The Colne Valley Water Company Plc was a statutory water company supplying parts of South West Hertfordshire from 1873 to 1994.[1][2][3] In 1994 it merged into Three Valleys Water.[3][4]
It was the successor to smaller local water companies such as the Abbots Langley Water Company,[5] and reached its final size when it acquired the Watford Corporation's water undertaking in 1973.[3]