NSW air was cleaner in 2014

NSW was breathing easier last year, with monitoring stations around the state showing a marked improvement in air quality compared to 2013.

The cleaner air came despite below average rainfall, especially in the north-east, and 2014 being the state's hottest year on record.

Office of Environment and Heritage spokesman Matt Riley said the findings came from 43 monitoring stations across NSW.

"Analysis across the state in 2014 shows that air quality in NSW was better than the very smoky, dusty year we had in 2013," Mr Riley said.

"We still had some days with poor air quality, but overall the skies were clearer."

The air quality index in Sydney was classified as "very good" or "good" on 233 days (64% of the time) and "fair" on 89 days (24%).

It was deemed "poor" on 43 days (12% of the time), mostly associated with smoke from bushfires and hazard reduction burns.

The air quality for the vast majority of the state was rated "very good", "good" or "fair" for almost 100% of the time.