SB 473 prohibits most weather modification activities in Montana, specifically banning large-scale "geoengineering" projects like spraying particles into the atmosphere to alter climate (e.g., stratospheric aerosol injection or marine cloud brightening). It exempts established cloud seeding practices used for agriculture and snowmaking under existing law (85-3-101 through 85-3-424). The bill directly affects researchers, companies, or entities conducting weather-altering experiments within Montana’s borders. Key provisions ban intentionally releasing chemicals or devices for weather control, temperature modification, or sunlight intensity changes, except for permitted cloud seeding. The law takes immediate effect upon enactment.
HB 57 would amend Montana law to officially include California quail and Gambel's quail in the state's definition of "upland game birds" under Section 87-2-101, MCA. This change would directly affect hunters and wildlife managers by adding these quail species to the list of birds subject to regulated hunting seasons, bag limits, and conservation practices already applied to birds like pheasants and grouse. The bill specifically updates the legal definition without altering hunting seasons or regulations, ensuring these quail would be managed under existing upland game bird frameworks. The bill was introduced by request of the Environmental Quality Council but died in process on May 22, 2025.
HB 326, titled the "State Energy Resource Severance Act," would establish a new 10% tax on the sale price of electrical energy produced in the state. This tax would apply to electricity generated from sources such as water, wind, and solar, but specifically exempts coal-fired electrical generation. The bill also reduces the existing coal severance tax rate to match this new electrical energy production tax rate. Revenue from this new tax would be allocated to special accounts, primarily for local government infrastructure projects traditionally funded by coal.
HB 139 aimed to revise laws related to mule deer buck hunting in Montana, directly affecting hunters and the state's Fish, Wildlife & Parks commission. The bill would have restricted the commission's ability to close mule deer buck hunting during the general rifle season in November. Specifically, it would have prohibited closures in more than 20% of hunting districts per season, for more than two years within a six-year period in any district, or prior to November 6 in any district. These new restrictions would not have applied to any district closures already in place before December 1, 2024.
HB 101 reclassifies gray wolves as furbearers, integrating them into existing furbearer hunting and trapping regulations. The bill establishes specific wolf hunting licenses for residents and nonresidents, outlining associated fees and tagging requirements for harvested wolves. It introduces new management provisions, allowing for more liberal harvest opportunities such as multiple licenses per individual, the use of bait for trapping, and night hunting on private lands. Additionally, the bill permits landowners to take wolves threatening human safety, livestock, or dogs on their property without a license under specific reporting requirements and a quota.
HB 923 directs the Montana Department of Environmental Quality (DEQ) to amend its administrative rules by January 1, 2026. This amendment will create a new categorical exclusion from nondegradation authorization requirements. This exclusion applies to areas where a county commission demonstrates it has prohibited drinking water wells and ensures absorption trenches are at least 1,000 feet from downstream high-quality surface waters. The bill also appropriates $10,000 to the DEQ to implement these rule changes and provide guidance.
HB 55 revises the laws governing how public utilities plan for their customers' future energy needs. It requires public utilities to submit detailed resource plans every three years, including evaluations of renewable energy and demand-side management scenarios, and to hold more public meetings before submitting these plans. The bill establishes a special revenue account within the Department of Environmental Quality to fund an independent evaluator, paid for by fees charged to public utilities, who will assist in reviewing these plans. Additionally, the state commission can now engage independent consultants to evaluate utility plans, with these costs being recoverable in rates charged to customers.
HB 587 revises existing mine reclamation laws. The bill updates the definition of "material damage" and clarifies the hydrologic and geologic information required for mining permits. It grants rulemaking authority to the Department of Environmental Quality and amends specific sections of state law. These changes impact mining operations by adjusting the regulatory framework and definitions used for reclamation activities.
HB 736 establishes a system for nutrient pollutant loading offsets for facilities holding water quality discharge permits. It allows these permitted dischargers to meet their nutrient discharge limits by reducing nutrient pollution from other sources within the same watershed, including both direct discharge points and diffuse sources. The bill specifies varying offset percentages based on the type and location of the pollution reduction. It directs the state's environmental department to establish statewide offset values for various nonpoint pollution reduction projects, such as riparian fencing or wetlands development, and to amend existing policies to implement these provisions.
HB 703 exempts specific state and local agencies in Montana from analyzing greenhouse gas emissions during certain environmental reviews. The bill states that the state department and local building departments are no longer required to analyze greenhouse gas emissions from covered appliances when adopting or enforcing building codes. It also exempts the state department from analyzing greenhouse gas emissions from new motor vehicles, engines, and nonroad vehicles, and emissions originating outside the state's borders. The bill cites federal preemption laws as the basis for these exemptions from environmental review.