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Oppd North Omaha Station

Electric Services, major discharger, Omaha, Nebraska. NPDES permit NE0000621, in force until Mar 31, 2028. Last 12 months: over a limit 2 times (last December 2025). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: outfall 001 form M quarterly (8 values), outfall 008 form M quarterly (15 values), outfall C01 form M quarterly (2 values), outfall CL1 form Q quarterly (17 values), outfall D01 form M quarterly (8 values), outfall N01 form M quarterly (6 values), and 12 more forms
Renewal application due
Oct 3, 2027 · 180 days before expiry; your permit may set another date
Last report on file
June 2026
Oct 2024 – Sep 2025
2 values over a limit, 0 required values missing, 0 of 128 reports late

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

Period endingParameterReportedLimitOver by
December 2025Iron, total [as Fe], daily maximum2.96 mg/L≤ 1 mg/L196%
December 2025Iron, total [as Fe], monthly average2.96 mg/L≤ 1 mg/L196%

Limits in force (158)

ParameterStatisticLimitMonthsOutfall
Temperature, water deg. fahrenheitmonthly averagereport only (deg F)all year001
Temperature, water deg. fahrenheitdaily maximum≤ 104.1 deg Fall year001
pHdaily minimum≥ 6.5 SUall year001
pHdaily maximum≤ 9 SUall 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
Chlorine, total residualmonthly average≤ .011 mg/Lall year001
Chlorine, total residualdaily maximum≤ .02 mg/Lall year001
pHdaily minimum≥ 6.5 SUall year008
pHdaily maximum≤ 9 SUall year008
Solids, total suspendedmonthly average≤ 30 mg/Lall year008
Solids, total suspendeddaily maximum≤ 100 mg/Lall year008
Oil and grease, hexane extr methodmonthly averagereport only (mg/L)all year008
Oil and grease, hexane extr methoddaily maximum≤ 10 mg/Lall year008
Sulfate, total [as SO4]monthly averagereport only (mg/L)all year008
Sulfate, total [as SO4]daily maximumreport only (mg/L)all year008
Arsenic, dissolved [as As]monthly averagereport only (mg/L)all year008
Arsenic, dissolved [as As]daily maximumreport only (mg/L)all year008
Cadmium, dissolved [as Cd]monthly averagereport only (mg/L)all year008
Cadmium, dissolved [as Cd]daily maximumreport only (mg/L)all year008
Chromium, dissolved [as Cr]monthly averagereport only (mg/L)all year008
Chromium, dissolved [as Cr]daily maximumreport only (mg/L)all year008
Copper, dissolved [as Cu]monthly averagereport only (mg/L)all year008
Copper, dissolved [as Cu]daily maximumreport only (mg/L)all year008
Copper, total [as Cu]monthly average≤ 1 mg/Lall year008
Copper, total [as Cu]daily maximum≤ 1 mg/Lall year008
Iron, total [as Fe]monthly average≤ 1 mg/Lall year008
Iron, total [as Fe]daily maximum≤ 1 mg/Lall year008
Lead, dissolved [as Pb]monthly averagereport only (mg/L)all year008
Lead, dissolved [as Pb]daily maximumreport only (mg/L)all year008
Nickel, dissolved [as Ni]monthly averagereport only (mg/L)all year008
Nickel, dissolved [as Ni]daily maximumreport only (mg/L)all year008
Zinc, dissolved [as Zn]monthly averagereport only (mg/L)all year008
Zinc, dissolved [as Zn]daily maximumreport only (mg/L)all year008
Selenium, dissolved [as Se]monthly averagereport only (mg/L)all year008
Selenium, dissolved [as Se]daily maximumreport only (mg/L)all year008
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year008
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year008
Toxicity [acute], Ceriodaphnia dubiavaluereport only (toxic)all year008
Toxicity [acute], Pimephales promelas [Fathead Minnow]valuereport only (toxic)all year008
Mercury, dissolved [as Hg]monthly averagereport only (mg/L)all year008
Mercury, dissolved [as Hg]daily maximumreport only (mg/L)all year008
