All local authorities in Wales have seen an increase in Covid infection rates compared to last week.

The latest infection rate across Wales as a whole is now 523 per 100,000 people based on the seven days up to September 5.

WalesOnline has compared Public Health Wales data to see the places in Wales where the virus is spreading the most quickly. We compared the figures released on September 3 with seven days before.

Read more: What Mark Drakeford said about another Covid lockdown

These figures are seven-day rolling totals for new cases adjusted for population (per 100,000 people). It is important to remember that though these figures are a useful guide they are just part of the story. If testing massively increases in one place there is likely to be a rise in confirmed cases. However these figures are still a vital factor in Welsh Government and Public Health Wales decision-making.

It comes as Covid data shows that Merthyr Tydfil has the highest infection rate in Wales.

Below are the five areas where Covid are rising the fastest. You can read the latest information on all the areas with the highest coronavirus rates in Wales here.

Growing fastest

Carmarthenshire

This area has seen a 63% increase in just one week with several large outbreaks centred on Llanelli.

Caerphilly

The first area to go into local lockdown last autumn and now has an infection rate above 600.

Vale of Glamorgan

The Vale is the part of the Wales with the third fasted increase in the rate of Covid in Wales.

Bridgend

Bridgend has seen a 43% increase in Covid rates but at 486 it is just below Wales 523.

Flintshire

This area is the part of North Wales the the fastest growing Covid rates with a 40% increase in Covid rates.

This table shows the growth rates in every local authority:

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