Water Quality | Subdivisions | Notice of Proposed Rulemaking | Comment Period Closes July 7, 2026 | Public Hearing July 7, 2026
MAR NOTICE NO. 2026-198.1
Implementing House Bill 923 (2025), which provides an exemption from background nitrogen sampling for wastewater discharges in areas where ground water is absent or at great depth; implementing Senate Bill 532 (2025), which allows 15-day expedited review for deviations from certificates of subdivision approval for adding an accessory dwelling unit (ADU) to a lot with existing public water and wastewater service that has capacity for the ADU; implementing House Bill 180 (2025), which allows the department to approve divisions of lots that have drainfield mixing zones on other people’s lots, under certain circumstances; and implementing House Bill 629 (2025), which directs the department to instruct county and municipal water and sewer systems to allow proposed subdivisions to connect to the systems under certain circumstances.
Associated Materials
Notice of Proposed Rulemaking - MAR Notice No. 2026-198.1
Public comments will be accepted starting June 5th, 2026 and ending July 7th, 2026 at 5pm. Comments must be submitted by 5pm MDT on July 7th, 2026 to the email address below:
A public hearing will also be held. See hearing information below:
Hearing Date and Time
Tuesday, July 7, 2026, at 11:00 a.m.
Hearing Information
Wilderness Room at 2401 Colonial Drive, Helena, Montana
Virtual Hearing Information
Interested parties may also attend the hearing electronically.
Please click the link below to join the webinar:
Join from PC, Mac, iPad, or Android:
https://mt-gov.zoom.us/j/87075909576?pwd=DjPAsLWIK6hPHcbCartGkVfdNVTWD7.1
Tags: Public Comment, Water, Public Meeting and Rule Making