Electric Substations in Massachusetts
229 named substations in Massachusetts, with the highest-voltage facilities listed first. Each substation profile shows voltage class, connected transmission lines, and the datacenter candidate sites closest to it.
At a glance
How is Massachusetts's substation network split by voltage?
By maximum voltage, the named substations break down as 31 at 345–499 kV; 8 at 230–344 kV; 144 at 115–229 kV; 13 at 69–114 kV; 33 withvoltage not recorded. 14% of Massachusetts's named substations operate at 345 kV or above, against 8% across all 16,654 named US substations. The state median of 115 kV is level with the national median of 115 kV.
How does Massachusetts compare with other states?
Massachusetts ranks 20th of 50 states and DC by number of named substations and 16th by named substations at 345 kV or above. It also has 1,861 scored datacenter candidate sites with an average DC Readiness score of 54.2 (national average 53), and an average power sub-score of 35 against 37.4 nationally. Most of those sites (1,859) are in the ISO-NE market.
Which substations in Massachusetts have the highest voltage?
| Substation | Max voltage | Connected lines | Line owner |
|---|---|---|---|
| AGAWAM | 345 kV | 10 | CONNECTICUT LIGHT & POWER CO |
| AUBURN STREET | 345 kV | 9 | TOWN OF MIDDLEBOROUGH - (MA) |
| BERKSHIRE | 345 kV | 6 | WESTERN MASSACHUSETTS ELEC CO |
| BERRY STREET | 345 kV | 8 | — |
| BRIDGEWATER | 345 kV | 12 | TOWN OF MIDDLEBOROUGH - (MA) |
| CANAL | 345 kV | 5 | NSTAR ELECTRIC COMPANY |
| CARPENTER HILL | 345 kV | 6 | FITCHBURG GAS AND ELECTRIC LIGHT COMPANY |
| CARVER | 345 kV | 8 | TOWN OF MIDDLEBOROUGH - (MA) |
| FALL RIVER | 345 kV | 5 | — |
| FALL RIVER (345 KV) | 345 kV | 4 | — |
| GOLDEN HILLS | 345 kV | 1 | — |
| HOLBROOK | 345 kV | 11 | TOWN OF MIDDLEBOROUGH - (MA) |
| HYDE PARK | 345 kV | 2 | NSTAR ELECTRIC COMPANY |
| K STREET | 345 kV | 8 | NSTAR ELECTRIC COMPANY |
| KINGSTON STREET | 345 kV | 10 | NSTAR ELECTRIC COMPANY |
| LEXINGTON | 345 kV | 4 | — |
| LUDLOW | 345 kV | 10 | CONNECTICUT LIGHT & POWER CO |
| MILLBURY NO. 3 | 345 kV | 6 | FITCHBURG GAS AND ELECTRIC LIGHT COMPANY |
| MYSTIC | 345 kV | 9 | NSTAR ELECTRIC COMPANY |
| NORTH CAMBRIDGE | 345 kV | 5 | NSTAR ELECTRIC COMPANY |
| NORTHFIELD | 345 kV | 4 | GREEN MOUNTAIN POWER CORP |
| SANDY POND | 345 kV | 11 | FITCHBURG GAS AND ELECTRIC LIGHT COMPANY |
| STOUGHTON | 345 kV | 5 | NSTAR ELECTRIC COMPANY |
| TEWKSBURY NO. 22A | 345 kV | 5 | FITCHBURG GAS AND ELECTRIC LIGHT COMPANY |
| WACHUSETT | 345 kV | 11 | FITCHBURG GAS AND ELECTRIC LIGHT COMPANY |
| WAKEFIELD JUNCTION | 345 kV | 8 | FITCHBURG GAS AND ELECTRIC LIGHT COMPANY |
| WARD HILL | 345 kV | 5 | — |
| WEST AMESBURY | 345 kV | 3 | PUBLIC SERVICE CO OF NH |
| WEST MEDWAY | 345 kV | 10 | FITCHBURG GAS AND ELECTRIC LIGHT COMPANY |
| WEST WALPOLE | 345 kV | 10 | TOWN OF MIDDLEBOROUGH - (MA) |
| WOBURN | 345 kV | 8 | FITCHBURG GAS AND ELECTRIC LIGHT COMPANY |
| BEAR SWAMP | 230 kV | 5 | WESTERN MASSACHUSETTS ELEC CO |
| FRAMINGHAM | 230 kV | 5 | — |
| MEDWAY | 230 kV | 4 | FITCHBURG GAS AND ELECTRIC LIGHT COMPANY |
| PRATTS JUNCTION | 230 kV | 12 | FITCHBURG GAS AND ELECTRIC LIGHT COMPANY |
| SUDBURY | 230 kV | 4 | — |
