Collinwood Water Hardness & Quality Report (2026)

Collinwood, Ohio, a neighborhood on the east side of Cleveland in Cuyahoga County — a historically significant Cleveland neighborhood (Collinwood has a complex history — it was a separate municipality until annexation by Cleveland in 1910, and was the site of the 1908 Collinwood school fire, one of the deadliest school fires in US history with 172 children and two teachers killed, which led to major national school safety reforms), historically a major Croatian-American and Italian-American neighborhood (Collinwood and the adjacent Lake Shore area had one of the largest Croatian-American communities in Ohio), a diverse Cuyahoga County community with a significant African-American and Latino-American population, and a northeast Cleveland lakefront neighborhood adjacent to Euclid — draws its municipal water supply via the Cleveland Division of Water. Water hardness in Collinwood measures 170 mg/L — classified as hard.

Collinwood's hard supply reflects the Cleveland Division of Water's Lake Erie supply and east side distribution characteristics. The Cleveland Division of Water draws from Lake Erie (raw hardness approximately 120–140 mg/L — calcareous from the Devonian limestone and Silurian dolomite watersheds of northwest Ohio). The east Cleveland Collinwood distribution zone (primarily 1910s–1950s older neighborhood mains) produces the hard 170 mg/L through distribution-zone accumulation.

At 170 mg/L, Collinwood residents face regular hard water challenges. Monthly descaling with citric acid solution is recommended. Cleveland Division of Water consistently delivers water meeting all Ohio EPA and federal EPA Safe Drinking Water Act requirements.