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Ozone pollution: information and recommendations

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With regard to air quality, the Principality of Monaco complies with the targets set out in European directives. Thus, when the information threshold of 180 µg ozone per cubic metre of air is exceeded, the Department of the Environment informs the population. 

Ozone pollution is caused by the effect of the sun on some industrial and vehicle pollutants. It increases with the intensity of the sun and when winds are light. Maximum concentrations are most often observed during the summer and in areas which can be a long way from the sources of pollution (on the outskirts of towns, or in the countryside or mountains). 

Due to the persistent very hot weather and lack of wind, which is preventing pollution from being dispersed, the Prince’s Government recommends following the guidelines set out below: 

Health recommendations for vulnerable or susceptible groups (pregnant women, babies, young children, people aged over 65, people suffering from cardiovascular disease, heart failure or breathing difficulties, people with asthma, and people whose symptoms appear or become worse when pollution levels spike): 

  • Limit physical activity and high-impact sporting activities outside
  • Avoid going out between 12 pm and 4 pm
  • Stick to short trips that involve minimum effort
  • If you experience respiratory or cardiac difficulties (shortness of breath, wheezing, palpitations, etc.), seek advice from a pharmacist or consult your doctor

Recommendations for road users: 

  • Try to use non-polluting methods of transport for short journeys wherever possible
  • For private and business trips, reduce car use by taking public transport or opting for car sharing
  • Avoid travelling on main roads and in surrounding areas during peak times

Other recommendations: 

  • Postpone maintenance work or cleaning which requires the use of solvents, paints, varnishes, etc.

Since 1991, air quality in the Principality has been monitored by an automated network of five monitoring stations: Rue Grimaldi, Boulevard Charles III, Place des Moulins, Fontvieille and Quai Antoine I. 

The data is processed on a daily basis by the Department of the Environment. 

Air pollutants such as nitrogen oxides, sulphur dioxide, carbon monoxide, dust and ozone are measured on a continuous basis.

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