Monitoring of air and water quality (until 2015)
Statistical activity code: 10201
Values measured at the monitoring sites: monthly amount of precipitation (mm), number of rainy days, average monthly temperature, maximum and minimum temperature, number of sunshine hours, relative humidity, average and maximum dose rate (nSv/h); sulphur dioxide, nitrogen dioxide, carbon monoxide, particulate matter and phenols concentration in air; concentration of sulphates, nitrates, chlorides and ammonia in precipitation
Country – total
Amount of precipitation – thickness of a water layer (in millimetres) which is composed of rain, freezing rain, drizzle, ice needles, snow, ice pellets sleet and hail or other types of precipitation falling on the earth upon condition that water doesn’t dissipate, doesn’t drip (trickle) into the earth and doesn’t vapour.
Number of rainy days – total number of the days when the sum of diurnal precipitation was equal to or more than 0.1 mm.
Relative humidity – the ratio of the partial pressure of water vapour in the mixture to the saturated vapour pressure of water at a prescribed temperature. Relative humidity is expressed as a percentage.
Dose rate – growth of dose in a time unit, the unit Sv/h (sievert per hour).
Gamma radiation (rays) – radiation produced by higher-energy photons which are separated from the unstable nucleus of an atom. In passing through a material, gamma radiation causes ionization of atoms, especially when interacting with electrons. Gamma rays have good permeation ability and only a very thick layer of high-density material (steel, concrete or lead) can act as a good shielding.
Natural background radiation – cosmic radiation (streams of cosmic radiation sent to the Earth by the Sun and stars); natural terrestrial radiation and radionuclides in food, etc. which constitute a natural environment for humans. In general, the natural background radiation in Estonia is below 300 nSv/h.
Carbon monoxide (CO) – a colourless and odourless gas which is a product of incomplete combustion of carbon compounds (fuels). The biggest sources of CO in urban air are vehicles and household heating.
LV – Limit Value of pollutant (until 2001, PCL or maximum Permissible Concentration Limit of pollutant was used).
LV₁ – one-hour mean limit value of pollution level.
LV₈– eight-hour mean sliding-scale limit value of pollution level.
LV₂₄ – 24-hour mean limit value of pollution level.
Nitrogen dioxide (NO₂) – a toxic gas which is generated for example in the cylinder of an explosion engine and is released into the atmosphere in the composition of exhaust gas discharged from vehicles.
Particulate matter (PM₁₀) – particles which can pass a cut-off of the aerodynamic diameter 10 µm in 50% of cases (fine particles less than 10 µm in diameter). Most kinds of anthropogenic particulate matter are included in this particle size fraction (e.g. fly ash formed as a result of combustion process, carbon black).
Phenol (C₆H₅OH) or carbolic acid – a slightly pink, toxic, crystalline substance which is soluble in water (~8 g / 100 ml). The term ‘phenol’ is used to denote the chemical compounds in which hydroxyl (-OH) is bound with an aromatic ring. Water of thermolysis of Estonian shale includes unique double-atomic phenols, for example methylresorcinols.
Sulphur dioxide (SO₂) – a colourless toxic gas of irritating sulphurous odour and very easily soluble in water. Sulphur dioxide is formed in the combustion of fuels which contain sulphur. In towns and cities, the main sources of SO₂ are boiler houses and vehicles.
Weather data – the Pärnu, Tallinn-Harku, Jõhvi, Narva-Jõesuu, Tartu-Tõravere and Viljandi monitoring sites
Air radiation data – the Kunda, Kärdla, Mustvee, Narva-Jõesuu, Pärnu, Sõrve, Tallinn, Türi, Valga and Võru monitoring sites
Pollutants in air – the Tallinn, Kohtla-Järve and Narva monitoring sites
Pollutants in precipitation – the Tallinn, Tooma, Jõhvi, Tiirikoja, Kunda and Narva-Jõesuu monitoring sites
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„Eesti statistika aastaraamat. Statistical Yearbook of Estonia”
Data are published under the heading „Environment/ State of environment” in the Statistical Database in http://pub.stat.ee.
Data serve as input for statistical activity 50101 „Estonian regional development”.
Meteorological observations are made and the parameters are calculated according to the methodology approved by the World Meteorological Organization (WMO).
The levels of radioactivity are monitored pursuant to the Commission Recommendation of 23 October 2006 adapting Recommendation 2000/473/Euratom on the application of Article 36 of the Euratom Treaty concerning the monitoring of the levels of radioactivity in the environment for the purpose of assessing the exposure of the population as a whole, by reason of the accession of Bulgaria and Romania (notified under document number C(2006) 4931).
To assure the quality of processes and products, Statistics Estonia applies the EFQM Excellence Model, EU Statistics Code of Practice and the ESS Quality Assurance Framework (QAF). Statistics Estonia is also guided by the requirements provided for in § 7. „Principles and quality criteria of producing official statistics” of the Official Statistics Act.
Statistics Estonia performs all statistical activities according to an international model (Generic Statistical Business Process Model – GSBPM). According to the GSBPM, the final phase of statistical activities is overall evaluation using information gathered in each phase or sub-process (this information includes, among other things, feedback from users, process metadata, system metrics and suggestions from employees). This information is used to prepare the evaluation report which outlines all the quality problems related to the specific statistical activity and serves as input for improvement actions.
Ministry of the Interior
Ministry of Social Affairs
City Council of Tartu
City Council of Pärnu
Estonian University of Life Sciences
National Institute for Health Development
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Since 1996 Statistics Estonia conducts reputation surveys and user surveys.
All results are available on the website http://www.stat.ee/user-surveys.
Observation data (from Pärnu, Jõhvi, Tallinn-Harku, Jõhvi, Narva-Jõesuu, Tartu-Tõravere and Viljandi weather stations) are received from the Estonian Environment Agency. Data on radiation (from 10 monitoring stations) are received from the Radiation Safety Department of the Environmental Board. Data on the components of ambient air pollution are received from the Estonian Environmental Research Centre.
DATA FROM OTHER STATISTICAL ACTIVITIES
The data are compared with the data of previous periods.
The indicators to be published are calculated on the basis of the data collected by the Estonian Environment Agency.