Butterflies of Delaware County - Presents photos and species accounts of butterflies found within the county. www.npwrc.usgs.gov/resource/distr/lepid/bflyusa/chklist/states/counties/oh_41.htm
Delaware County Ground-Water Resources - Factsheet providing information on ground-water resources in the county. ohioline.osu.edu/aex-fact/0490_21.html
Delaware County Water Resources - Factsheet providing information on water resources and drinking-water quality in the county. ohioline.osu.edu/aex-fact/0480_21.html
Delaware Soil and Water Conservation District - Agency responsible for protecting the natural resources within the county that assists landowners in planning and applying conservation practices on their land. Includes list of programs. www.delawareswcd.org
