Essaouira Mogador is a town at the Atlantic coast of Morocco

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Air pollution

Realtime broadcasting air-quality.comĀ 


Readings from automatic weather station in Essaouira 120903:

Carbon monoxide

Carbon monoxide (CO)- is a colourless, odorless, non-irritating but very poisonous gas. It is a product by incomplete combustion of fuel such as natural gas, coal or wood. Vehicular exhaust is a major source of carbon monoxide.


The daily average for hourly values shall not exceed 10 ppm, and average of hourly values for any consecutive eight hour period shall not exceed 20ppm

1 ppm = 1.145mg/m3

Nitrogen oxides

Nitrogen oxides (NOx) - especially nitrogen dioxide are emitted from high temperature combustion, and are also produced naturally during thunderstorms by electrical discharge. Can be seen as the brown haze dome above or plume downwind of cities. Nitrogen dioxide is the chemical compound with the formula NO2. It is one of the several nitrogen oxides. This reddish-brown toxic gas has a characteristic sharp, biting odor. NO2 is one of the most prominent air pollutants.
The daily average for hourly values shall be within the 0.04-0.06 ppm zone or below that zone.

40 µg/m3 Anual mean
100 µg/m3 Hour mean


Ozone (O3)
Ground level ozone (O3) formed from NOx and VOCs. Ozone (O3) is a key constituent of the troposphere. It is also an important constituent of certain regions of the stratosphere commonly known as the Ozone layer. Photochemical and chemical reactions involving it drive many of the chemical processes that occur in the atmosphere by day and by night. At abnormally high concentrations brought about by human activities (largely the combustion of fossil fuel), it is a pollutant, and a constituent of smog.
100 µg/m3 8-hour mean

In Essaouira are the effects of odour, dust (sand), winds and humidity important factors for the Air Quality.


Fine Particulate Matter (PM2.5) The annual standard for PM2.5 is less than or equal to 15.0 µg/m3 .(24-hour 50.0 µg/m3)


Sulphur oxides

Sulphur oxides (SOx) - especially sulfur dioxide, a chemical compound with the formula SO2. SO2 is produced by volcanoes and in various industrial processes. Since coal and petroleum often contain sulfur compounds, their combustion generates sulfur dioxide. Further oxidation of SO2, usually in the presence of a catalyst such as NO2, forms H2SO4, and thus acid rain.[2] This is one of the causes for concern over the environmental impact of the use of these fuels as power sources.
The daily average for hourly values shall not exceed 0.04 ppm, and hourly values shall not exceed 0.1 ppm /
500 µg/m3, 10-minute mean