Christopher Dillis
Postdoctoral Reseacher
Department of Environmental Science, Policy, & Management
portrait photograph
Christopher's research explores how cannabis farms use water, how they are regulated, and what the consequences are for freshwater resources.


photograph of a circular lined pond, full of water, on a forested slope


Dillis, C., Butsic, V., Georgakakos, P., Portugal, E., Grantham, T.

Environmental Research Communications

Water use on unpermitted farms varies by watershed. With scenario modeling, we project the impacts of compliance with water extraction and off-stream storage.


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.

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?

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.