Ted Grantham
Assistant Cooperative Extension Specialist
UC Berkeley Environmental Science, Policy & Management
portrait photograph
Ted studies the hydrology of rivers and its role in structuring freshwater ecosystems and sustaining habitat for aquatic species.



Polson, M., Butsic, V., Dillis, C., de Genova, H., Grantham, T., Herrera, L.R., Hossack, J., Laudati, A., Martin, J.V., Parker-Shames, P., Petersen-Rockney, M., Sorgen, J., Starrs, G.

This report presents multiple pathways for consideration by state and local governments, in their efforts to improve cannabis cultivation policy.


Polson, M., Bodwitch, H., Biber, E., Butsic, V., Grantham, T.


There are many barriers to participation in California's regulated cannabis industry. Is there a way to achieve environmental objectives, farmer compliance, and an equitable transition away from illegal markets?

photograph of a charred cannabis farm after a wildfire


Dillis, C., Butsic, V., Moanga, D., Parker-Shames, P., Wartenberg, A., Grantham, T.


Where should we grow? Explore the vulnerability of California's cannabis agriculture to wildfire.

Photograph of irrigation infrastructure on a cannabis farm. Includes storage tanks, pipes and fertilizer


Dillis, C., Butsic, V., Carah, J., Zipper, S.C. and Grantham, T.

Environmental Research Communications

Well water irrigates California’s top-producing cannabis farming regions. Why? What are the impacts?

outdoor grow within hillside forest


Dillis, C., Biber, E., Bodwitch, H., Butsic, V., Carah, J., Parker-Shames, P., Polson, M. and Grantham, T.

Land Use Policy

How has legalization shaped patterns of farm location, size, land ownership, and regulatory compliance in California?

Photo of Klamath River and forested hills where cannabis cultivation can impact water flows


Dillis, C., McIntee, C., Butsic, V., Le, L. Grady, K., & Grantham, T.

Journal of Environmental Management

What cultivation practices help cannabis farmers store enough water to eliminate surface water diversions during California’s dry growing season?

Macro-scale photograph of cannabis plant with webs of spider mites, a common pest.


Wilson, H., Bodwitch, H., Carah, J., Daane, K., Getz C., Grantham, T. E., & Butsic, V.

California Agriculture

Cannabis legalization opens opportunities to study and share best practices. Our survey of growers reveals starting points.

Photograph of a hillside cannabis grow site. The remains felled conifer trees lie on the right and the cleared grow site is steep. Two plastic water storage tanks sit on leveled ground.


Dillis, C., Grantham, T., McIntee, C., McFadin, B. & Grady, K.

California Agriculture

How does water use by cannabis farms affect streams in California's North Coast? Our study starts at the source.

Photo of cannabis plants growing outdoors in individual planters with irrigation and a forested background


Bodwitch, H., Carah, J., Daane, K. M., Getz C., Grantham, T. E., Hickey, G. M., & Wilson, H.

California Agriculture

Small cannabis farms are common. Permit licenses are not. A survey of grower incentives and economic implications of California's cannabis legalization.