Massachusetts Bay Trans Authority
Political Subdivision electric utility · Massachusetts · #3,119 of 3,199 U.S. utilities by customers · EIA utility #49848
Massachusetts Bay Trans Authority is a political subdivision electric utility serving 68 customers in Massachusetts. In 2025 it sold 36.7 gigawatt-hours of electricity for $5.74M in revenue, an average realized rate of 15.63¢ per kWh across all customer classes and — per kWh for residential customers. Its reported service territory covers 3 counties. EIA records its activities as: buying transmission, distribution, buying distribution, wholesale marketing, retail marketing.
Customers, sales and rates by customer class (2025)
| Class | Customers | Sales (GWh) | Revenue | Avg realized rate | Share of sales |
|---|---|---|---|---|---|
| Commercial | 66 | 2.8 | $767.50K | 27.90¢ | |
| Transportation | 2 | 33.9 | $4.97M | 14.64¢ | |
| Total | 68 | 36.7 | $5.74M | 15.63¢ |
Average realized rate = revenue divided by sales as reported on EIA Form 861. It blends fixed charges, demand charges and riders into one per-kWh figure; it is not the utility's tariff rate. Estimated residential bill assumes the average residential customer's actual 2025 usage (— kWh/month).
Five-year trend
| Year | Customers | Sales (GWh) | Revenue | Residential rate |
|---|---|---|---|---|
| 2021 | 69 | 41.9 | $6.19M | — |
| 2022 | 68 | 39.7 | $6.61M | — |
| 2023 | 68 | 37.5 | $4.50M | — |
| 2024 | 68 | 36.6 | $4.92M | — |
| 2025 | 68 | 36.7 | $5.74M | — |
Energy supply (2025)
Net generation: — GWh
Wholesale power purchased: 350 GWh
Winter peak demand: 62 MW
Counties served
Middlesex, MANorfolk, MASuffolk, MA
Other large utilities in Massachusetts
- Constellation NewEnergy, Inc - 1,541,139 customers, residential 12.92¢
- Direct Energy Services - 1,310,067 customers, residential 14.56¢
- Massachusetts Electric Co - 486,042 customers, residential 33.66¢
- First Point Power, LLC - 353,137 customers, residential 13.82¢
- NSTAR Electric Company - 340,640 customers, residential 21.49¢
- Clearview Electric Inc. - 64,976 customers, residential 14.61¢
- City of Taunton - (MA) - 40,045 customers, residential 18.81¢
- Town of Reading - (MA) - 28,337 customers, residential 19.95¢
All Massachusetts utilities and rates
Source: U.S. Energy Information Administration, Form EIA-861 2025 (filed by the utility; figures as published). Utility #49848 in the EIA frame.