| TEWKSBURY SUBSTATION | 230 kV | 12 | FITCHBURG GAS AND ELECTRIC LIGHT COMPANY |
| WALPOLE | 230 kV | 5 | — |
| WALTHAM | 230 kV | 6 | NSTAR ELECTRIC COMPANY |
| ACUSHNET TAP | 115 kV | 2 | NSTAR ELECTRIC COMPANY |
| ADAMS | 115 kV | 4 | WESTERN MASSACHUSETTS ELEC CO |
| AMHERST | 115 kV | 4 | WESTERN MASSACHUSETTS ELECTRIC COMPANY |
| ARSENE | 115 kV | 2 | NSTAR ELECTRIC COMPANY |
| ASHBURNHAM | 115 kV | 2 | FITCHBURG GAS AND ELECTRIC LIGHT COMPANY |
| ASHFIELD | 115 kV | 2 | — |
| AYER | 115 kV | 6 | FITCHBURG GAS AND ELECTRIC LIGHT COMPANY |
| BAKER STREET | 115 kV | 7 | NSTAR ELECTRIC COMPANY |
| BARRE | 115 kV | 2 | FITCHBURG GAS AND ELECTRIC LIGHT COMPANY |
| BARTHOLOMEW STREET | 115 kV | 2 | — |
| BELL ROCK ROAD | 115 kV | 5 | NSTAR ELECTRIC COMPANY |
| BELMONT | 115 kV | 2 | TOWN OF MIDDLEBOROUGH - (MA) |
| BILLERICA | 115 kV | 2 | FITCHBURG GAS AND ELECTRIC LIGHT COMPANY |
| BLACKSTONE JUNCTION | 115 kV | 6 | — |
| BLOOMINGDALE | 115 kV | 1 | FITCHBURG GAS AND ELECTRIC LIGHT COMPANY |
| BOURNE | 115 kV | 3 | — |
| BOURNE SWITCHING STATION | 115 kV | 6 | NSTAR ELECTRIC COMPANY |
| BRIGHTON | 115 kV | 7 | NSTAR ELECTRIC COMPANY |
| BROOK STREET | 115 kV | 6 | — |
| BUCK POND | 115 kV | 2 | — |
| BURLINGTON | 115 kV | 2 | — |
Every named substation in Massachusetts
All 229 named substations, grouped by voltage band.
345–499 kV · 31
- AGAWAM
- AUBURN STREET
- BERKSHIRE
- BERRY STREET
- BRIDGEWATER
- CANAL
- CARPENTER HILL
- CARVER
- FALL RIVER
- FALL RIVER (345 KV)
- GOLDEN HILLS
- HOLBROOK
- HYDE PARK
- K STREET
- KINGSTON STREET
- LEXINGTON
- LUDLOW
- MILLBURY NO. 3
- MYSTIC
- NORTH CAMBRIDGE
- NORTHFIELD
- SANDY POND
- STOUGHTON
- TEWKSBURY NO. 22A
- WACHUSETT
- WAKEFIELD JUNCTION
- WARD HILL
- WEST AMESBURY
- WEST MEDWAY
- WEST WALPOLE
- WOBURN
115–229 kV · 144
- ACUSHNET TAP
- ADAMS
- AMHERST
- ARSENE
- ASHBURNHAM
- ASHFIELD
- AYER
- BAKER STREET
- BARRE
- BARTHOLOMEW STREET
- BELL ROCK ROAD
- BELMONT
- BILLERICA
- BLACKSTONE JUNCTION
- BLOOMINGDALE
- BOURNE
- BOURNE SWITCHING STATION
- BRIGHTON
- BROOK STREET
- BUCK POND
- BURLINGTON
- BURTT ROAD
- CADWELL SWITCHING STATION
- CANTON
- CHARTLEY POND
- CHELSEA SUBSTATION
- CHICOPEE
- CLEARY FLOOD
- CUMBERLAND
- DARTMOUTH
- DEWAR STREET
- DIGHTON
- DOREEN
- DRAGON COURT
- DUXBURY
- EAST BRIDGEWATER
- EAST HOLBROOK
- EAST METHUEN
- EAST TEWKSBURY
- EAST WEYMOUTH
- EAST WINCHENDON
- EASTON
- EDGAR
- ELECTRIC AVENUE SUBSTATION
- EVERETT
- FALMOUTH
- FISHER ROAD
- FITCHBURG
- FIVE CORNERS
- FOREST AVENUE STATION
- FRANCONIA
- GREENDALE
- GROVE STREET
- HAMPDEN
- HARTWELL AVENUE
- HATCHVILLE
- HATHAWAY STREET
- HIGH HILL
- HIGH HILL SWITCHING STATION
- HOBART STREET
- INDUSTRIAL PARK
- KING STREET
- KINGSTON
- LITTLE REST ROAD
- LITTLETON
- LYNN
- MANSFIELD
- MAPLEWOOD
- MARSHFIELD
- MEADOWBROOK
- MELROSE
- MID WEYMOUTH
- MIDDLETON
- MILFORD DEPOT
- MILLBURY NO.2
- MINK STREET
- MONTAGUE/CABOT
- NASHUA STREET
- NEEDHAM
- NORTH ATTLEBORO
- NORTH CHELMSFORD
- NORTH DRACUT
- NORTH MARLBORO
- NORTH OXFORD
- NORTH READING
- NORTHBORO ROAD
- NORWELL
- NORWOOD
- ORCHARD
- ORLEANS
- PALMER
- PARKVIEW
- PAXTON
- PERRY STREET
- PINEHURST
- PIPER
- PLAINFIELD
- PODICK
- RAILYARD
- READ STREET
- READING
- REVERE
- ROBINSON AVENUE
- ROCKY HILL
- ROLFE AVENUE
- SCITUATE
- SEMASS TAP
