Carnon River

The Carnon River is a heavily polluted river in Cornwall, England.[1] It starts in Chacewater.[2] Trewedna Water[3] and River Kennall[4] flow into the Carnon before it merges with Tallack's Creek to become Restronguet Creek,[5] which eventually flows into the English Channel at the mouth of Carrick Roads.[6]

Carnon River
Carnon River near Point Mills
Location within Cornwall
Location
Country	England
County	Cornwall
Physical characteristics
Source
• location	Chacewater, Cornwall
• coordinates	50°15′45″N 5°09′30″W
Mouth	Restronguet Creek
• location	Cornwall
• coordinates	50°12′28″N 5°04′59″W
Basin features
Tributaries
• left	50°12′51″N 5°05′55″W, 50°12′51″N 5°05′54″W, 50°12′51″N 5°05′54″W, 50°12′45″N 5°05′54″W, 50°12′20″N 5°05′02″W
• right	50°14′14″N 5°08′31″W, 50°13′49″N 5°07′35″W, Trewenda Water 50°12′54″N 5°06′04″W, River Kennall 50°12′25″N 5°05′29″W, Tallack's Creek 50°12′38″N 5°04′59″W

The Nebra sky disc, a gold-decorated bronze disc found in Germany and dated to the Bronze Age, contains both gold and tin from the Carnon valley.[7][8]

In 1992 the river was hit by a major pollution incident, when over 45 million litres of contaminated water from the closed Wheal Jane mine was released by the collapse of an adit, colouring the river water red. A treatment works has since been installed at Wheal Jane to intercept the contaminated water and treat it to remove suspended metals and restore a neutral pH.[9]