Claims that industrial pollution from Cockburn Cement causes asthma and other health problems are to be examined by a Parliamentary inquiry.
The inquiry will also investigate dust, odour and other alleged health issues.
Residents who live near the plant have argued for years that they have been plagued by health problems due to pollution from the site.
Studies have shown that winds from the site blow over thousands of houses in suburbs including Munster, Beeliar, Yangebup, South Lakes, Jandakot and Success.
Despite this, company officials claim testing shows their emissions are below required health standards, both locally and internationally.
Nevertheless the company recently announced it would spend millions to build a filter over one of its kilns to reduce dust emissions.
On top of asthma, residents allege that pollution from the plant causes blood noses, nausea, headaches. They have also claimed the dust strips paint from their cars.
Cockburn Cement has been operating at the same site in Munster for more than 50 years, and prior to large housing developments in the area.
Submissions to the inquiry can be lodged up until 5th November.
For more information about the inquiry process, or how to make a submission, visit the Parliament of WA website.