Greater Cincinnati Water Works (GCWW) has been a municipally owned and operated utility since it was purchased by the City of Cincinnati in 1839.

GCWW has always taken the lead in water quality research and technology to protect public health. We have been featured nationally for our state-of-the-art water treatment and research. To ensure the highest quality drinking water, we test the water more than 600 times a day from the source through treatment and in the distribution system.