- SHARON AMTRAK
- SHAWINIGAN SWITCHING STATION
- SHERBORN
- SILVER
- SOMERSET
- SOUTH AGAWAM SWITCHING STATION
- SOUTH BROADWAY
- SOUTH DANVERS
- SOUTH RANDOLPH
- SOUTH WRENTHAM
- SOUTHWICK
- SPEEN STREET
- SWANSEA
- SYKES ROAD
- TAUNTON TAP
- THORNDIKE
- TRAPELO ROAD
- TREMONT
- UNION STREET
- VERNON HILL
- WAKEFIELD
- WARE
- WAREHAM VALLEY
- WATER STREET
- WATERS RIVER
- WEBSTER STREET
- WEST ANDOVER
- WEST BOYLSTON
- WEST CHARLTON
- WEST FRAMINGHAM
- WEST METHUEN
- WEST SALEM
- WEST SPRINGFIELD
- WESTFORD
- WING LANE
- WOODCHUCK HILL
- WYMAN-GORDON
69–114 kV · 13
voltage not recorded · 33
- ANDREW SQUARE
- BRECKWOOD
- CANTON STREET
- CHATHAM STREET
- COLBURN STREET
- EAST DRACUT
- EAST LONGMEADOW
- EAST SPRINGFIELD
- FIELD STREET
- HAWKINS STREET
- HIGH STREET
- KENDALL
- LUNENBURG
- MASSACHUSETTS ELECTRIC COMPANY WILLIAMSTOWN SUBSTATION
- MELROSE #4 SUBSTATION
- NEWTON HIGHLANDS
- NORTH ADAMS
- NORTH GRAFTON
- NORTH QUINCY
- PLEASANT STREET
- PRINCETON ROAD
- PUTNAM SUBSTATION
- RIVER STREET
- SCOTIA STREET SUBSTATION
- SHREWSBURY
- SILVER LAKE
- SOMERVILLE
- SUMMER STREET
- TOWNSEND
- WATERTOWN
- WEST TOWNSEND
- WESTBORO
- WILBRAHAM
Frequently asked questions
How many electric substations are in Massachusetts?
HIFLD records 612 substations in Massachusetts, of which 229 carry a station name. That is the 20th-most named substations of any state in the dataset.
What is the highest-voltage substation in Massachusetts?
31 named substations in Massachusetts share the top voltage of 345 kV, including AGAWAM, AUBURN STREET, BERKSHIRE.
Which substation in Massachusetts connects the most transmission lines?
MILLBURY NO.2 has the most connected transmission lines of the named substations listed here, with 13 at up to 115 kV.
How many substations in Massachusetts are 345 kV or higher?
31 of 229 named substations (14%) operate at 345 kV or above, compared with 8% nationally. Massachusetts ranks 16th of 50 states and DC for named substations at that level.
How many datacenter candidate sites in Massachusetts are at substations?
305 of the 1,861 scored candidate sites in Massachusetts are substation sites — locations generated at an existing substation. Scored sites across Massachusetts average 54.2 on the 0–100 DC Readiness scale, against 53 nationally.
Looking for a specific record? The directory lists every substation in Massachusetts, A to Z.
More on Massachusetts, and states with similar counts
About this data
Source: HIFLD Electric Substations and Transmission Lines (U.S. Department of Homeland Security), as published June 29, 2026. See the methodology for how records are matched, cleaned and scored.
Cite as: GridCensus, “Electric substations in Massachusetts”, https://gridcensus.com/substations/massachusetts (data as of June 29, 2026).
Dataset updated . Screening estimates derived from public data sources.
Go deeper than the public screen
Every site and score for substations in Massachusetts is free to browse. Pro adds Watchtower on 25 sites, alerts when new candidate sites, datacenters or interconnection-queue requests appear in your markets, score and capacity history, and CSV export. Enterprise adds team seats, weekly data files for all 147,272 sites, the REST API and an MCP server for AI tools.