Ohio takes an active roll in ensuring the quality of their public drinking water. Leaking septic systems contribute a significant amount of nitrates to the public drinking water supply. While nitrates are harmless to most, children under 6 months can experience health risks from excessive amounts. See Ohio EPAs fact sheet on Nitrates in Public Drinking Water.
The Ohio Department of Health has put together an excellent reference for contacting your county department of health office. State issued permits are required prior to installation of new septic systems, or any modification of existing systems. Homeowners are urged to take necessary precautions to ensure their system is up to date, and regularly inspected and pumped by licensed contractors.