One of Western Australia's largest egg producers is facing two legal fronts, including new complaints about sanitary conditions, on the eve of federal charges over false labelling of its free-range eggs.

Snowdale Holdings, which runs Swan Valley Egg Farm and sells various brands, including Free Range Eggs by Ellah, is due to appear in the Perth Federal Court on Monday over Australian Competition and Consumer Commission charges of false and misleading conduct.

Laying hen at Swan Valley Egg Farm, Carabooda. Credit:Terry Loftus, Sun City News

The City of Wanneroo is also considering laying charges over an investigation into sanitary conditions at Snowdale's Carabooda egg farm, north of Perth.

Following a Fairfax Media investigation by the Two Rocks-based Sun City News, WA's Department of Environment Regulation and the City of Wanneroo inspected the Snowdale farm on September 16 and found "large amounts of chicken manure, carcasses and broken eggs" in alleged breach of the Health Act.