Bowling Green Water Hardness & Quality Report (2026)

Bowling Green, Ohio, the Wood County seat — a major northwest Ohio university city (Bowling Green is the Wood County seat and home of Bowling Green State University — a significant Ohio public research university with over 17,000 students; BGSU is particularly known for its programs in business, education, and popular culture studies (BGSU has one of the only departments of Popular Culture in the United States)), a diverse Wood County community with a primarily university, working-class, and suburban professional population, home of the BGSU Ice Arena (one of the most important collegiate ice hockey facilities in the Midwest — BGSU is a perennial contender in the CCHA), adjacent to the Maumee River Valley and the Great Black Swamp drainage region (Bowling Green is in the former Great Black Swamp — one of the largest inland freshwater wetlands that once existed in North America, drained for agriculture in the 19th century), and a mid-size northwest Ohio university city — draws its municipal water supply from the Silurian Dolomite aquifer via the City of Bowling Green Water Division. Water hardness in Bowling Green measures 155 mg/L — classified as hard.

Bowling Green's hard supply reflects the Wood County northwest Ohio Silurian dolomite aquifer's calcareous character. The Niagaran and Bass Island Dolomite aquifer at Bowling Green–Wood County draws from the Silurian Niagaran Dolomite and Devonian Bass Island Group (highly calcareous dolomite). City of Bowling Green applies limited softening, producing the hard 155 mg/L.

At 155 mg/L, Bowling Green residents face regular hard water challenges. Monthly descaling is recommended. City of Bowling Green Water Division consistently delivers water meeting all Ohio EPA and EPA Safe Drinking Water Act requirements.