Portskewett Plume Plotter
Portskewett incinerator plume
at 18:50 on Wed, 24 Jul 2024
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The map shows the (predicted) current state of pollution from the proposed incinerator at Severn Bridge Industrial Estate, Caldicot.

The red line shows wind direction. Green rings show distance (km). Colours show concentration of oxides of nitrogen at ground level. Maximum: 57.9 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
Particulates
TOC
Hydrogen chloride
Sulphur dioxide
Carbon monoxide
Cadmium and thallium
Mercury
Other metals
Dioxins and furans

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

Concentration
per m3
Background
(annual mean)
Plume
Oxides of nitrogen16.6 µg57.9 µg(350%)
Particulates13.6 µg2.9 µg(21%)
TOC198 ng2.9 µg(1463%)
Hydrogen chloride1.84 µg2.9 µg(157%)
Hydrogen flourideN/A290 ng
Sulphur dioxide3.98 µg14.5 µg(364%)
Carbon monoxide103 µg14.5 µg(14%)
Cadmium and thallium1.62 ng14.5 ng(895%)
Mercury5.27 ng14.5 ng(275%)
Other metals85.9 ng145 ng(169%)
Dioxins and furans48.7 fg29 fg(59%)
Display parameters
Zoom:
+
Area:
Centred
Downwind
Emissions:
Planned
Latest weather data
Wind 10.3 mph (4.6 m/s) from 200°. Cloud cover: 10/10. Temp: 16°C. Pressure: 1018 mb. Data from Bristol airport at 18:50.