The operation involving more than 300 officers was part of a long term crackdown on the supply of drugs, violence and associated crime, officials said.
Those arrested – 22 men and one woman, aged between 19 and 44 - remain in custody at west London police stations pending further enquiries, police said this afternoon. Class A and Class B drugs were seized.
The raids “signal the penultimate phase of a long running operation by police to target drug dealers operating in the area, along with associated offending such as knife crime, other violence, burglary, theft and anti-social behaviour”, the Metropolitan Police Service said in a statement.
Detective Chief Inspector Helen Flanagan, of Hounslow CID, said: “We will continue to disrupt and dismantle crime, safeguard our community and locate and prosecute those people who inflict misery on them.
"By targeting drug dealing we can continue to have a positive and long term impact on related crimes such as knife crime, violent and acquisitive crime and on the quality of life of our communities.
"The support of our community is essential to achieve positive change and I would like to thank those in our community for providing that ongoing support to us. I hope they can see that our actions, in conjunction with the Local Authority, show we do act on their concerns."