NPPD Gerald Gentleman Station — NPDES permit NE0111546: limits, due date and EPA's record

Electric Services, major discharger, Sutherland, Nebraska. NPDES permit NE0111546, in force until Mar 31, 2027. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.

Limits in force (81)

Parameter	Statistic	Limit	Months	Outfall
Temperature, water deg. fahrenheit	monthly average	report only (deg F)	all year	001
Temperature, water deg. fahrenheit	maximum	≤ 94 deg F	all year	001
pH	daily minimum	≥ 6.5 SU	all year	001
pH	daily maximum	≤ 9 SU	all year	001
Oil and grease, hexane extr method	monthly average	report only (mg/L)	all year	001
Oil and grease, hexane extr method	daily maximum	≤ 10 mg/L	all year	001
Phosphorus, total [as P]	value	report only (mg/L)	all year	001
Flow, in conduit or thru treatment plant	monthly average	report only (MGD)	all year	001
Flow, in conduit or thru treatment plant	daily maximum	report only (MGD)	all year	001
Chlorine, total residual	monthly average	≤ .011 mg/L	all year	001
Chlorine, total residual	daily maximum	≤ .019 mg/L	all year	001
Toxicity [acute], Ceriodaphnia dubia	value	≤ 1 tox acute	all year	001
Toxicity [acute], Pimephales promelas [Fathead Minnow]	value	≤ 1 tox acute	all year	001
Conductivity	monthly average	≤ 2000 umho/cm	all year	002
Conductivity	daily maximum	report only (umho/cm)	all year	002
pH	daily minimum	≥ 6.5 SU	all year	002
pH	daily maximum	≤ 9 SU	all year	002
Solids, total suspended	monthly average	≤ 30 mg/L	all year	002
Solids, total suspended	daily maximum	≤ 100 mg/L	all year	002
Oil and grease, hexane extr method	monthly average	report only (mg/L)	all year	002
Oil and grease, hexane extr method	daily maximum	≤ 10 mg/L	all year	002
Chloride [as Cl]	monthly average	≤ 230 mg/L	all year	002
Chloride [as Cl]	daily maximum	≤ 860 mg/L	all year	002
Arsenic, dissolved [as As]	value	report only (mg/L)	all year	002
Cadmium, dissolved [as Cd]	value	report only (mg/L)	all year	002
Chromium, dissolved [as Cr]	value	report only (mg/L)	all year	002
Copper, dissolved [as Cu]	value	report only (mg/L)	all year	002
Copper, total [as Cu]	monthly average	≤ .009 mg/L	all year	002
Copper, total [as Cu]	daily maximum	≤ .013 mg/L	all year	002
Copper, total [as Cu]	monthly average	≤ .034 kg/d	all year	002
Copper, total [as Cu]	daily maximum	≤ .049 kg/d	all year	002
Iron, total [as Fe]	monthly average	≤ 1 mg/L	all year	002
Iron, total [as Fe]	daily maximum	≤ 1 mg/L	all year	002
Iron, total [as Fe]	monthly average	≤ 3.785 kg/d	all year	002
Iron, total [as Fe]	daily maximum	≤ 3.785 kg/d	all year	002
Lead, dissolved [as Pb]	value	report only (mg/L)	all year	002
Nickel, dissolved [as Ni]	value	report only (mg/L)	all year	002
Zinc, dissolved [as Zn]	value	report only (mg/L)	all year	002
Selenium, dissolved [as Se]	value	report only (ug/L)	all year	002
PCB, total, scan effluent	value	report only (ug/L)	all year	002
E. coli, MTEC-MF	monthly geometric mean	≤ 126 #/100mL	May–Sep	002
E. coli, MTEC-MF	daily maximum	≤ 298 #/100mL	May–Sep	002
Flow, in conduit or thru treatment plant	monthly average	report only (MGD)	all year	002
Flow, in conduit or thru treatment plant	daily maximum	report only (MGD)	all year	002
Toxicity [acute], Ceriodaphnia dubia	value	≤ 1 tox acute	all year	002
Toxicity [acute], Pimephales promelas [Fathead Minnow]	value	≤ 1 tox acute	all year	002
Mercury, dissolved [as Hg]	value	report only (ug/L)	all year	002
BOD, carbonaceous [5 day, 20 C]	monthly average	≤ 25 mg/L	all year	002
BOD, carbonaceous [5 day, 20 C]	maximum	≤ 40 mg/L	all year	002
BOD, carbonaceous [5 day, 20 C]	monthly average	≤ 1.27 kg/d	all year	002
BOD, carbonaceous [5 day, 20 C]	maximum	≤ 2.04 kg/d	all year	002
Duration of discharge	monthly average	report only (d)	all year	002
Duration of discharge	daily maximum	report only (d)	all year	002
pH	daily minimum	≥ 6.5 SU	all year	003
pH	daily maximum	≤ 9 SU	all year	003
Solids, total suspended	monthly average	report only (mg/L)	all year	003
Solids, total suspended	daily maximum	report only (mg/L)	all year	003
Oil and grease, hexane extr method	monthly average	report only (mg/L)	all year	003
Oil and grease, hexane extr method	maximum	≤ 10 mg/L	all year	003
Selenium, dissolved [as Se]	value	report only (ug/L)	all year	003
Flow, in conduit or thru treatment plant	monthly average	report only (MGD)	all year	003
Flow, in conduit or thru treatment plant	maximum	report only (MGD)	all year	003
Mercury, dissolved [as Hg]	value	report only (ug/L)	all year	003
Duration of discharge	monthly average	report only (hr)	all year	003
Duration of discharge	maximum	report only (hr)	all year	003
pH	daily minimum	≥ 6 SU	all year	L01
pH	daily maximum	≤ 9 SU	all year	L01
Solids, total suspended	monthly average	≤ 30 mg/L	all year	L01
Solids, total suspended	daily maximum	≤ 100 mg/L	all year	L01
Oil and grease, hexane extr method	monthly average	≤ 15 mg/L	all year	L01
Oil and grease, hexane extr method	daily maximum	≤ 20 mg/L	all year	L01
Flow, in conduit or thru treatment plant	monthly average	report only (MGD)	all year	L01
Flow, in conduit or thru treatment plant	daily maximum	report only (MGD)	all year	L01
pH	daily minimum	≥ 6 SU	all year	L02
pH	daily maximum	≤ 9 SU	all year	L02
Solids, total suspended	monthly average	≤ 30 mg/L	all year	L02
Solids, total suspended	daily maximum	≤ 100 mg/L	all year	L02
Oil and grease, hexane extr method	monthly average	≤ 15 mg/L	all year	L02
Oil and grease, hexane extr method	daily maximum	≤ 20 mg/L	all year	L02
Flow, in conduit or thru treatment plant	monthly average	report only (MGD)	all year	L02
Flow, in conduit or thru treatment plant	daily maximum	report only (MGD)	all year	L02

How strict are these limits?

Your permit document is the final word. As JSON: /api/v1/permits/NE0111546 · MCP: https://passage-data.com/mcp