Monitoring the environment

About EPA AirWatch


EPA AirWatch is a map that shows air quality information measured by EPA’s air monitoring stations around Victoria. Data at each location is updated each hour. To get the most from EPA AirWatch, we recommend you first visit How to use EPA AirWatch.

Air monitoring information is also available at the hourly air quality data table.

On occasion, data may not show on the map below for a variety of reasons, such as monitoring station maintenance, equipment breakdown or website issues. See current notices for the EPA AirWatch map.

During winter months, EPA switches off equipment that we use to monitor summer ozone in parts of our network (mostly in metropolitan Melbourne). We will switch them back on before the start of next summer.

NATA accreditation of EPA’s air monitoring methods

EPA is accredited by the National Association of Testing Authorities (NATA) to use a number of different methods and techniques to measure and report on ambient air quality.

EPA’s NATA accreditation number is 15119.

Methods and techniques EPA uses to collect air monitoring data

Parameter Australian Standard NATA-accredited*
Siting AS 3580.1.1 Yes
TEOM (PM10) AS 3580.9.8 Yes
Nephelometer AS 3580.12.1 Yes
BAM (PM2.5) AS 3580.9.12: 2013 No
ADR (PM2.5 indicative) No
Meteorological (wind speed and direction) AS3580.14 Yes
CO AS 3580.7.1 Yes
O3 AS 3580.6.1 Yes
SO2 AS 3580.4.1 Yes
NOx AS 3580.5.1 Yes
High Vol (PM10)** AS 3580.9.6 No**
Partisol (PM2.5)** AS 3580.9.10 No**

* A ‘Yes’ in this column means that EPA has NATA accreditation for that specific air monitoring technique or method.

** This work is currently performed by a contractor (Golder Associates P/L, NATA accreditation number 1910) using EPA sites and equipment.

Locations of EPA’s air monitoring stations

The locations of EPA’s ambient monitoring stations provide a good representation of the air quality experienced by the public. For example, most of the Victorian population lives and works close to roads, which is why most of our air monitoring stations are located in population centres next to roads.

The Australian standard for siting (AS 3580.1.1) specifies that air monitoring stations should be more than 50 metres away from a road. Currently, the Footscray air monitoring station is the only EPA air monitoring site that meets this requirement.

Page last updated on 21 Nov 2016