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Unadilla WWTF

Sewage treatment plant, Unadilla, Nebraska. NPDES permit NE0025461, in force until Dec 31, 2029. Last 12 months: over a limit 8 times (last April 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: outfall 001 form M quarterly (26 values), outfall INF form Q quarterly (1 value), outfall INF form A yearly
Last report on file
June 2026
Oct 2024 – Sep 2025
2 values over a limit, 0 required values missing, 1 of 16 reports late

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

Period endingParameterReportedLimitOver by
November 2025BOD, 5-day, 20 deg. C, monthly average59.3 mg/L≤ 30 mg/L98%
November 2025BOD, 5-day, 20 deg. C, weekly average59.3 mg/L≤ 45 mg/L32%
November 2025Solids, total suspended, daily maximum164.9 mg/L≤ 120 mg/L37%
November 2025Solids, total suspended, monthly average128.3 mg/L≤ 80 mg/L60%
April 2026BOD, 5-day, 20 deg. C, monthly average70.8 mg/L≤ 30 mg/L136%
April 2026BOD, 5-day, 20 deg. C, weekly average47.5 mg/L≤ 45 mg/L6%
April 2026Solids, total suspended, daily maximum168 mg/L≤ 120 mg/L40%
April 2026Solids, total suspended, monthly average180.77 mg/L≤ 80 mg/L126%

Limits in force (40)

ParameterStatisticLimitMonthsOutfall
Temperature, water deg. fahrenheitmonthly averagereport only (deg F)all year001
Temperature, water deg. fahrenheitdaily maximumreport only (deg F)all year001
BOD, 5-day, 20 deg. Cmonthly average≤ 30 mg/Lall year001
BOD, 5-day, 20 deg. Cweekly average≤ 45 mg/Lall year001
BOD, 5-day, 20 deg. Cmonthly averagereport only (kg/d)all year001
BOD, 5-day, 20 deg. Cweekly averagereport only (kg/d)all year001
pHdaily minimum≥ 6.5 SUall year001
pHdaily maximumreport only (SU)all year001
Solids, total suspendedmonthly average≤ 80 mg/Lall year001
Solids, total suspendeddaily maximum≤ 120 mg/Lall year001
Solids, total suspendedmonthly averagereport only (kg/d)all year001
Solids, total suspendeddaily maximumreport only (kg/d)all year001
Nitrogen, total [as N]monthly averagereport only (mg/L)all year001
Nitrogen, total [as N]daily maximumreport only (mg/L)all year001
Nitrogen, ammonia total [as N]monthly average≤ 1 mg/LJan, Feb, Nov, Dec001
Nitrogen, ammonia total [as N]monthly average≤ .29 mg/LMar–May001
Nitrogen, ammonia total [as N]monthly average≤ .15 mg/LJun–Oct001
Nitrogen, ammonia total [as N]daily maximum≤ 2.01 mg/LJan, Feb, Nov, Dec001
Nitrogen, ammonia total [as N]daily maximum≤ .58 mg/LMar–May001
Nitrogen, ammonia total [as N]daily maximum≤ .3 mg/LJun–Oct001
Nitrogen, ammonia total [as N]monthly average≤ 1.4 kg/dJan, Feb, Nov, Dec001
Nitrogen, ammonia total [as N]monthly average≤ .4 kg/dMar–May001
Nitrogen, ammonia total [as N]monthly average≤ .21 kg/dJun–Oct001
Nitrogen, ammonia total [as N]daily maximum≤ 2.81 kg/dJan, Feb, Nov, Dec001
Nitrogen, ammonia total [as N]daily maximum≤ .81 kg/dMar–May001
Nitrogen, ammonia total [as N]daily maximum≤ .43 kg/dJun–Oct001
Phosphorus, total [as P]monthly averagereport only (mg/L)all year001
Phosphorus, total [as P]daily maximumreport only (mg/L)all year001
E. coli, MTEC-MFmonthly geometric mean≤ 126 #/100mLMay–Sep001
E. coli, MTEC-MFmonthly geometric meanreport only (#/100mL)Jan, Feb, Mar, Apr, Oct, Nov, Dec001
E. coli, MTEC-MFmaximum≤ 298 #/100mLMay–Sep001
E. coli, MTEC-MFdaily maximumreport only (#/100mL)Jan, Feb, Mar, Apr, Oct, Nov, Dec001
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year001
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year001
Duration of dischargevaluereport only (d)all year001
Flow, totalvaluereport only (Mgal/mo)all year001
BOD, 5-day, 20 deg. Cvaluereport only (mg/L)all yearINF
pHvaluereport only (SU)all yearINF
Solids, total suspendedvaluereport only (mg/L)all yearINF
Flow, in conduit or thru treatment plantvaluereport only (MGD)all yearINF

How strict are these limits?

Cited limits by parameter: Nebraska'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/NE0025461 · MCP: https://passage-data.com/mcp