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Gibbon WWTF

Sewage treatment plant, major discharger, Gibbon, Nebraska. NPDES permit NE0029297 expired Jun 30, 2024; its limits still apply. Last 12 months: over a limit 11 times (last June 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: outfall 001 form M quarterly (28 values), outfall 001 form Q quarterly (2 values), outfall INF form Q quarterly (4 values), outfall 001 form A yearly
Last report on file
June 2026
Oct 2024 – Sep 2025
79 values over a limit, 13 required values missing, 1 of 21 reports late

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

Period endingParameterReportedLimitOver by
March 2026Nitrogen, ammonia total [as N], daily maximum12.9 mg/L≤ 2.27 mg/L468%
March 2026Nitrogen, ammonia total [as N], daily maximum53.4 kg/d≤ 12.4 kg/d331%
March 2026Nitrogen, ammonia total [as N], monthly average11.17 kg/d≤ 6.18 kg/d81%
March 2026Nitrogen, ammonia total [as N], monthly average2.7 mg/L≤ 1.13 mg/L139%
May 2026Nitrogen, ammonia total [as N], daily maximum13.89 kg/d≤ 12.4 kg/d12%
May 2026Nitrogen, ammonia total [as N], daily maximum4.4 mg/L≤ 2.27 mg/L94%
May 2026Nitrogen, ammonia total [as N], monthly average1.38 mg/L≤ 1.13 mg/L22%
June 2026Nitrogen, ammonia total [as N], daily maximum113.01 kg/d≤ 9.29 kg/d1116%
June 2026Nitrogen, ammonia total [as N], daily maximum50.5 mg/L≤ 1.68 mg/L2906%
June 2026Nitrogen, ammonia total [as N], monthly average13.96 mg/L≤ .84 mg/L1562%
June 2026Nitrogen, ammonia total [as N], monthly average32.94 kg/d≤ 4.63 kg/d611%

Limits in force (51)

ParameterStatisticLimitMonthsOutfall
Temperature, water deg. fahrenheitmonthly averagereport only (deg F)all year001
Temperature, water deg. fahrenheitdaily maximumreport only (deg F)all year001
Conductivitymonthly averagereport only (umho/cm)all year001
Conductivitydaily maximumreport only (umho/cm)all year001
Oxygen, dissolved [DO]monthly averagereport only (mg/L)all year001
Oxygen, dissolved [DO]daily maximumreport only (mg/L)all year001
pHdaily minimum≥ 6.5 SUall year001
pHdaily maximum≤ 9 SUall year001
Solids, total suspendedmonthly average≤ 30 mg/Lall year001
Solids, total suspendedweekly average≤ 45 mg/Lall year001
Solids, total suspendedmonthly average≤ 227 kg/dall year001
Solids, total suspendedweekly average≤ 341 kg/dall year001
Oil and grease, hexane extr methodmonthly averagereport only (mg/L)all year001
Oil and grease, hexane extr methoddaily maximumreport only (mg/L)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≤ 1.13 mg/LMar–May001
Nitrogen, ammonia total [as N]monthly average≤ .84 mg/LJun–Oct001
Nitrogen, ammonia total [as N]monthly average≤ 1.91 mg/LJan, Feb, Nov, Dec001
Nitrogen, ammonia total [as N]daily maximum≤ 2.27 mg/LMar–May001
Nitrogen, ammonia total [as N]daily maximum≤ 1.68 mg/LJun–Oct001
Nitrogen, ammonia total [as N]daily maximum≤ 3.82 mg/LJan, Feb, Nov, Dec001
Nitrogen, ammonia total [as N]monthly average≤ 6.18 kg/dMar–May001
Nitrogen, ammonia total [as N]monthly average≤ 4.63 kg/dJun–Oct001
Nitrogen, ammonia total [as N]monthly average≤ 10.89 kg/dJan, Feb, Nov, Dec001
Nitrogen, ammonia total [as N]daily maximum≤ 12.4 kg/dMar–May001
Nitrogen, ammonia total [as N]daily maximum≤ 9.29 kg/dJun–Oct001
Nitrogen, ammonia total [as N]daily maximum≤ 21.85 kg/dJan, Feb, Nov, Dec001
Phosphorus, total [as P]monthly averagereport only (mg/L)all year001
Phosphorus, total [as P]daily maximumreport only (mg/L)all year001
Chloride [as Cl]monthly averagereport only (mg/L)all year001
Chloride [as Cl]daily maximumreport only (mg/L)all year001
Chloride [as Cl]monthly averagereport only (kg/d)all year001
Chloride [as Cl]daily maximumreport only (kg/d)all year001
E. coli, MTEC-MFmonthly geometric meanreport only (#/100mL)all year001
E. coli, MTEC-MFdaily maximumreport only (#/100mL)all year001
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year001
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year001
Priority pollutants scan [yes/no]valuereport only (N=0;Y=1)all year001
Toxicity [acute], Ceriodaphnia dubiamonthly averagereport only (tox acute)all year001
Toxicity [acute], Ceriodaphnia dubiadaily maximum≤ 1 tox acuteall year001
Toxicity [acute], Pimephales promelas [Fathead Minnow]monthly averagereport only (tox acute)all year001
Toxicity [acute], Pimephales promelas [Fathead Minnow]daily maximum≤ 1 tox acuteall year001
BOD, carbonaceous [5 day, 20 C]monthly average≤ 25 mg/Lall year001
BOD, carbonaceous [5 day, 20 C]weekly average≤ 40 mg/Lall year001
BOD, carbonaceous [5 day, 20 C]monthly average≤ 189 kg/dall year001
BOD, carbonaceous [5 day, 20 C]weekly average≤ 303 kg/dall year001
pHvaluereport only (SU)all yearINF
Solids, total suspendedvaluereport only (mg/L)all yearINF
Flow, in conduit or thru treatment plantvaluereport only (MGD)all yearINF
BOD, carbonaceous [5 day, 20 C]valuereport only (mg/L)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/NE0029297 · MCP: https://passage-data.com/mcp