Health atlas of Wales and England shows risks by area
25 April 2014 Last updated at 20:00 BST
A new online map of Wales and England allows people to enter their postcode and find their community's risk of developing 14 conditions, such as heart disease and lung cancer.
Researchers at Imperial College London studied the risk of developing 14 conditions, including heart disease and lung cancer.
They found people in Bridgend and Rhondda Cynon Taf are more at risk of diseases like lung cancer and kidney disease.
Skin cancer was more of a risk in parts of Pembrokeshire and heart disease in some areas of Flintshire.
Prof Paul Elliott helped carry out the research and he spoke to Tomos Dafydd on BBC Wales Today.