R.E. Ginna Nuclear PWR PLT LLC — NPDES permit NY0000493: limits, due date and EPA's record

Electric Services, major discharger, Ontario, Town Of, New York. NPDES permit NY0000493 expired Dec 31, 2019; its limits still apply. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.

Limits in force (127)

Parameter	Statistic	Limit	Months	Outfall
Temperature, water deg. fahrenheit	monthly average	report only (deg F)	all year	001
Temperature, water deg. fahrenheit	daily maximum	report only (deg F)	all year	001
Temperature, water deg. fahrenheit	monthly average	report only (deg F)	all year	001
Temperature, water deg. fahrenheit	daily maximum	≤ 106 deg F	all year	001
pH	minimum	≥ 6 SU	all year	001
pH	maximum	≤ 9 SU	all year	001
Boron, total [as B]	daily maximum	report only (mg/L)	all year	001
Copper, total [as Cu]	daily maximum	report only (mg/kg) (alert, not enforceable)	all year	001
Copper, total [as Cu]	daily maximum	report only (mg/L)	all year	001
Copper, total [as Cu]	daily maximum	report only (mg/L) (alert, not enforceable)	all year	001
Copper, total [as Cu]	daily maximum	≤ .018 mg/L (alert, not enforceable)	all year	001
Iron, total [as Fe]	daily maximum	report only (mg/L) (alert, not enforceable)	all year	001
Iron, total [as Fe]	daily maximum	report only (mg/L) (alert, not enforceable)	all year	001
Iron, total [as Fe]	daily maximum	≤ .25 mg/L (alert, not enforceable)	all year	001
Oxidants, total residual	monthly average	report only (mg/L)	all year	001
Oxidants, total residual	daily maximum	≤ .1 mg/L	all year	001
Oxidants, total residual	daily maximum	≤ .1 mg/L	all year	001
Nitrogen, ammonia, total [as NH3]	daily maximum	≤ 1.81 mg/L	Jan, Feb, Mar, Apr, May, Nov, Dec	001
Nitrogen, ammonia, total [as NH3]	daily maximum	≤ .55 mg/L	Jun–Oct	001
Duration	annual total	≤ 100 hr	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	≤ 520 MGD	all year	001
Net rate of additionof heat	daily maximum	report only (MBTU/hr)	all year	001
Temp. difference, summer [deg. F]	monthly average	report only (deg F)	all year	001
Temp. difference, summer [deg. F]	daily maximum	≤ 25 deg F	all year	001
Temp. difference, winter [deg. F]	monthly average	report only (deg F)	all year	001
Temp. difference, winter [deg. F]	daily maximum	≤ 35 deg F	all year	001
Hydrazine	daily maximum	≤ 16.6 ug/L	all year	001
Duration of discharge	daily maximum	report only (hr/mo)	all year	001
Outfall observation,visual, y/n response	value	report only (N=0;Y=1)	all year	002
Flow rate	daily maximum	report only (gal/d)	all year	003
pH	minimum	≥ 6 SU	all year	003
pH	maximum	≤ 9 SU	all year	003
Solids, total suspended	daily maximum	≤ 50 mg/L	all year	003
Oil & Grease	daily maximum	≤ 15 mg/L	all year	003
Outfall observation,visual, y/n response	value	report only (N=0;Y=1)	all year	003
Outfall observation,visual, y/n response	value	report only (N=0;Y=1)	all year	004
Flow rate	monthly average	report only (gal/d)	all year	005
Flow rate	daily maximum	report only (gal/d)	all year	005
Oxygen demand, chem. [high level] [COD]	daily maximum	report only (mg/L)	all year	005
pH	minimum	≥ 6 SU	all year	005
pH	maximum	≤ 9 SU	all year	005
Solids, total suspended	daily maximum	≤ 50 mg/L	all year	005
Oil & Grease	daily maximum	≤ 15 mg/L	all year	005
Solids, total dissolved	daily maximum	report only (mg/L)	all year	005
Outfall observation,visual, y/n response	value	report only (N=0;Y=1)	all year	005
Temperature, water deg. fahrenheit	daily maximum	≤ 90 deg F	all year	006
Flow rate	monthly average	report only (gal/d)	all year	006
Flow rate	daily maximum	report only (gal/d)	all year	006
pH	minimum	≥ 6 SU	all year	006
pH	maximum	≤ 9 SU	all year	006
Chlorine, total residual	daily maximum	≤ .1 mg/L	all year	006
Flow rate	monthly average	report only (gal/d)	all year	007
Flow rate	daily maximum	report only (gal/d)	all year	007
pH	minimum	≥ 6 SU	all year	007
pH	maximum	≤ 9 SU	all year	007
Solids, total suspended	daily maximum	≤ 50 mg/L	all year	007
Oil & Grease	daily maximum	≤ 15 mg/L	all year	007
