The Department of Energy Resources (DOER) tracks the total loads and the total number of customers switching to competitive suppliers in gas and electric.
 
The yearly data tables below illustrate the migration of gas customers in Massachusetts from incumbent generation sources to competitive generation sources. You can also download Excel spreadsheets of the tables (by month and by year), which also include migration data broken down by local distribution company.

Notes and definitions:

All data were collected from local distribution companies, who reported data by their respective rate classes. Each company reported two data elements each for both incumbent and competitive generation service: (1) the number of customers on the last day of the month, and (2) the energy in (therms/CCF) used during the entire month.

Data for residential include (heating and non –heating), farm, and street-lights rate classes are shown as reported by the distribution companies. The commercial and industrial (C&I) rate-class data were aggregated by DOER as follows: Low load factor (small, medium, and large); and high load factor ( small, medium, and large):

Low Load Factor: Small low load factor includes rate classes with average monthly usage levels below or equal to   32,500 cubic feet; medium low load factor includes rate classes with average monthly usage levels greater than 32,501 cubic feet /month but less than or equal to 100,000 cubic feet/month; and large low load factor includes rate classes with average monthly usage levels equal to and greater than 100,001 cubic feet/month.  

High Load Factor:  Small high load factor includes rate classes with average monthly usage levels greater than 8,000 cubic feet/month but less than or equal to 45,000 cubic feet/month; medium high load factor includes rate classes with average monthly usage levels greater than 45,001 cubic feet /month but less than or equal to 180,000 cubic feet/month; and large high load factor includes rate classes with average monthly usage levels equal to and greater than 180,001 cubic feet/month.  

DOER chose this particular aggregation scheme to simplify the reported data. DOER does not endorse any particular conclusions or findings that may result from the data.

2014 Migration Data

Jan 14 xlsx format of Jan 14   Feb 14 xlsx format of Feb 14    Mar 14 xlsx format of Mar 14
   
   
   

 

2013 Migration Data xlsx format of 2013 Migration Data

Jan 13 xlsx format of Jan 13 Feb 13 xlsx format of Feb 13 Mar 13 xlsx format of Mar 13
Apr 13 xlsx format of Apr 13 May 13 xlsx format of May 13 Jun 13 xlsx format of Mar 13
Jul 13 xlsx format of Jul 13   Aug 13 xlsx format of Aug 13   Sep 13 xlsx format of Sep 13  
Oct 13 xlsx format of Oct 13   Nov 13 xlsx format of Nov 13   Dec 13 xlsx format of Dec 13