The handle Ofwat permits it to take forward a number of plans at Coppermills and Hampton water treatment works.
Functions will include changing aging facilities and constructing brand-new treatment abilities.
The complete program of work is because of end up by January 2032.
Esther Sharples, primary running officer at Thames Water, stated: “It's crucial that we construct strength and buy significant facilities, so that we can satisfy the obstacles ahead.
“As the population of London boosts and we experience hotter and drier summertimes, we continue to see the need for water grow.
“Investing in the condition of our properties is core to our ongoing turn-around and our prepared upgrades will indicate better water security for countless Londoners.”
Thames Water will supply routine updates to Ofwat on its development in providing its essential job turning points.
