Castalia Local News: Topix
- Local, regional, and statewide news collected from diverse sources on the web.
- http://www.topix.com/city/castalia-oh

Margaretta Township Fire Department
- A department that provides fire, rescue and EMS services to the residents of Margaretta Township and the Village of Castalia. EMS is provided at both BLS and ALS levels.
- http://departments.firehouse.com/dept/Castalia2OH/

Blue Hole of Castalia
- Includes recollections on the bottomless pond.
- http://www.projex.demon.co.uk/bottom.html

Groton Fire Deparpment
- Presents overview of the department, personnel, and equipment.
- http://www.grotonfire.org/