Seven hundred megalitres a day That’s how much water Hampton Water Works pumps out. Can you imagine?
This impressive water treatment works sits on the banks of the River Thames in Hampton London. It’s been providing London with fresh water since the 1850s. Its history is deeply intertwined with the city’s growth and its need for clean drinking water. Built by three water companies it was a response to the Metropolis Water Act of 1852. This act forbade taking drinking water from the polluted tidal Thames below Teddington Lock.
The original design included sand filter beds and three magnificent engine pump houses. These brick structures with their arched windows and decorative balustrades still dominate the landscape. They were designed by Joseph Quick and J W Restler. The works expanded throughout the late 19th century adding filtration water storage and more pumping capacity. The last engine house was completed in 1900. By then Hampton Water Works was one of the largest in the world. It required over 100 tons of coal daily. This coal arrived by barge then later via a dedicated railway line to avoid delays.
Think of the sheer scale of the operation. The Hampton Water Works even has its own siren. This isn’t some modern emergency alarm. It’s a repurposed World War II air raid siren. It’s tested every Tuesday morning and is audible throughout Hampton and Molesey. It serves as a reminder of the works’ continued importance. Now owned by Thames Water it continues to supply about 30% of London’s fresh water. A vital part of the city’s infrastructure.
Over time the Hampton Water Works has expanded and evolved. It receives water from various sources including the Staines Reservoirs Aqueduct. This aqueduct brings water from the King George VI Reservoir and other reservoirs. The water travels through tunnels. It reaches the Hampton works and then travels onward. It is transferred to reservoirs in the Lea Valley. The Hampton Water Works is a fascinating glimpse into London’s history. It’s a crucial part of the city’s present and future.