PM10 results for Reefton have consistently exceeded the Resource Management (National Environmental Standards for Air Quality) Regulations 2004 since continuous monitoring began at the site in 2006.
The 2011 review of the Resource Management Regulations introduced split target compliance dates depending on the state of air quality in each airshed.As the Reefton airshed has consistently had more than ten exceedences a year, the regulations now state that there must be no more than three exceedences per year by September 2016 and no more than one exceedence per year by September 2020.