Item 2. Properties
Item 2. Properties
As of December 31, 2025, Unitil owned through its natural gas and electric distribution utilities, seven utility operating centers located in New Hampshire, Maine and Massachusetts. The Company’s real estate subsidiary, Unitil Realty, owns the Company’s corporate headquarters building and the land on which it is located in Hampton, New Hampshire. Unitil Realty also owns land in Kingston, New Hampshire on which Unitil Energy’s solar facility is located that became operational in May 2025.
The following tables detail certain of the Company’s electric and natural gas operations properties.
Electric Operations
Description
Unitil Energy
Fitchburg
Total
Primary Transmission and Distribution Pole Miles—Overhead
1,290
454
1,744
Conduit Distribution Bank Miles—Underground
245
69
314
Transmission and Distribution Substations*
26
11
37
Transformer Capacity of Transmission and Distribution Substations** (MVA)
458.1
410.9
869.0
* Includes locations that are normally in-service sources of distribution circuits through the use of transformer(s).
** Does not include load served directly from sub-transmission.
Natural Gas Operations
Northern Utilities
Description
NH
ME
Fitchburg
Bangor
Maine Natural
Granite State
Total
Underground Natural Gas Mains—Miles
589
613
270
376
233
—
2,081
Natural Gas Transmission Pipeline—Miles
—
—
—
9
2
85
96
Service Pipes
25,192
24,463
11,245
8,058
5,470
—
74,428
Unitil Energy’s electric substations are located on land owned by Unitil Energy or land occupied by Unitil Energy pursuant to perpetual easements in the southeastern seacoast and state capital regions of New Hampshire . Unitil Energy’s electric distribution lines are located in, on or under public highways or private lands pursuant to lease, easement, permit, municipal consent, tariff conditions, agreement or license, expressed or implied through use by Unitil Energy without objection by the owners. In the case of certain distribution lines, Unitil Energy owns only a part interest in the poles upon which its wires are installed, the remaining interest being owned by telecommunication companies.
The physical utility properties of Unitil Energy, with certain exceptions, and its franchises are subject to its indenture of mortgage and deed of trust under which the respective series of first mortgage bonds of Unitil Energy are outstanding.
Fitchburg’s electric substations, with minor exceptions, are located in north central Massachusetts on land owned by Fitchburg or occupied by Fitchburg pursuant to perpetual easements. Fitchburg’s electric distribution lines and gas mains are located in, on, or under public highways or private lands pursuant to lease, easement, permit, municipal consent, tariff conditions, agreement or license, express or implied through use by Fitchburg without objection by the owners. Fitchburg owns full interest in the poles upon which its wires are installed.
The Company’s natural gas operations property includes two liquefied propane gas plants and two liquid natural gas plants. Northern Utilities also owns a propane air gas plant and an LNG storage and vaporization facility. Fitchburg owns a propane air gas plant and an LNG storage and vaporization facility, both of which are located on land owned by Fitchburg in north central Massachusetts.
Northern Utilities’ gas mains are primarily made up of polyethylene plastic (84.8%) and coated and wrapped cathodically protected steel (15.2%). FG&E’s gas mains are primarily made up of polyethylene plastic (49.5%), coated steel (42.9%), cast iron (6.6%), bare steel (0.9%), and wrought and ductile iron (0.1%). Bangor’s gas mains are primarily made up of polyethylene plastic (70.2%), coated and wrapped cathodically protected steel (29.6%), and unprotected bare and coated steel (0.2%). Maine Natural’s gas mains are primarily made up of polyethylene plastic (89.4%), and coated and wrapped cathodically protected steel (10.6%).
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Granite State’s underground natural gas transmission pipeline, regulated by the FERC, is located primarily in Maine and New Hampshire.
The Company believes that its facilities are currently adequate for their intended uses.