All the beaches in Newquay are clean, however, there are some environmental factors that might affect the beach quality and water quality on any individual day. 
As a rule, finding the cleanest beaches in Newquay is not something you actually need to think about. Simply choose the beach that takes your fancy! They are all fabulously clean and sandy and the water clean and warm.
However, you can check to find the latest issues and any warnings, which are produced and published daily by BeachLive.co.uk. Not all the beaches are monitored. What might affect a beach will be factors such as streams running through them as these can accumulate waste from the fields above during heavy rain storms, or beaches that have grazing farm animals above the beach (none in Newquay). In general, any pollution will be field run off rather than water-borne issues; water-borne issues might include any problems with sewage pumping plants or oil spills from major marine disasters.
Below are the water quality reports for the beaches that are currently available from BeachLive.co.uk, covering Crantock Beach, Fistral Beach, Great Western Beach, Lusty Glaze, Porth Beach, Tolcarne Beach and Towan Beach:
South West Water is the water company covering Cornwall.
