SB 340, introduced by Senator D. Zolnikov, would have revised Montana’s environmental law by adding a $240 fee for filing lawsuits challenging agency decisions under the Montana Environmental Protection Act (MEPA). It would have required plaintiffs to cover agency costs for preparing records, limited follow-up lawsuits to new issues only, and prohibited courts from awarding attorney fees or costs to winning plaintiffs. The bill directed the $240 fee to the state’s environmental rehabilitation account, which funds mine reclamation and hazardous waste cleanup. However, the bill died in committee in May 2025 and never became law.
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.
SB 209 limits conservation easements to a maximum term of 40 years (previously allowing perpetual terms), amending Montana law to require renewal for additional periods. It directly affects landowners who use conservation easements, prohibiting restrictions on agricultural activities for lands used for farming within the past decade and banning land conversion to federal control under such easements. Key provisions include revising definitions of "conservation easement" and "open-space land," and ensuring property tax assessments reflect the land's restricted use without lowering valuation. The bill does not change existing permitted easement restrictions (like limiting construction or development) but adds specific protections for agricultural use and landowner control.
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.
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 26, titled "Repeal mercury thermostat collection act," eliminates the existing Mercury-Added Thermostat Collection Act. This bill removes state requirements that prohibited the sale and installation of mercury-added thermostats. It also discontinues mandates for manufacturers to operate collection and recycling programs, for wholesalers to provide collection sites, and for related education, outreach, and annual reporting. The repeal of these specific sections of the Montana Code Annotated removes these environmental regulations concerning mercury thermostats.
HB 346 exempts various grant and loan programs from environmental review requirements under the Montana Environmental Policy Act (MEPA). This bill directly affects the Department of Commerce, Board of Housing, and other commissions by removing the need for environmental assessments when authorizing or administering these specific programs. The exemptions apply to programs supporting microbusiness development, historic preservation, workforce training, housing finance, and other economic development initiatives. This aims to streamline the process for providing financial assistance through these identified programs.
SB 262 exempts certain water and sewer system plans, along with specific subdivision applications, from environmental review requirements. The bill removes the obligation for the state department to conduct environmental reviews for water or sewer system plans. Additionally, it removes the requirement for local governments and independent reviewers to comply with the Montana Environmental Policy Act when reviewing small public water and sewer systems or subdivisions connecting to existing municipal systems. This change aims to streamline the approval process for these types of projects.