Open Knowledge

Pollutant Emissions 5% open


What data is expected?

Aggregate data about the emission of air pollutants especially those potentially harmful to human health (although it is not a requirement to include information on greenhouse gas emissions). Aggregate means national-level or available for at least three major cities. In order to satisfy the minimum requirements for this category, data must be available for the following pollutants and meet the following minimum criteria:

  • Particulate matter (PM) Levels
  • Sulphur oxides (SOx)
  • Nitrogen oxides (NOx)
  • Volatile organic compounds (VOCs)
  • Carbon monoxide (CO)
  • Updated on at least once a week.
  • Measured either at a national level by regions or at leasts in 3 big cities.

What data is available

  •   Openly licensed? No (No URL given)
  •   Is the data available for free? No
  •   Is the data machine readable? No (n/a)
  •   Available in bulk? No
  •   Is the data provided on a timely and up to date basis? No
  •   Publicly available? No published by National Agency for Environmental Protection)
  •   Is data in digital form? No
  •   Is the data available online? No (No URL given)
  •   Does the data exist? Yes


PDF Reports published in the official website of the National Agency for Environment Protection from 2005 to 2008. No more updates since then. The website and the information it contains are the property of the Agency, thus data is considered non-open.

(No change from 2013) 2015: The agency website is no longer accessible

16.10.2015 : it seem National Agency for Environmental Protection is Monitoring Air Quality data from a CONFERENCE PAPER of Hassen Kchih from the Agency Tunisian Air Quality Monitoring Network Presentation no data was fond in their web site ABSTRACT It is among the basic missions of the National Agency for Environmental Protection (NAEP) to preserve and improve the quality of our nation's air. In order to accomplish this mission, the Agency must be able to evaluate the status of the atmosphere compared to clean air standards and historical informations. That's why the NAEP established since 1996 an Air Quality Monitoring Network (AQMN) composed by thirteen permanent monitoring stations, two mobiles laboratories and a data elaboration centre with the aim of characterizing human health exposure and public impacts of conventional pollutants. In Tunisia, that extends over 163900 km² and includes 24 metropolitans towns, there are several permanent monitoring stations located in many towns like Tunis, Sfax, Sousse, Gabès Tozeur, Kef. In this paper, some stations of Tunisia and its monitoring networks have been selected as representative sites of the investigated area. In Tunis, the selected monitoring stations were located in Traffic area (Bab Saadoun), in urban area (El Mourouj) and in a suburban area (Nahli). Each station is provided with automatic analyzers of O 3 , NOx, SO 2 , PM10, CO and with meteorological sensors such as temperature, barometric pressure, relative humidity, solar radiation, wind speed and direction. Nitrogen oxides, NO and NO 2 , were analysed using the chemiluminescence method. The measurement of ozone is based on the capacity of such gases to absorb ultraviolet rays with opportune wavelengths, generated by built-in lamp. Carbon monoxide CO is analyzed infrared rays absorption (IR). The measurement of PM10 is based on the beta ray attenuation method while SO 2 is analysed using a fluorescence method. For all parameters, the data are collected by the monitoring network every hour. The data were validated according to this protocol: first, a preliminary validation was carried out by the software, which invalidated all the data occurred in calibration hours and the data identified as artifacts then a manual calibration was carried out by the operators, considering the relations among the parameters. This way it is possible to verify that eventual critical data are related to real pollution situations. Moreover, meteorological data (wind speed and direction) were used to investigate about the influence of natural events on high or low concentration situations

Reviewer comments

checked mybe somebdoey can Contact Hassen KCHIH(National Agency for Environmental Protection) to see if the data is open To the public



  • yar michl


  • Yosr Jouini