Cornwall Plume Plotter
Cornwall incinerator plume
at 18:20 on Sat, 05 Jul 2025
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The map shows the (predicted) current state of pollution from the incinerator at St Dennis.

The red line shows wind direction. Green rings show distance (km). Colours show concentration of oxides of nitrogen at ground level. Maximum: 2.73 µg/m3. This is the concentration at the location that is most polluted by the plume.

Breakdown of pollutants at most polluted location (green = background, red = added by plume):

Oxides of nitrogen
Sulphur dioxide
Carbon monoxide
Particulates PM10
Hydrogen chloride
Hydrogen flouride
Mercury
Cadmium and thallium
Other metals
Dioxins and furans

Oxides of nitrogen
Sulphur dioxide
Carbon monoxide
Particulates PM10
Hydrogen chloride
Hydrogen flouride
Mercury
Cadmium and thallium
Other metals
Dioxins and furans

Concentration
per m3
Background
(annual mean)
Plume
Oxides of nitrogen7.5 µg2.73 µg(36%)
Sulphur dioxide8.8 µg170 ng(2%)
Carbon monoxide96 µg165 ng(0%)
Particulates PM1023 µg12.3 ng(0%)
Hydrogen chloride1.7 µg120 ng(7%)
Hydrogen flouride1 µg5.81 ng(1%)
VOCsN/A3.07 ng
AmmoniaN/A819 pg
Mercury130 pg47.5 pg(37%)
Cadmium and thallium90 pg23 pg(26%)
Other metals49.7 ng1.77 ng(4%)
Dioxins and furans18.9 fg0.0294 fg(0%)
Display parameters
Zoom:
+
Area:
Centred
Downwind
Emissions:
Planned
Historical
Latest weather data
Wind 13.9 mph (6.2 m/s) from 250°. Cloud cover: 8/10. Temp: 17°C. Pressure: 1015 mb. Data from Newquay airport at 18:20.