About Us Founded by Earl C. Hempy out of his home at 505 Smith Street in Forest, Ohio more than half a century ago, Hempy Water has been providing residential and commercial water treatment solutions for the entire Northwest and Central Ohio region. Today it continues to offer unsurpassed service, expanding beyond basic water softeners and water conditioners to state-of-the-art water refiners, reverse osmosis drinking water systems, carbon filtration, de-chlorination, ozone applications and a host of water purifiers for residential and commercial usage.