The Environment Agency has ruled out "an ongoing pollution incident at Porth Beach."
It follows reports from Radio Newquay listeners of two possible discharges in the small stream near the former car park on Monday.
A spokesperson said that “We are not aware of an ongoing pollution incident at Porth Beach, Newquay, today. A minor, intermittent, unknown pollution discharge was noted by a member of the public yesterday and reported to us this morning but this is believed to have now passed."
One eyewitness told us it "could be dangerous to beach users and dogs. When I was there, children, adults, and dogs were walking through the stream."
The Environment Agency advises beach users to check the SWIMFO website for the latest bathing water quality updates. Pollution incidents can be reported via their free 24-hour Incident Hotline on 0800 807060.
UK Surf & Skate Expo to return with bigger line-up in Newquay
Methodist minister reflects on eight years in Newquay as she prepares to move on
Concerns raised over anti-social behaviour near Newquay's new play park
Police appeal after 64 sheep stolen near Halloon Roundabout
Council backs replacing South West Water with a publicly owned company
Two men killed in collision near the A30
Poundstretcher confirms opening date for new Newquay store
Skybus customers contacted over Newquay flight changes
Newquay RNLI crew rescue man and dog from harbour in early morning call-out
Van occupants ordered to leave Newquay car park by Friday afternoon
English Para Surfing Open attracts competitors from across the UK and Europe to Fistral
One person taken to hospital after crash closes Newquay road
Boardmasters outlines welfare and safeguarding measures ahead of festival
Newquay mayor backs launch of Beryl e-scooters in town
Cornwall's worst mining disaster to be commemorated
Newquay BID launches campaign to encourage visitors during Boardmasters week