​State capitols have quietly become the most important venue for networked ground source heat pump deployment. Thermal energy network legislation now determines who may own a shared ground loop, who must study one, and how quickly a pilot has to break ground. Fourteen states have already put something on the books.

Tracking it is harder than it looks. Bills rarely carry the same name twice, and the important provisions often sit buried inside omnibus energy packages. Here is a practical map of what is moving and what to watch.

Why Thermal Energy Network Legislation Varies So Much by State

There is no federal template. Each state grafts thermal energy networks onto whatever utility statute it already has, so the legal mechanics look completely different from one border to the next.

Gas-heavy states tend to rewrite definitions. Massachusetts changed its definition of a gas company so utilities can sell and distribute non-emitting thermal energy, and modernized the obligation to serve so a utility can supply thermal service instead of gas. Colorado took a standards route instead. Its 2023 Thermal Energy Act lets networks count as an acceptable clean heat measure toward utility greenhouse gas obligations.

Other states skip utilities entirely. Vermont's S.305 allows municipalities to form thermal energy utilities without Public Utility Commission approval, much like water and sewer. Texas went further sideways, amending its Local Government Code to designate networks as public improvement projects eligible for special-purpose district financing.

That variety matters for anyone designing or bidding work. The statutory path decides who holds the contract and who carries long-term responsibility for the shared loop serving multiple buildings.

Four Policy Models Showing Up in State Bills

Once you strip away the naming conventions, most enacted laws fall into one of four buckets. Many states combine two or three.

• Ownership authority. These laws expand who may own and operate network infrastructure. Maryland's WARMTH Act allows gas, water, and electric utilities to own, manage, and recover costs for thermal energy networks with regulatory approval.
• Pilot mandates with deadlines. Washington's HB 2131 created a gas utility pilot program requiring proposals within 12 months and construction within 30 months. Deadlines like these create real procurement windows.
• Study commissions and feasibility screening. Maine's LD 1619 established a 13-member commission to evaluate technical feasibility, grid benefits, and funding. New Jersey directed its Board of Public Utilities to study large-scale heat pump systems and consult peer states.
• Financing and district authority. Illinois used its 2025 grid bill to route Climate Bank support toward network pilot projects, with project labor agreements required for construction.

Reading which bucket a bill sits in tells you a great deal about timing. Study bills signal work two or three years out. Pilot mandates signal work now, and they surface ownership questions on network projects almost immediately.

States to Watch in the Current Session

New York remains the anchor. Its 2022 Utility Thermal Energy Network and Jobs Act let gas and electric utilities build, own, operate, and sell thermal energy, and utilities responded with more than a dozen pilot proposals. Advocates are now pushing for expanded state funding alongside ongoing commission proceedings.

Rhode Island is the newest entrant. Its 2026 Thermal Energy Network and Jobs Act requires larger regulated utilities to identify pilot sites and conduct feasibility studies, and creates an 11-member task force to evaluate them. Colorado also kept iterating. SB 26-142 gives municipalities broad authority to finance, construct, own, and operate networks, and allows regulated utilities to count emissions reductions from a network they neither own nor financed.

Massachusetts and Minnesota both have active proposals in play. Massachusetts filed an energy affordability and competitiveness bill in February 2026 containing network provisions. Watch these alongside the licensing and continuing education requirements that differ state to state, since the two often move on separate tracks.

How to Read Thermal Energy Network Legislation Like a Contractor

Skip the press release and go to the definitions section first. Definitions decide whether your project qualifies. Then check three things.

Look at the ownership boundary. Some laws stop at the meter, and others cover in-building work. Next, find the labor provisions. Rhode Island requires 15 percent apprentice labor hours on larger projects in the public right-of-way, and Maryland attached prevailing wage and apprenticeship requirements to both front- and behind-the-meter work. Finally, find the deadline. A construction clock tells you when crews need to be certified, not when the bill passed.

That last point is where thermal energy network legislation becomes a workforce problem rather than a policy problem. Loop field quality determines whether a network performs for 50 years or longer. IGSHPA tracks this gap through its market capacity work and through resources on utility-owned network models reshaping the industry.

Get Your Crew Certified Before the Bids Land

If your state just passed a pilot mandate, your hiring window is already open. You do not have years. Utilities and their engineering partners are looking for designers, installers and drillers who can document their professional qualifications on day one. That is exactly what IGSHPA certification is built to demonstrate.

Our training and certification programs prepare your team for the technical scrutiny these projects attract, and membership connects you to the utilities and manufacturers driving the pilots. Ready to position your company for the networked projects coming to your state? Reach out to our team and we will help you map the right training path.