Duration of dischargevaluereport only (d)all year008
Duration of dischargevaluereport only (d)all yearC01
Flow, totalvaluereport only (gal/mo)all yearC01
pHdaily minimum≥ 6.5 SUall yearCL1
pHdaily maximum≤ 9 SUall yearCL1
Solids, total suspendedmonthly average≤ 30 mg/Lall yearCL1
Solids, total suspendeddaily maximum≤ 100 mg/Lall yearCL1
Oil and grease, hexane extr methodmonthly average≤ 15 mg/Lall yearCL1
Oil and grease, hexane extr methoddaily maximum≤ 20 mg/Lall yearCL1
Sulfate, total [as SO4]monthly averagereport only (mg/L)all yearCL1
Sulfate, total [as SO4]daily maximumreport only (mg/L)all yearCL1
Arsenic, dissolved [as As]monthly averagereport only (mg/L)all yearCL1
Arsenic, dissolved [as As]daily maximumreport only (mg/L)all yearCL1
Copper, total [as Cu]monthly average≤ 1 mg/Lall yearCL1
Copper, total [as Cu]daily maximum≤ 1 mg/Lall yearCL1
Iron, total [as Fe]monthly average≤ 1 mg/Lall yearCL1
Iron, total [as Fe]daily maximum≤ 1 mg/Lall yearCL1
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all yearCL1
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all yearCL1
Duration of dischargevaluereport only (d)all yearCL1
pHdaily minimum≥ 6.5 SUall yearD01
pHdaily maximum≤ 9 SUall yearD01
Solids, total suspendedmonthly averagereport only (mg/L)all yearD01
Solids, total suspendeddaily maximumreport only (mg/L)all yearD01
Sulfate, total [as SO4]monthly averagereport only (mg/L)all yearD01
Sulfate, total [as SO4]daily maximumreport only (mg/L)all yearD01
Arsenic, dissolved [as As]monthly averagereport only (mg/L)all yearD01
Arsenic, dissolved [as As]daily maximumreport only (mg/L)all yearD01
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all yearD01
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all yearD01
Toxicity [acute], Ceriodaphnia dubiavaluereport only (tox acute)all yearD01
Toxicity [acute], Pimephales promelas [Fathead Minnow]valuereport only (tox acute)all yearD01
Solids, total suspendedmonthly averagereport only (mg/L)all yearN01
Solids, total suspendeddaily maximumreport only (mg/L)all yearN01
Oil and grease, hexane extr methodmonthly averagereport only (mg/L)all yearN01
Oil and grease, hexane extr methoddaily maximumreport only (mg/L)all yearN01
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all yearN01
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all yearN01
pHdaily minimum≥ 6.5 SUall yearPW1
pHdaily maximum≤ 9 SUall yearPW1
Solids, total suspendedmonthly average≤ 30 mg/Lall yearPW1
Solids, total suspendeddaily maximum≤ 100 mg/Lall yearPW1
Oil and grease, hexane extr methodmonthly averagereport only (mg/L)all yearPW1
Oil and grease, hexane extr methoddaily maximum≤ 10 mg/Lall yearPW1
Sulfate, total [as SO4]monthly averagereport only (mg/L)all yearPW1
Sulfate, total [as SO4]daily maximumreport only (mg/L)all yearPW1
Arsenic, total [as As]monthly averagereport only (mg/L)all yearPW1
Arsenic, total [as As]daily maximumreport only (mg/L)all yearPW1
Cadmium, dissolved [as Cd]monthly averagereport only (mg/L)all yearPW1
Cadmium, dissolved [as Cd]daily maximumreport only (mg/L)all yearPW1
Chromium, dissolved [as Cr]monthly averagereport only (mg/L)all yearPW1
Chromium, dissolved [as Cr]daily maximumreport only (mg/L)all yearPW1
Copper, dissolved [as Cu]monthly averagereport only (mg/L)all yearPW1
Copper, dissolved [as Cu]daily maximumreport only (mg/L)all yearPW1
Lead, dissolved [as Pb]monthly averagereport only (mg/L)all yearPW1
Lead, dissolved [as Pb]daily maximumreport only (mg/L)all yearPW1
Nickel, dissolved [as Ni]monthly averagereport only (mg/L)all yearPW1
Nickel, dissolved [as Ni]daily maximumreport only (mg/L)all yearPW1
Zinc, dissolved [as Zn]monthly averagereport only (mg/L)all yearPW1
