Mike McGowan » Water Treatment Go back to directory. Mike McGowan McGowan Water Conditioning 401 Eleanor St PO Box 1239 Mankato MN 56001 work Work Phone: 507-388-3361work Work Email: mikem@mcgowanwater.comINTERNET Website: http://www.mcgowanwater.com Categories: Affiliates, Water Treatment Updated 3 years ago.