Pennsylvania DEP does not regulate private homeowner wells statewide, so county and local rules matter. Confirm the scope before drilling, altering, or abandoning a well.
Official source: Pennsylvania DEP — Private Water Wells ↗Montgomery County requires an Office of Public Health permit before installing a drinking-water, irrigation, or geothermal well. Its process includes an on-site installation inspection plus completion and pump-test documentation.
Official source: Montgomery County OPH — Individual Water Supply Well Permitting ↗