More people are now taking part in bowel cancer screening.
Coverage is above the national average in both Surrey and Sussex, using the faecal immunochemical test (FIT), a home test that checks for blood in a stool sample.
Dr Charlotte Canniff, joint chief medical officer for Surrey and Sussex, said: "It is really positive that more people across Surrey and Sussex are taking up the offer of bowel cancer screening.
"Screening leads to quicker diagnosis and treatment if needed, and ultimately, leads to the treatment that can save lives."
Bowel cancer screening is offered every two years to people aged 50 to 74.
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Dr Canniff said: "If you are sent a bowel screening kit through the post, please do not ignore it or put it aside for later.
"Completing and returning it could help spot cancer early, before you have any symptoms, when treatment is more likely to be successful."
Coverage in Surrey Heartlands has risen from 72.0 per cent in 2021/22 to 75.4 per cent in 2024/25.
In Sussex, rates have also increased, climbing from 73.3 per cent to 75.3 per cent.
The England average for 2024/25 stands at 72.9 per cent.
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