The rules on data centers in New Hampshire
We hold no state-level policy event for New Hampshire. That is our coverage, not a finding: it means nothing has crossed our sources, not that nothing is happening. 1 interconnection deadlines bind projects in this state. As of 15 September 2026.
In plain words
Nothing has reached us about New Hampshire changing its rules for data centers. That means nothing has crossed our sources — not that nothing is happening. See where they are in New Hampshire, or check your own address.
What is on file for New Hampshire
Nothing state-specific for New Hampshire has reached our sources. Our policy tracking is deliberately narrow — moratoriums, large-load tariffs, siting rules and interconnection reform — and it is not a substitute for a legislative tracking service. If you know of something we should hold, tell us and it goes in with its source.
Key dates for projects here
1 dated · next closes 2026-11-19 (ISONE)
| Queue | What closes | Closes | Standing |
|---|---|---|---|
| ISONE | ISO-NE cluster request window Cluster study under OATT Schedules 22, 23 and 25. | 2026-11-19 | confirmed source |
| FERC | FERC large-load show cause — stakeholder comments on RTO responses Comments on the six RTO/ISO responses to the FPA section 206 show-cause orders of 18 June 2026 (PJM EL26-67, SPP EL26-68, NYISO EL26-69, MISO EL26-70… | No date published yet | unconfirmed source |
| FERC | FERC RM26-4 — generic large-load rulemaking Still at ANOPR stage. | No date published yet | confirmed source |
| FERC | Georgia PSC - Georgia Power must file large-load contracts 30 days before execution A standing obligation rather than a dated one: large-load contracts must be filed with the commission at least 30 days before they are executed. | No date published yet | confirmed source |
A date marked confirmed was checked by a person against the authority's own tariff, order or form page. Anything else is listed so you know it exists, with a link so you can check it yourself. Full calendar.
Federal decisions, which apply everywhere
6 items
| Date | What happened | Status |
|---|---|---|
| 2026-08-12 | DOE cancels all three remaining proposed NIETC transmission corridors Lake Erie–Canada, Southwestern Grid Connector, and Tribal Energy Access corridors cancelled; the federal corridor-designation framework is dead. State siting is now the whole game. source | final |
| 2026-06-18 | FERC §206 show-cause orders to all six RTOs on large-load integration (EL26-67 through EL26-72) Every RTO/ISO must justify or reform its large-load interconnection rules. PJM (EL26-67) responses due 2026-08-17; comments due 2026-09-16. Compliance filings will become a primary structured source of load-queue transparency. source | open |
| 2026-03-01 | FERC further guidance on co-located load interconnection (EL25-49 line of cases) Follow-on to the Talen–Susquehanna ISA rejection (ER24-2172) and the PJM co-location show-cause; sets the frame for behind-the-meter data centers at generators. source | open |
| 2026-02-12 | EIA-860S emergency-approved: state air-permit inventory of >1 MW backup generators New collection motivated by AI data centers; backup-genset permits are the best forthcoming government proxy for data-center locations. EIA also running voluntary DC pilot surveys in TX, WA, NoVA. source | in-effect |
| 2025-10-23 | FERC opens RM26-4: Interconnection of Large Loads to the Interstate Transmission System DOE §403 directive forced an expedited rulemaking on large-load interconnection (large load defined >20 MW). ANOPR concepts: 60-day studies, cost allocation, co-location reliability rules. source | open |
| 2024-05-13 | Order 2023/2023-A generator interconnection reform — cluster transitions ongoing All ISOs moved to cluster studies with readiness deposits; PJM transition cycles TC1/TC2, ISO-NE first cluster 2026, CAISO Cluster 15. Reshapes every queue metric on this dashboard. source | implementing |
Which counties in New Hampshire this is happening in
top 7 by power requested
| County | Waiting to connect | Capacity queued |
|---|---|---|
| Rockingham County | 1 | 100 MW |
| Sullivan County | 1 | 5 MW |
| Cheshire County | 0 | 0 MW |
| Coos County | 0 | 0 MW |
| Grafton County | 0 | 0 MW |
| Hillsborough County | 0 | 0 MW |
| Merrimack County | 0 | 0 MW |
Before you commit to a site in New Hampshire
A county report puts the policy position, the queue and the deadlines for one county in a sourced PDF, with the date each figure was true on every page. The first one is free.
Get a free county report New Hampshire interconnection queue The deadline calendar