Zinc, dissolved [as Zn]daily maximumreport only (mg/L)all yearPW1
Selenium, dissolved [as Se]monthly averagereport only (mg/L)all yearPW1
Selenium, dissolved [as Se]daily maximumreport only (mg/L)all yearPW1
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all yearPW1
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all yearPW1
Toxicity [acute], Ceriodaphnia dubiavaluereport only (tox acute)all yearPW1
Toxicity [acute], Pimephales promelas [Fathead Minnow]valuereport only (tox acute)all yearPW1
Mercury, total [as Hg]monthly averagereport only (ug/L)all yearPW1
Mercury, total [as Hg]daily maximumreport only (ug/L)all yearPW1
pHdaily minimum≥ 6.5 SUall yearRO1
pHdaily maximum≤ 9 SUall yearRO1
Solids, total suspendedmonthly average≤ 30 mg/Lall yearRO1
Solids, total suspendeddaily maximum≤ 100 mg/Lall yearRO1
Oil and grease, hexane extr methodmonthly average≤ 15 mg/Lall yearRO1
Oil and grease, hexane extr methoddaily maximum≤ 20 mg/Lall yearRO1
Sulfate, total [as SO4]monthly averagereport only (mg/L)all yearRO1
Sulfate, total [as SO4]daily maximumreport only (mg/L)all yearRO1
Arsenic, dissolved [as As]monthly averagereport only (mg/L)all yearRO1
Arsenic, dissolved [as As]daily maximumreport only (mg/L)all yearRO1
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all yearRO1
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all yearRO1
pHdaily minimum≥ 6.5 SUall yearS01
pHdaily maximum≤ 9 SUall yearS01
Solids, total suspendedmonthly average≤ 30 mg/Lall yearS01
Solids, total suspendeddaily maximum≤ 100 mg/Lall yearS01
Oil and grease, hexane extr methodmonthly average≤ 15 mg/Lall yearS01
Oil and grease, hexane extr methoddaily maximum≤ 20 mg/Lall yearS01
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all yearS01
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all yearS01
pHdaily minimum≥ 6.5 SUall yearS02
pHdaily maximum≤ 9 SUall yearS02
Solids, total suspendedmonthly average≤ 30 mg/Lall yearS02
Solids, total suspendeddaily maximum≤ 100 mg/Lall yearS02
Oil and grease, hexane extr methodmonthly average≤ 15 mg/Lall yearS02
Oil and grease, hexane extr methoddaily maximum≤ 20 mg/Lall yearS02
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all yearS02
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all yearS02
pHdaily minimum≥ 6.5 SUall yearS03
pHdaily maximum≤ 9 SUall yearS03
Solids, total suspendedmonthly average≤ 30 mg/Lall yearS03
Solids, total suspendeddaily maximum≤ 100 mg/Lall yearS03
Oil and grease, hexane extr methodmonthly average≤ 15 mg/Lall yearS03
Oil and grease, hexane extr methoddaily maximum≤ 20 mg/Lall yearS03
Flow, in conduit or thru treatment plant30-day averagereport only (MGD)all yearS03
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all yearS03
pHdaily minimum≥ 6.5 SUall yearSW1
pHdaily maximum≤ 9 SUall yearSW1
Solids, total suspendedmonthly average≤ 30 mg/Lall yearSW1
Solids, total suspendeddaily maximum≤ 100 mg/Lall yearSW1
Oil and grease, hexane extr methodmonthly average≤ 15 mg/Lall yearSW1
Oil and grease, hexane extr methoddaily maximum≤ 20 mg/Lall yearSW1
Sulfate, total [as SO4]monthly averagereport only (mg/L)all yearSW1
Sulfate, total [as SO4]daily maximumreport only (mg/L)all yearSW1
Arsenic, dissolved [as As]monthly averagereport only (mg/L)all yearSW1
Arsenic, dissolved [as As]daily maximumreport only (mg/L)all yearSW1
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all yearSW1
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all yearSW1

How strict are these limits?

Cited limits by parameter: Nebraska's rules and the federal ones.

Same industry: the 21 Electric Services permits in Nebraska.

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/NE0000621 · MCP: https://passage-data.com/mcp