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Middletown WWTP

Sewage treatment plant, Middletown, Indiana. NPDES permit IN0020770, in force until Jun 30, 2028. Last 12 months: over a limit 24 times (last July 2026), 1 of 22 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: outfall 001 form A monthly (26 values), outfall 004 form C monthly (4 values)
Renewal application due
Jan 2, 2028 · 180 days before expiry; your permit may set another date
Last report on file
August 2026
Oct 2024 – Sep 2025
25 values over a limit, 0 required values missing, 0 of 31 reports late

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

All 24 values over a limit
Period endingParameterReportedLimitOver by
October 2025Nitrogen, ammonia total [as N], monthly average3.9759 mg/L≤ 2.5 mg/L59%
October 2025Nitrogen, ammonia total [as N], maximum weekly average6.9867 mg/L≤ 3.8 mg/L84%
November 2025Nitrogen, ammonia total [as N], monthly average2.501 mg/L≤ 2.5 mg/L0%
November 2025Nitrogen, ammonia total [as N], maximum weekly average4.4547 mg/L≤ 3.8 mg/L17%
December 2025Nitrogen, ammonia total [as N], maximum weekly average5.8367 mg/L≤ 5.1 mg/L14%
February 2026Phosphorus, total [as P], monthly average1.075 mg/L≤ 1 mg/L8%
March 2026Phosphorus, total [as P], monthly average1.0338 mg/L≤ 1 mg/L3%
April 2026E. coli, colony forming units [CFU], daily maximum629.4 CFU/100mL≤ 235 CFU/100mL168%
April 2026Solids, total suspended, monthly average36.4 mg/L≤ 30 mg/L21%
April 2026Solids, total suspended, maximum weekly average70.667 mg/L≤ 45 mg/L57%
May 2026E. coli, colony forming units [CFU], daily maximum2419.2 CFU/100mL≤ 235 CFU/100mL929%
May 2026E. coli, colony forming units [CFU], monthly geometric mean543.54 CFU/100mL≤ 125 CFU/100mL335%
May 2026Phosphorus, total [as P], monthly average1.4125 mg/L≤ 1 mg/L41%
May 2026Solids, total suspended, monthly average62.6 mg/L≤ 30 mg/L109%
May 2026Solids, total suspended, maximum weekly average108.33 mg/L≤ 45 mg/L141%
May 2026Solids, total suspended, maximum weekly average620.42 lb/d≤ 451 lb/d38%
June 2026BOD, carbonaceous [5 day, 20 C], maximum weekly average70.333 mg/L≤ 40 mg/L76%
June 2026Chlorine, total residual, daily maximum.52 mg/L< .06 mg/L767%
June 2026E. coli, colony forming units [CFU], daily maximum2419.6 CFU/100mL≤ 235 CFU/100mL930%
June 2026E. coli, colony forming units [CFU], monthly geometric mean159.33 CFU/100mL≤ 125 CFU/100mL27%
July 2026Chlorine, total residual, daily maximum1.51 mg/L< .06 mg/L2417%
July 2026Chlorine, total residual, monthly average.0826 mg/L< .06 mg/L38%
July 2026E. coli, colony forming units [CFU], daily maximum1119.9 CFU/100mL≤ 235 CFU/100mL377%
July 2026E. coli, colony forming units [CFU], monthly geometric mean230.73 CFU/100mL≤ 125 CFU/100mL85%

Limits in force (34)

ParameterStatisticLimitMonthsOutfall
Oxygen, dissolved [DO]daily average minimum≥ 4 mg/Lall year001
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≤ 300 lb/dall year001
Solids, total suspendedmaximum weekly average≤ 451 lb/dall year001
Nitrogen, ammonia total [as N]monthly average≤ 2.5 mg/LMay–Nov001
Nitrogen, ammonia total [as N]monthly average≤ 3.4 mg/LJan, Feb, Mar, Apr, Dec001
Nitrogen, ammonia total [as N]maximum weekly average≤ 3.8 mg/LMay–Nov001
Nitrogen, ammonia total [as N]maximum weekly average≤ 5.1 mg/LJan, Feb, Mar, Apr, Dec001
Nitrogen, ammonia total [as N]monthly average≤ 25 lb/dMay–Nov001
Nitrogen, ammonia total [as N]monthly average≤ 34 lb/dJan, Feb, Mar, Apr, Dec001
Nitrogen, ammonia total [as N]maximum weekly average≤ 38 lb/dMay–Nov001
Nitrogen, ammonia total [as N]maximum weekly average≤ 51 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
Chlorine, total residualdaily minimum≥ .5 mg/LApr–Oct001
Chlorine, total residualdaily maximumreport only (mg/L)Apr–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
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≤ 250 lb/dall year001
BOD, carbonaceous [5 day, 20 C]maximum weekly average≤ 401 lb/dall year001
Phosphorus, total percent removalmonthly average minimumreport only (%)all year001
Flow, totalmonthly totalreport only (Mgal/mo)all year001
Durationmonthly totalreport only (hr/mo)all year004
Overflow volume [SS0 volume, CSO volume]monthly totalreport only (Mgal)all year004
Precipitation, monthly accumulationmonthly totalreport only (in/mo)all year004
Discharge event observation [Visual Monitoring]monthly totalreport only (#/mo)all year004

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/IN0020770 · MCP: https://passage-data.com/mcp