Details of Plymouth Plume Plotter

This page should be read in conjunction with How Plume Plotter Works. It provides more details specific to the Plymouth version of Plume Plotter.

Stack measurements

All of these are taken from [1]:


The emission rates of pollutants are taken from [1]. These are:

PollutantEmission rate
per second
Oxides of nitrogen11.2 g
Particulates PM10559 mg
Sulphur dioxide2.79 g
TOC559 mg
Carbon monoxide2.79 g
Hydrogen chloride559 mg
Hydrogen flouride55.9 mg
Ammonia559 mg
Cadmium and thallium2.79 mg
Mercury2.79 mg
Arsenic170 μg
Chromium1.84 mg
Nickel7.6 mg
Other metals27.9 mg
Dioxins and furans5.01 ng
PAH501 μg
PCBs279 μg

Background levels

The background levels of pollutants are taken from [1]. These are:

concentration per m3
Oxides of nitrogen15.3 μg
Particulates PM1013.3 μg
Sulphur dioxide7.1 μg
TOC330 ng
Carbon monoxide134 μg
Hydrogen chloride410 ng
Hydrogen flouride3 ng
Ammonia1 μg
Cadmium and thallium90 pg
Mercury10 pg
Arsenic410 pg
Chromium520 pg
Nickel1.96 ng
Other metals10.68 ng
Dioxins and furans8.5 fg
PAH121 pg
PCBs1.724 ng

Weather data

Wind speed, wind direction, temperature, pressure, and solar radiation are the latest values reported by one of two weather stations. If a value is not available from the primary weather station it is obtained from the secondary weather station. (Some weather stations do not measure solar radiation at all.) The primary weather station is and the secondary weather station is .

Upper air data is the latest reported by the Camborne upper air station.


1. Energy from Waste Combined Heat and Power Facility, North Yard, Devonport: Air Quality Dispersion Modelling Report, May 2011.