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Norfolk WWTF

Sewage treatment plant, major discharger, Norfolk, Nebraska. NPDES permit NE0033421, in force until Dec 31, 2028. Last 12 months: over a limit 3 times (last June 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: outfall 001 form M quarterly (24 values), outfall INF form Q quarterly (4 values), outfall 001 form A yearly
Last report on file
June 2026
Oct 2024 – Sep 2025
1 value over a limit, 0 required values missing, 0 of 17 reports late

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

Period endingParameterReportedLimitOver by
April 2026Solids, total suspended, monthly average31.96 mg/L≤ 30 mg/L7%
June 2026Solids, total suspended, monthly average32 mg/L≤ 30 mg/L7%
June 2026pH, daily minimum6.34 SU≥ 6.5 SU—

Limits in force (54)

ParameterStatisticLimitMonthsOutfall
Temperature, water deg. fahrenheitmonthly averagereport only (deg F)all year001
Temperature, water deg. fahrenheitdaily maximumreport only (deg F)all year001
pHdaily minimum≥ 6.5 SUall year001
pHdaily maximum≤ 9 SUall year001
Solids, total suspendedmonthly average≤ 30 mg/Lall year001
Solids, total suspended7-day average≤ 45 mg/Lall year001
Solids, total suspendedmonthly average≤ 652 kg/dall year001
Solids, total suspended7-day average≤ 978 kg/dall 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≤ 7.96 mg/LJan, Feb, Nov, Dec001
Nitrogen, ammonia total [as N]monthly average≤ 7.92 mg/LMar–May001
Nitrogen, ammonia total [as N]monthly average≤ 2.5 mg/LJun–Oct001
Nitrogen, ammonia total [as N]daily maximum≤ 23.13 mg/LJan, Feb, Nov, Dec001
Nitrogen, ammonia total [as N]daily maximum≤ 22.44 mg/LMar–May001
Nitrogen, ammonia total [as N]daily maximum≤ 7.03 mg/LJun–Oct001
Nitrogen, ammonia total [as N]monthly average≤ 83.64 kg/dJan, Feb, Nov, Dec001
Nitrogen, ammonia total [as N]monthly average≤ 84.74 kg/dMar–May001
Nitrogen, ammonia total [as N]monthly average≤ 27.89 kg/dJun–Oct001
Nitrogen, ammonia total [as N]daily maximum≤ 242.95 kg/dJan, Feb, Nov, Dec001
Nitrogen, ammonia total [as N]daily maximum≤ 239.95 kg/dMar–May001
Nitrogen, ammonia total [as N]daily maximum≤ 78.49 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
Cadmium, dissolved [as Cd]valuereport only (mg/L)all year001
Chromium, dissolved [as Cr]valuereport only (mg/L)all year001
Copper, dissolved [as Cu]valuereport only (mg/L)all year001
Lead, dissolved [as Pb]valuereport only (mg/L)all year001
Nickel, dissolved [as Ni]valuereport only (mg/L)all year001
Zinc, dissolved [as Zn]valuereport only (mg/L)all year001
E. coli, MTEC-MFmonthly geometric mean≤ 126 #/100mLall year001
E. coli, MTEC-MFdaily maximum≤ 298 #/100mLall 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
Toxicity [acute], Ceriodaphnia dubiamonthly averagereport only (tox acute)Jun–Oct001
Toxicity [acute], Ceriodaphnia dubiamonthly averagereport only (tox acute)Jan, Feb, Nov, Dec001
Toxicity [acute], Ceriodaphnia dubiamonthly averagereport only (tox acute)Mar–May001
Toxicity [acute], Ceriodaphnia dubiadaily maximum≤ 1 tox acuteJun–Oct001
Toxicity [acute], Ceriodaphnia dubiadaily maximum≤ 1 tox acuteJan, Feb, Nov, Dec001
Toxicity [acute], Ceriodaphnia dubiadaily maximum≤ 1.22 tox acuteMar–May001
Toxicity [acute], Pimephales promelas [Fathead Minnow]monthly averagereport only (tox acute)Mar–May001
Toxicity [acute], Pimephales promelas [Fathead Minnow]monthly averagereport only (tox acute)Jun–Oct001
Toxicity [acute], Pimephales promelas [Fathead Minnow]monthly averagereport only (tox acute)Jan, Feb, Nov, Dec001
Toxicity [acute], Pimephales promelas [Fathead Minnow]daily maximum≤ 1.22 tox acuteMar–May001
Toxicity [acute], Pimephales promelas [Fathead Minnow]daily maximum≤ 1 tox acuteJun–Oct001
Toxicity [acute], Pimephales promelas [Fathead Minnow]daily maximum≤ 1 tox acuteJan, Feb, Nov, Dec001
BOD, carbonaceous [5 day, 20 C]monthly average≤ 25 mg/Lall year001
BOD, carbonaceous [5 day, 20 C]7-day average≤ 40 mg/Lall year001
BOD, carbonaceous [5 day, 20 C]monthly average≤ 543 kg/dall year001
BOD, carbonaceous [5 day, 20 C]7-day average≤ 869 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.

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/NE0033421 · MCP: https://passage-data.com/mcp