ones.

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/IN0020711 · MCP: https://passage-data.com/mcp