People with lung or heart disease are being warned high levels of pollution could worsen their condition.
Environment chiefs issued a second warning on Tuesday evening about high pollution levels in the northwest that saw harmful particulate matters PM10 and PM2.5 hit 61 and 64 µgm-3 respectively at the city’s Rosemount air monitoring station.
For PM2.5s, which can cause cancer, COPD, coronary heart disease and stroke, that’s over four times the 24-hour average exposure the World Health says should not exceed 15 µg/m3 and almost a third higher than the 45 μg/m3 24-hour mean advised for PM10s.