National Air Quality Strategy
Table of objectives
There are three stages involved in assessing air quality under the National Air Quality Strategy. So far the review and assessment has concentrated on identifying the major sources of a number of common pollutants and assessing whether specific Air Quality Objectives will be achieved by the year 2005, as required by the National Air Quality Strategy.
Table showing the Air Quality Objectives.
| Pollutant | Standard & Objective | Measured as | Date to be Achieved by |
| Benzene | 16.25ug/m3 5ppb | Running annual mean | 31 Dec 2003 |
| 1,3-Butadiene | 2.25ug/m3 1ppb | Running annual mean | 31 Dec 2003 |
| Carbon monoxide | 11.6ug/m3 10ppm | Running 8-hour mean | 31 Dec 2003 |
| Lead | 0.5ug/m3 | Annual mean | 31 Dec 2004 |
| Lead | 0.25ug/m3 | Annual mean | 31 Dec 2008 |
| Nitrogen dioxide* | 200ug/m3 105ppb (not to be exceeded more than 18 times a year) | 1-hour mean | 31 Dec 2005 |
| Nitrogen dioxide* | 40ug/m3 21ppb | Annual mean | 31 Dec 2005 |
| Particles (PM10) | 50ug/m3 (not to be exceeded more than 35 times a year) | 24-hour mean | 31 Dec 2004 |
| Particles (PM10) | 40ug/m3 | Annual mean | 31 Dec 2004 |
| Sulphur dioxide | 266ug/m3 100ppb (not to be exceeded more than 35 times a year) | 15-minute mean | 31 Dec 2005 |
| Sulphur dioxide | 350ug/m3 132ppb (not to be exceeded more than 24 times a year) | 1-hour mean | 31 Dec 2004 |
| Sulphur dioxide | 125ug/m3 47ppb (not to be exceeded more than 3 times a year) | 24-hour mean | 31 Dec 2004 |
* the objectives for Nitrogen Dioxide are provisional.
