The bill creates a new statutory requirement by adding a section to chapter 70A.15 RCW that requires owners or operators of dairy farms and feed lots to submit an annual report to "the department" showing total metric tons of methane emitted from the facility in the preceding calendar year. It defines "dairy farm" by reference to chapter 15.36 RCW and "feed lot" by reference to RCW 16.58.020, allows the first report to estimate annual emissions by using the average monthly emissions from any consecutive three-month period in the covered year, and directs the department to adopt rules to implement the section and to set a reporting schedule that gives reasonable lead time for the first report. Reporting begins on January 1 of the year after the department adopts implementing rules. The bill was read in the House on January 27, 2025, referred to the House Committee on Environment & Energy, and is designated H-0846.1 House Bill 1630 (69th Legislature, 2025). Legally, this is a new procedural reporting law, not a criminal or penalty change in the provided text: it imposes a new compliance and rulemaking requirement on specified agricultural operations. Important details are not included in the extracted text: the specific department named is not identified, the exact section number added to chapter 70A.15 RCW is not given, and the text does not specify rule details, reporting formats, verification or enforcement mechanisms, confidentiality or public disclosure of reports, or any penalties or consequences for noncompliance.

If enacted, owners and operators of licensed dairy farms and certified feed lots must start filing an annual report with the state showing total methane emissions in metric tons for the prior calendar year; the first report may be estimated by taking the average monthly emissions over any consecutive three-month period. Reporting begins January 1 of the year after the unnamed department adopts implementing rules and a schedule that provides reasonable lead time. In practice, affected farms will face new recordkeeping and likely measurement or estimation costs (staff time, possible monitoring equipment or consultants), and the responsible agency will need to spend time writing rules and running the reporting program. The bill does not identify which department will administer it, provide funding, specify measurement methods, state whether reports are public, or describe verification or penalties, so those important implementation and compliance details remain uncertain.