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.
House Bill 176 (HB 176) revises Montana's wolf hunting laws, primarily affecting the Fish and Wildlife Commission, wolf hunters, trappers, and landowners. The bill mandates an unlimited statewide gray wolf hunting quota when the state's wolf population reaches or exceeds 450 wolves. Under this quota, the Commission must authorize multiple hunting licenses per applicant, allow an individual to harvest an unlimited number of wolves, permit the use of bait for hunting or trapping, and allow night hunting on private lands with artificial light or night vision scopes. It also requires consistent data modeling for wolf population estimates.
HB 658 would have limited local health boards' authority to create sanitation rules stricter than state standards, affecting communities that previously could enforce tougher local requirements. It specifically protected existing subsurface wastewater systems (like septic systems) from being subject to new local rule changes. The bill amended Montana law (sections 50-2-116 and 50-2-130) to remove local boards' ability to adopt more stringent sanitation regulations and to ensure current systems remain exempt from future rule updates. This change would have shifted regulatory authority toward state standards for wastewater and sanitation compliance.
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.
House Bill 258 (HB 258) aimed to revise laws concerning wolf hunting in Montana. The bill would have required the Fish and Wildlife Commission to authorize an annual wolf hunting season. Its main provision was to extend this wolf hunting season to conclude concurrently with the spring bear hunting season, allowing for specific regional adjustments by the commission. This legislation would have directly impacted wolf hunters and the state's wildlife management policies for wolves.
HB 935 allows the department to temporarily suspend or close new permit applications for large groundwater appropriations (3,000 gallons per minute or more) from specific areas within the Fox Hills-Hell Creek aquifer. This action aims to balance water development with the protection of existing water rights. The bill also mandates the Bureau of Mines and Geology to conduct a feasibility study on groundwater availability in these areas. It appropriates $5,000 for this study, and the act's provisions are set to terminate on June 30, 2027.
House Bill 932 revises laws related to funding for conservation efforts, primarily by reallocating a portion of the state's marijuana tax revenue. The bill establishes a new Habitat Legacy Account, which receives 20% of the net balance from the Marijuana State Special Revenue Account after an initial transfer. Funds from this Habitat Legacy Account are then distributed into three other new accounts. These accounts are dedicated to securing wildlife habitat, funding wildlife improvement projects, and supporting the design and construction of big game and wildlife highway crossings to enhance animal movement and safety. The Department of Fish, Wildlife, and Parks is responsible for administering these new accounts.
HB 685 establishes a "feasibility allowance" as part of the state's water quality nondegradation policy. This allows individuals or entities seeking to degrade high-quality state waters to request this allowance when working to meet water quality standards. The bill revises certain definitions, including expanding who is considered an "interested person" to include those requesting such an allowance. It also amends administrative rules and grants rulemaking authority to the Department of Environmental Quality to implement these new provisions, directly affecting industries and projects that impact state waters.
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 684 eliminates a specific deadline that previously required the Department of Environmental Quality (DEQ) to review data used for water quality assessments. This bill amends Section 75-5-702, MCA, removing the requirement for the DEQ to complete these data reviews within a set timeframe. This change primarily affects the DEQ's operational procedures for monitoring state waters and assessing their quality, as well as individuals and entities who submit water quality data for review.