Thames Water

Serves 15 million people across London and the Thames basin. Major rivers: Thames, Lee, Wey, Mole, Wandle.

Thames Water operates 577 monitored storm overflows. 12 monitors are offline. In the last 30 days the network has discharged a cumulative 9 days across 104 events on average. The Truth Engine has 13 open flags against them right now.

📍 View on national map →📄 Download Truth Report (PDF)⬇ Overflows · CSV

577

Storm overflows

Active right now

Monitors offline

Open flags

Spills · last 7 days

9 days

Cumulative discharge · 30 days

3.7 h

Avg event length · 30 days

Spills · last 24 hours

Most-discharged-into watercourses

The 12 watercourses with the most Thames Water overflows discharging into them.

River Thames59 overflows
River Roding30 overflows
River Lee27 overflows
River Brent15 overflows
River Wandle13 overflows
River Wey13 overflows
River Graveney11 overflows
Dollis Brook10 overflows
Groundwater10 overflows
River Mole10 overflows
River Thames (via the Tideway tunnel)10 overflows
River Evenlode7 overflows

Truth Engine flags against Thames Water· 13 open

Monitors offline· 12

TWL00715 · River Wandle3 days
TWL00230 · River Thames4 days
TWL00544 · River Lee8 days
TWL00784 · River Roding2 weeks
TWL00379 · Chaffinch Brook2 weeks
TWL00638 · Mayes Brook3 weeks
TWL00747 · River Wandle4 weeks
TWL00763 · River Lee6 weeks
TWL00788 · River Roding7 weeks
TWL00786 · River Roding11 weeks
TWL00109 · Ifield Brook2.3 years
TWL00150 · Darent / Dartford Creek2.5 years