Allen County Environmental Data
- Environmental information for developers.
- http://allen.osu.edu/

Allen Soil and Water Conservation District
- Promotes the wise use, improvement and maintenance of the soil, water and other natural resources in the County.
- http://www.allencounty.oh.nacdnet.org/

Allen County Ground-Water Resources
- Factsheet providing information on ground-water resources in the county.
- http://ohioline.osu.edu/aex-fact/0490_02.html

Water Resources of Allen County
- Factsheet providing information on water resources and drinking-water quality in the county.
- http://ohioline.osu.edu/aex-fact/0480_02.html