Identification of and treatment information for Japanese Knotweed sites in West Marin County, CA. This work is performed by the Marin Knotweed Action Team (MKAT), in conjunction with the UC Cooperative Extension. Data is collected annually beginning in 2018.

Japanese Knotweed is a fast growing, invasive weed that can be suppressed over multiple successive years of treatment.

MKAT is a coalition of various land managers (comprised of local, state and federal agencies and non-profit organizations) who are dedicated to sustaining the vibrant and resilient Lagunitas Creek and San Geronimo Creek watersheds, specifically the control and long-term eradication of Japanese Knotweed from these areas.

Treatment Details Column Description:
"Not Treated" -The reasons for not treating may vary, it could be due to the owner of the property declining a treatment or a treatment is planned for a future date, or this is a new site that will have a future treatment.

"Monitoring" -This is an area that has been treated in the past but is monitored for future knotweed occurrences.

"Treated in Year" -The area has been treated in the current year