Butterflies of Union County - Presents photos and species accounts of butterflies found within the county. www.npwrc.usgs.gov/resource/distr/lepid/bflyusa/chklist/states/counties/oh_159.htm
Union 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. www.co.union.oh.us/soil-water-conservation
Water Resources of Union County - Factsheet providing information on water resources and drinking-water quality in the county. ohioline.osu.edu/aex-fact/0480_80.html
