For Suppliers and Partners 
ISO maps 

Independent System Operator (ISO) Map

A portion of the RG&E service area is located in Zone B - Genesee, which is West of the NYISO interface.

For information about New York State's wholesale energy market and these energy pricing zones, visit the New York Independent System Operator's (NYISO's) Web site at

The Rochester, Canandaigua-Finger Lakes, Lake Shore and Genesee districts are listed below.

*RG&E services a portion of this area.


 Rochester District

Canandaigua-Finger Lakes District 

 Lake Shore District

 Genesee District

 Monroe County  Ontario County  Wayne County  Alleghany County
 City of Rochester  City of Canandaigua  Village of Red Creek  Village of Belmont
     VIllage of Sodus  Village of Bolivar
 Village of East Rochester  Village of Bloomfield  VIllage of Sodus Point  Village of Fillmore
 Village of Hilton  Village of Holcomb  Willage of Walcott  Village of Friendship
 Village of Pittsford  Village of Manchester    Village of Richburg
 ViIlage of Webster  Village of Shortsville  Town of Butler  
   Village of Victor  Town of Savannah*  Town of Allen
 Town of Brighton    Town of Huron  Town of Amity
 Town of Henrietta*  Town of Bristol  Town of Sodus  Town of Angelica*
 Town of Penfield  Town of Hopewell*  Town of Marion  Town of Belfast
 Town of Chili  Town of Canandaigua  Town of Williamson  Town of Bolivar
 Town of Irondequoit  Town of Manchester*  Town of Ontario  Town of Friendship
 Town of Perinton  Town of East Bloomfield  Town of Walcott  Town of Genesee
 Town of Gates  Town of South Bristol  Town of Rose  Town of Granger
 Town of Mendon  Town of Farmington    Town of Hume
 Town of Pittsford  Town of Victor  Cayuga County  Town of Rushford
 Town of Greece    Village of Cato  Town of Caneadea
 Town of Ogden    Village of Fair Haven  Town of Wirt
 Town of Parma    Village of Meridian  Town of Clarksville
 Town of Webster      
     Town of Cato  Wyoming County
 Wayne County    Town of Conquest  Village of Pike
 Town of Macedon    Town of Ira  
 Town of Walworth    Town of Sterling  Town of Arcade*
     Town of Victory  Town of Eagle
       Town of Genesee Falls*
       Town of Pike
       Livingston County
       Village of Geneseo
       Village of Mt. Morris
       Village of Nunda
       Town of Geneseo*
       Town of Leicester*

 Town of Mt. Morris*

       Town of Nunda
       Town of Portage