Made available in DSpace on 2015-04-14T13:33:08Z (GMT). No. of bitstreams: 1 453650.pdf: 939779 bytes, checksum: 7364d093228e0b61e9c071e815ee401a (MD5) Previous issue date: 2013-08-08 / Objective : To describe the levels of pollution in of public schools from the city of Porto Alegre, as well as to estimate the behavior of the different methodologies used to evaluate the concentration of pollutants. Methods : We measured the levels of pollutants that students are exposed in public schools from Porto Alegre. The distance from schools and homes to the avenue of higher vehicle traffic was estimated, and the levels of particulate matter of 2.5μm (MP2.5) in the microenvironments of the schools were measured, both at selected and moving points. Conclusion : This study indicates that a significant number of schools in the city of Porto Alegre and students residencies are located in places with air pollution levels considered risky to health according to the World Health Organization and the level of agreement between the methods used for pollution evaluation, were lower than expected. Results : Nine public schools of Porto Alegre were included and a total of 196 students. Thirty three percent of schools were within 400 meters of distance to a big avenue, a distance considered risky; the number of students living within 400 meters to a big avenue was 96 (49%). Eighty two students (42%) were exposed to MP2.5 levels above 25 mcg / m?, considered risky to health, during their pathway from home to school; at the indoor environment, 29 students (15%) and 53 students to outdoor environment (27%). The agreement between the methods used at the most polluted places Kappa values ranged from -0.443 (measured indoor) to 0.422 (measured outdoor).Conclusion : This study indicates that a significant number of schools in the city of Porto Alegre and students residencies are located in places with air pollution levels considered risky to health according to the World Health Organization and the level of agreement between the methods used for pollution evaluation, were lower than expected. / Objetivo : descrever os n?veis de polui??o atmosf?rica no ambiente de escolas p?blicas da cidade de Porto Alegre, assim como avaliar o comportamento das diferentes metodologias utilizadas para avalia??o da concentra??o de poluentes. M?todos : Foram aferidos os n?veis de poluentes ao quais est?o expostos os alunos das escolas p?blicas de Porto Alegre. Foram utilizados os dados das dist?ncias das escolas e das resid?ncias dos escolares com a avenida de maior tr?fego de ve?culos mais pr?xima; e ainda avaliaram-se os n?veis de material particulado 2.5μm (MP2.5) nos microambientes das escolas com avalia??es em movimento e avalia??es pontuais. Resultados : Foram inclu?das nove escolas da rede p?blica de Porto Alegre e um total de 196 alunos. A dist?ncia m?xima de 400 metros, considerada de risco, entre avenida e escola teve um total 33% e entre avenida e resid?ncia um total de 96 alunos (49%). Os n?veis de MP2.5 acima de 25μg/m?, considerado risco para sa?de, s?o 82 alunos para as rotas de pesquisa (42%), 29 alunos para ambiente indoor (15%) e 53 alunos para ambiente outdoor(27%). As concord?ncias entre os m?todos utilizados quanto aos locais mais polu?dos os valores de Kappa oscilaram de -0,443 (medida indoor) a 0,422 (medida outdoor) Conclus?o : O presente estudo indica que um n?mero expressivo de escolas do munic?pio de Porto Alegre e de escolares reside em locais com os n?veis de polui??o atmosf?rica considerados de risco para sa?de segundo a Organiza??o Mundial da Sa?de e que a concord?ncia entre os m?todos de avalia??o da polui??o utilizados tiveram valores inferiores ao esperado.