​​​​​Utility Territories Served​​

Serving 26 States and Growing​​​

Toll Free: 800-495-9880
E-mail: CES_Communications@CenterPointEnergy.com​ ​

​​
Arizona: ​

​Unisource Energy Services
Southwest Gas Corporation

Arkansas: ​

​Arkansas Oklahoma Gas 
​​SourceGas
CenterPoint Energy (Arkla)

California: ​Southwest Gas Corporation
Southern California Gas Company (SoCalgas)
San Diego Gas & Electric
Colorado: Atmos-Colorado
​Xcel Energy (PSCO)
Black Hills Energy
Rocky Mountain Natural Gas LLC
Sourcegas Distribution LLC
Colorado Natural Gas (Summit Utilities, Inc.)
Colorado Springs Utilities
Illinois: 

Ameren (CIPS, CILCO, IP)                    
Jo Carroll
Nicor  

North Shore  
Peoples Gas Light & Coke

Rock Energy

Indiana:Citizen's Gas
Fountaintown Gas  
NIPSCO  
Ohio Valley Gas  
Sycamore Gas Company (Lawrenceburg Gas Company)                      
Vectren North  
Vectren South 
Citizen's Energy Group
Iowa: Alliant  
Black Hills Energy  
MidAmerican Energy
Kansas:Atmos - Kansas  
Kansas Gas Service 
Black Hills
Kentucky: Atmos Kentucky
Columbia Gas of Kentucky  
Louisville Gas & Electric 
Louisiana: 

CenterPoint Energy (Arkla)
CenterPoint Energy (Entex) 

Michigan: 

Consumers Energy  
DTE Energy (MichCon)  
Michigan Gas Utilities
SEMCO Energy Gas Company
Somerset Gas Service

Minnesota: CenterPoint Energy  (MN Gas)
Minnesota Energy Resources  
Xcel Energy
Mississippi: Atmos Energy 
CenterPoint Energy (Entex)
Missouri: ​Liberty Utilities
Atmos Energy 
Ameren UE
Laclede Gas Company
Southern MO Natural Gas
Missouri Gas Energy (Laclede Group)
Nebraska: Black Hills Energy  
Metropolitan Utilities District  
Northwestern Energy  
Sourcegas Distribution LLC
Nevada:CenterPoint Energy  
Oklahoma Natural Gas 
New MexicoCenterPoint Energy  
Oklahoma Natural Gas 
Ohio: ​Vectren Energy
Columbia Gas of Ohio (A NiSource Company)
Duke Energy Ohio
Oklahoma:CenterPoint Energy  (Arkla)
Oklahoma Natural Gas (ONG)
South Dakota: Mid American Energy
Northwestern Energy
Texas: 

CenterPoint Energy (Entex)
Texas Gas Services
Westex

Utah:Questar Gas 
West Virginia: Mountaineer Gas 
Wisconsin Alliant (Wisconsin Power & Light)
Antigo City Gas Co.
Madison Gas & Electric 

St. Croix Gas
Superior Water, Light & Power
Wisconsin Public Service 

WE-Energies (WEGO & WGC)
Xcel Energy
Wyoming: ​Questar Gas
Sourcegas ​​​Distribution LLC