Pontprennau and Old St Mellons
WardNorth east Cardiff. About 12,638 people (mid-2024 estimate) in 8.6 square kilometres.
Radon Affected Area by ward
Worked out by Open Index · 2022
About 100% of people in Pontprennau and Old St Mellons live in a 1 km square that the radon atlas marks as a radon Affected Area.
How Pontprennau and Old St Mellons compares
Each dot is a ward. The black line marks the middle one.
Is Pontprennau and Old St Mellons safe? What police records show
In the 12 months to August 2026, police recorded crimes and anti-social behaviour in Pontprennau and Old St Mellons at a rate of 61.2 per 1,000 people.
That compares with 112.2 per 1,000 people across Cardiff.
Across Wales as a whole, the recorded crime rate was 96.7 per 1,000 people.
In August 2026 alone, 111 cases of crime and anti-social behaviour were recorded in Pontprennau and Old St Mellons.
In the 12 months to August 2026, the most common types were violence and sexual offences (237), other crime (194) and anti-social behaviour (117).
Worked out by Open Index from police.uk crime records and ONS and NISRA population estimates.
Rates are per resident, so places that many people work in or visit, such as Westminster, the City of London and other city centres, have far higher rates than their residents alone would suggest.
Figures for the whole of Cardiff
These figures are published for the whole of Cardiff, not for each ward, so they describe all of Cardiff and not Pontprennau and Old St Mellons alone. See Cardiff
Pontprennau and Old St Mellons in brief
Pontprennau and Old St Mellons had 11,713 usual residents at the census.
About 100% of people in Pontprennau and Old St Mellons live in a 1 km square that the radon atlas marks as a radon Affected Area.
In Pontprennau and Old St Mellons, 94.9% of homes and businesses could get gigabit-capable broadband in January 2026.
In Pontprennau and Old St Mellons, 2.4% of residents aged 16 to 64 were claiming out-of-work benefits in August 2026.