THE Welsh Government has denied misleading the public over the impact of clean air zones on the roads in some of Wales’ most polluted areas.

On Monday, the Welsh Government announced that, since the schemes were introduced in 2018, they have made “significant progress” in lowering the levels of nitrogen dioxide in affected areas by “up to 47 per cent”.

Deputy minister for climate change, Lee Waters, who has a responsibility for transport said: “It’s clear that the speed restrictions we’ve introduced on our most polluted roads are working - the results speak for themselves – but compliance with these limits is essential if we are to achieve the reductions we need to make in the shortest possible time.”

READ MORE: Drivers could be fined for exceeding 50mph in air quality zones

However, the minister did not mention how or if significantly lower traffic levels throughout last year as a result of the coronavirus lockdowns had contributed to the figures.

When asked by the if it was misleading to omit this, a Welsh Government spokeswoman told our sister paper, the South Wales Argus: “The pandemic has had an impact on reducing the levels across all five locations but this alone does not explain the significant reduction in nitrogen dioxide levels measured.”

The Welsh Government was unable to provide data on the number of vehicles using the M4 at Newport, and how this was affected by the coronavirus lockdowns.

The National Wales: Air pollution levels in clean air zones in Wales. Data: Welsh Government.Air pollution levels in clean air zones in Wales. Data: Welsh Government.

According to the Welsh Government figures, the levels of air pollution on the M4 in Newport – between junction 24 for Coldra and junction 28 for Tredegar Park – had fallen by 6.77 per cent from when the 50mph speed limit was introduced in 2018 to 2019.

However, in 2020, that figure fell to 39.53 per cent lower than in 2018.

In the other 50mph clean air zones, the A494 at Deeside saw the lowest reduction between 2018 and 2020 – with the concentration of nitrogen dioxide falling by 37.2 per cent.

The M4 at Port Talbot saw a 41.74 per cent fall from the 2018 figure, while the A483 at Wrexham saw a drop of 45.22 per cent.

And the A470 at Pontypridd saw a 46.3 per cent reduction the mean concentration of nitrogen dioxide compared to in 2018.

The Welsh Government said the speeding fines, which are to be brought in on the M4 at Newport from October 4, will lead to improvements in the air pollution levels across the clean air zones.

“The enforcement measures being introduced from October 4 will help ensure drivers continue to comply with the reduced speed limit so we can achieve improvements in air quality in these areas,” said a Welsh Government spokeswoman.

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