Butler County Environmental Data - Environmental information for developers. Linked from Ohio State Univ. Extension. ohioline.osu.edu/cd-fact/en_butl.html
Butler County Ground-Water Resources - Factsheet providing information on ground-water resources in the county. Linked from Ohio State Univ. Extension. ohioline.osu.edu/aex-fact/0490_09.html
Butler 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.butlercountyohio.org/conservation
Butterflies of Butler County - Presents photos and species accounts of butterflies found within the county. www.npwrc.usgs.gov/resource/distr/lepid/bflyusa/chklist/states/counties/oh_17.htm
Water Resources of Butler County - Factsheet providing information on water resources and drinking-water quality in the county. Lnked from Ohio State Univ. Extension. ohioline.osu.edu/aex-fact/0480_09.html
