SOUTH WRENTHAM
SubstationMassachusetts
At a glance
SOUTH WRENTHAM is an electric transmission substation in Massachusetts. It is classified as sub-transmission (115 kv) and connects 2 transmission lines. Substation proximity is one of the strongest speed-to-power signals for siting a datacenter — interconnection distance to an energized, high-voltage bus is often the binding constraint on time-to-energization.
Voltage & classification
Ownership
No owner is recorded for the lines that connect here.
Connected transmission lines
Lines terminating at or passing through this substation, by HIFLD line ID, highest voltage first.
| Line ID | Voltage | Owner | Status | Length |
|---|---|---|---|---|
| #101229 | 115 kV | — | IN SERVICE | 0.1 mi |
| #148428 | 115 kV | — | IN SERVICE | 0.1 mi |
Nearby datacenter candidate sites
Scored candidate sites within roughly 25 miles of SOUTH WRENTHAM, ranked by DC Readiness. Sites this close to an energized substation carry a strong speed-to-power advantage.
| Site | Type | State | County | Voltage | Capacity | Queue wait | Score |
|---|---|---|---|---|---|---|---|
| MYSTIC | Substation-Adjacent | MA | Suffolk County | 345 kV | 600 MW | 4.3 yrs | 72.4 |
| K STREET | Substation-Adjacent | MA | Suffolk County | 345 kV | 600 MW | 4.3 yrs | 72.4 |
| KINGSTON STREET | Substation-Adjacent | MA | Suffolk County | 345 kV | 600 MW | 4.3 yrs | 68.2 |
| NORTH CAMBRIDGE | Substation-Adjacent | MA | Suffolk County | 345 kV | 600 MW | 4.3 yrs | 68.1 |
| KENT COUNTY | Substation-Adjacent | RI | Kent County | 345 kV | 600 MW | 4.3 yrs | 67.3 |
| WEST FARNUM | Substation-Adjacent | RI | Providence County | 345 kV | 600 MW | 4.3 yrs | 67.2 |
| HYDE PARK | Substation-Adjacent | MA | Suffolk County | 345 kV | 600 MW | 4.3 yrs | 66.9 |
| HOLBROOK | Substation-Adjacent | MA | Norfolk County | 345 kV | 600 MW | 4.3 yrs | 66.7 |
How does SOUTH WRENTHAM compare with other substations in Massachusetts?
Massachusetts has 612 substation records in HIFLD, of which 229 carry a station name; the rest are unnamed tap points, risers and line ends. 144 named substations in the state are in SOUTH WRENTHAM's 115–229 kV band (63% of named stations). 39 sit in a higher band. 31 named substations in Massachusetts operate at 345 kV or above. The highest voltage recorded in the state is 345 kV, and the state median is 115 kV.
How do candidate sites near SOUTH WRENTHAM score?
The 8 highest-scoring candidate sites within about 25 miles range from 67 to 72 on the 0–100 DC Readiness scale. They fall in Suffolk County, Kent County, Providence County, Norfolk County. The Massachusetts average across 1,861 scored sites is 54.2. 305 of those Massachusetts sites are classed as substation sites (candidate locations generated at an existing substation).
Frequently asked questions
What voltage is SOUTH WRENTHAM substation?
SOUTH WRENTHAM has a maximum voltage of 115 kV. That places it in the 115–229 kV band. The median named US substation in this dataset is 115 kV, so SOUTH WRENTHAM is at the national midpoint.
How many transmission lines connect to SOUTH WRENTHAM substation?
2 transmission lines terminate at or pass through SOUTH WRENTHAM in the HIFLD line data. The connected lines listed here run at 115 kV. Together the listed lines cover about 0.2 miles.
Where is SOUTH WRENTHAM substation located?
SOUTH WRENTHAM is in Massachusetts at 42.0300, -71.3492. The datacenter candidate sites closest to it are in Suffolk County, Kent County, Providence County.
Are there datacenter candidate sites near SOUTH WRENTHAM substation?
GridCensus lists at least 8 scored candidate sites within roughly 25 miles of SOUTH WRENTHAM. The highest-scoring is MYSTIC at 72/100. Across Massachusetts, the average DC Readiness score is 54.2.
Other 115 kV substations in Massachusetts
- MILLBURY NO.2· 13 lines
- SOMERSET· 10 lines
- DOREEN· 8 lines
- BAKER STREET· 7 lines
- BRIGHTON· 7 lines
- FITCHBURG· 7 lines
- AYER· 6 lines
- BLACKSTONE JUNCTION· 6 lines
- All named substations in Massachusetts· 229 stations
- Datacenter candidate sites in Massachusetts· 1,861 sites
- Brownfield and retired plant sites in Massachusetts
- Substations by state
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, “SOUTH WRENTHAM substation, Massachusetts”, https://gridcensus.com/substations/massachusetts/south-wrentham-1444c0b2 (data as of June 29, 2026).
Dataset updated . Screening estimates derived from public data sources.
Substation attributes are derived from public HIFLD / EIA infrastructure data and may lag real-world upgrades or retirements. Voltage and connected-line counts are screening figures — confirm available capacity and interconnection terms directly with the operating utility and ISO.
Go deeper than the public screen
Every site and score for SOUTH WRENTHAM substation, 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.