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Oakland City WWTP

Sewage treatment plant, major discharger, Oakland City, Indiana. NPDES permit IN0021687, in force until Feb 28, 2030. Last 12 months: over a limit 2 times (last June 2026), 4 required values missing, 3 of 12 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: form A monthly (23 values)
Last report on file
September 2026
Oct 2024 – Sep 2025
1 value over a limit, 2 required values missing, 2 of 12 reports late

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

Period endingParameterReportedLimitOver by
June 2026Nitrogen, ammonia total [as N], monthly average1.34 mg/L≤ 1.21 mg/L11%
June 2026Nitrogen, ammonia total [as N], maximum weekly average2.32 mg/L≤ 1.82 mg/L27%

Limits in force (40)

ParameterStatisticLimitMonths
Oxygen, dissolved [DO]daily average minimum≥ 6 mg/LMay–Nov
Oxygen, dissolved [DO]daily average minimum≥ 5 mg/LJan, Feb, Mar, Apr, Dec
pHdaily minimum≥ 6 SUall year
pHdaily maximum≤ 9 SUall year
Solids, total suspendedmonthly average≤ 30 mg/LJan, Feb, Mar, Apr, Dec
Solids, total suspendedmonthly average≤ 18 mg/LMay–Nov
Solids, total suspendedmaximum weekly average≤ 45 mg/LJan, Feb, Mar, Apr, Dec
Solids, total suspendedmaximum weekly average≤ 27 mg/LMay–Nov
Solids, total suspendedmonthly average≤ 250 lb/dJan, Feb, Mar, Apr, Dec
Solids, total suspendedmonthly average≤ 150 lb/dMay–Nov
Solids, total suspendedmaximum weekly average≤ 376 lb/dJan, Feb, Mar, Apr, Dec
Solids, total suspendedmaximum weekly average≤ 225 lb/dMay–Nov
Nitrogen, total [as N]monthly averagereport only (mg/L)all year
Nitrogen, total [as N]monthly averagereport only (lb/d)all year
Nitrogen, ammonia total [as N]monthly average≤ 1.21 mg/LMay–Nov
Nitrogen, ammonia total [as N]monthly average≤ 1.85 mg/LJan, Feb, Mar, Apr, Dec
Nitrogen, ammonia total [as N]maximum weekly average≤ 1.82 mg/LMay–Nov
Nitrogen, ammonia total [as N]maximum weekly average≤ 2.78 mg/LJan, Feb, Mar, Apr, Dec
Nitrogen, ammonia total [as N]monthly average≤ 10.1 lb/dMay–Nov
Nitrogen, ammonia total [as N]monthly average≤ 15.4 lb/dJan, Feb, Mar, Apr, Dec
Nitrogen, ammonia total [as N]maximum weekly average≤ 15.2 lb/dMay–Nov
Nitrogen, ammonia total [as N]maximum weekly average≤ 23.2 lb/dJan, Feb, Mar, Apr, Dec
Phosphorus, total [as P]monthly average≤ 1 mg/Lall year
Phosphorus, total [as P]monthly averagereport only (lb/d)all year
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year
E. coli, colony forming units [CFU]monthly geometric mean≤ 125 CFU/100mLApr–Oct
E. coli, colony forming units [CFU]daily maximum≤ 235 CFU/100mLApr–Oct
Toxicity [acute], Ceriodaphnia dubiamaximum≤ 1 tox acuteAug
Toxicity [chronic], Ceriodaphnia dubiamaximum≤ 1 tox chronicAug
Toxicity [acute], Pimephales promelas [Fathead Minnow]maximum≤ 1 tox acuteAug
Toxicity [chronic], Pimephales promelas [Fathead Minnow]maximum≤ 1 tox chronicAug
BOD, carbonaceous [5 day, 20 C]monthly average≤ 25 mg/LJan, Feb, Mar, Apr, Dec
BOD, carbonaceous [5 day, 20 C]monthly average≤ 15 mg/LMay–Nov
BOD, carbonaceous [5 day, 20 C]maximum weekly average≤ 40 mg/LJan, Feb, Mar, Apr, Dec
BOD, carbonaceous [5 day, 20 C]maximum weekly average≤ 22.5 mg/LMay–Nov
BOD, carbonaceous [5 day, 20 C]monthly average≤ 209 lb/dJan, Feb, Mar, Apr, Dec
BOD, carbonaceous [5 day, 20 C]monthly average≤ 125 lb/dMay–Nov
BOD, carbonaceous [5 day, 20 C]maximum weekly average≤ 334 lb/dJan, Feb, Mar, Apr, Dec
BOD, carbonaceous [5 day, 20 C]maximum weekly average≤ 188 lb/dMay–Nov
Flow, totalmonthly totalreport only (Mgal/mo)all year

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/IN0021687 · MCP: https://passage-data.com/mcp