Outfall observation,visual, y/n response	value	report only (N=0;Y=1)	all year	007
Flow rate	monthly average	report only (gal/d)	all year	008
Flow rate	daily maximum	report only (gal/d)	all year	008
pH	minimum	≥ 6.5 SU	all year	008
pH	maximum	≤ 8.5 SU	all year	008
Solids, total suspended	daily maximum	≤ 50 mg/L	all year	008
Oil & Grease	daily maximum	≤ 15 mg/L	all year	008
Outfall observation,visual, y/n response	value	report only (N=0;Y=1)	all year	008
Flow rate	monthly average	report only (gal/d)	all year	009
Flow rate	daily maximum	report only (gal/d)	all year	009
pH	minimum	≥ 6 SU	all year	009
pH	maximum	≤ 9 SU	all year	009
Solids, total suspended	daily maximum	≤ 50 mg/L	all year	009
Oil & Grease	daily maximum	≤ 15 mg/L	all year	009
Outfall observation,visual, y/n response	value	report only (N=0;Y=1)	all year	009
Flow rate	monthly average	report only (gal/d)	all year	010
Flow rate	daily maximum	report only (gal/d)	all year	010
pH	minimum	≥ 6 SU	all year	010
pH	maximum	≤ 9 SU	all year	010
Solids, total suspended	daily maximum	≤ 50 mg/L	all year	010
Oil & Grease	daily maximum	≤ 15 mg/L	all year	010
Outfall observation,visual, y/n response	value	report only (N=0;Y=1)	all year	010
Flow rate	monthly average	report only (gal/d)	all year	01A
Flow rate	daily maximum	≤ 3800 gal/d	all year	01A
Specific conductance	daily maximum	≤ 10 umho/cm	all year	01A
pH	minimum	≥ 6 SU	all year	01A
pH	maximum	≤ 9 SU	all year	01A
Solids, total suspended	monthly average	≤ 30 mg/L	all year	01A
Solids, total suspended	daily maximum	≤ 100 mg/L	all year	01A
Oil & Grease	monthly average	report only (mg/L)	all year	01A
Oil & Grease	daily maximum	≤ 15 mg/L	all year	01A
Copper, total [as Cu]	daily maximum	≤ 1 mg/L	all year	01A
Iron, total [as Fe]	daily maximum	≤ 4 mg/L	all year	01A
Flow rate	daily maximum	report only (gal/d)	all year	01B
pH	minimum	≥ 6 SU	all year	01B
pH	maximum	≤ 9 SU	all year	01B
Solids, total suspended	daily maximum	≤ 50 mg/L	all year	01B
Oil & Grease	monthly average	report only (mg/L)	all year	01B
Oil & Grease	daily maximum	≤ 15 mg/L	all year	01B
Arsenic, total [as As]	daily maximum	≤ .15 mg/L	all year	01B
Boron, total [as B]	daily maximum	≤ 20 mg/L	all year	01B
Chromium, total [as Cr]	daily maximum	≤ 1.5 mg/L	all year	01B
Copper, total [as Cu]	daily maximum	≤ 1 mg/L	all year	01B
Iron, total [as Fe]	daily maximum	≤ 4 mg/L	all year	01B
Zinc, total [as Zn]	daily maximum	≤ .3 mg/L	all year	01B
Nitrogen, ammonia, total [as NH3]	daily maximum	report only (mg/L)	all year	01B
Flow rate	daily maximum	report only (gal/d)	all year	01C
Specific conductance	daily maximum	≤ 10 umho/cm	all year	01C
pH	minimum	≥ 6 SU	all year	01C
pH	maximum	≤ 9 SU	all year	01C
Solids, total suspended	monthly average	≤ 30 mg/L	all year	01C
Solids, total suspended	daily maximum	≤ 100 mg/L	all year	01C
Oil & Grease	daily maximum	≤ 15 mg/L	all year	01C
Boron, total [as B]	monthly average	report only (mg/L)	all year	01C
Boron, total [as B]	daily maximum	report only (mg/L)	all year	01C
Boron, total [as B]	monthly average	≤ 140 lb/d	all year	01C
Copper, total [as Cu]	daily maximum	report only (mg/L)	all year	01C
Flow rate	monthly average	report only (gal/d)	all year	02A
Flow rate	daily maximum	report only (gal/d)	all year	02A
pH	minimum	≥ 6 SU	all year	02A
pH	maximum	≤ 9 SU	all year	02A
Solids, total suspended	monthly average	≤ 30 mg/L	all year	02A
Solids, total suspended	daily maximum	≤ 100 mg/L	all year	02A
Oil & Grease	monthly average	report only (mg/L)	all year	02A
Oil & Grease	daily maximum	≤ 15 mg/L	all year	02A
Copper, total [as Cu]	daily maximum	≤ 1 mg/L	all year	02A
Iron, total [as Fe]	daily maximum	≤ 4 mg/L	all year	02A
pH range excursions, > 60 minutes	monthly total	≤ 0 occur/mo	all year	02A
pH range excursions, monthly total accum	daily maximum	≤ 446 min	all year	02A

How strict are these limits?

Your permit document is the final word. As JSON: /api/v1/permits/NY0000493 · MCP: https://passage-data.com/mcp