Monitoramento da Qualidade do ar no Estado do ACRE - 2019

This executive summary reports on the 2019 air quality monitoring in the state of Acre, Brazil, utilizing a network of 30 low-cost PurpleAir sensors across 22 municipalities. The study focused on particulate matter (PM2.5) concentrations between June and December 2019, identifying significant violations of World Health Organization (WHO) air quality standards primarily driven by biomass burning from deforestation and pasture management.

• In June 2019, the largest air quality monitoring network in the Amazon became operational, consisting of 30 PurpleAir PA-II-SD low-cost sensors distributed across the headquarters of all 22 municipalities in the state of Acre.
• The primary source of air pollution in the Amazon is identified as burnings used for cleaning recently deforested areas or for the renovation of pastures and annual agricultural areas.
• In 2019, Acre experienced an average of 21 days where air quality exceeded the WHO daily limit for PM2.5 concentrations. The most critical months were August and September, with the highest concentrations typically occurring between 17:00 and 8:00 hours.
• Assis Brasil and Sena Madureira recorded the highest number of days violating WHO PM2.5 standards, both with 32 days. In Assis Brasil, one day was recorded with concentrations over five times the recommended limit.
• Several municipalities showed very low levels of concern regarding air quality, including Rodrigues Alves (0 days), Porto Walter (1 day), and Cruzeiro do Sul, Mâncio Lima, and Tarauacá (each with 3 days) above WHO standards.
• Acre saw a significant increase in deforestation and fire activity in 2019; it was the second Amazonian state with the highest increase in deforestation compared to 2018. Burnings in anthropized areas covered 180,209 hectares, an increase of approximately 80% over 2018, with 40% of these related to new deforestation.
• The monitoring effort faced technical challenges, including data gaps caused by lack of internet signal and electricity, which compromised analysis in some municipalities, such as Rodrigues Alves.

APA

de Melo, A. W. F., da Silva, S. S., Anderson, L. O., Nascimento, V. M. L. D., de Freitas, M. F., Duarte, A. F., & Brown, I. F. (2020). Monitoramento da Qualidade do ar no Estado do ACRE - 2019. Inter-American Institute for Global Change Research. https://iai.int/administrador/assets/images/ckfinder/files/AirQualityReport.pdf

Chicago

de Melo, Antonio Willian Flores, Sonaira Souza da Silva, Liana O. Anderson, Vângela Maria Lima do Nascimento, Marcelo Ferreira de Freitas, Alejandro Fonseca Duarte, and I. Foster Brown. Monitoramento da Qualidade do ar no Estado do ACRE - 2019. Inter-American Institute for Global Change Research, 2020. https://iai.int/administrador/assets/images/ckfinder/files/AirQualityReport.pdf.

Wikipedia

{{cite report |last1=de Melo |first1=Antonio Willian Flores |last2=da Silva |first2=Sonaira Souza |last3=Anderson |first3=Liana O. |last4=Nascimento |first4=Vângela Maria Lima do |last5=de Freitas |first5=Marcelo Ferreira |last6=Duarte |first6=Alejandro Fonseca |last7=Brown |first7=I. Foster |title=Monitoramento da Qualidade do ar no Estado do ACRE - 2019 |publisher=Inter-American Institute for Global Change Research |date=April 2020 |url=https://iai.int/administrador/assets/images/ckfinder/files/AirQualityReport.pdf |access-date=17 August 2026 |via=Climate Insights Directory}}

BibTeX

@techreport{demelo2020monitoramento, author = {de Melo, Antonio Willian Flores and da Silva, Sonaira Souza and Anderson, Liana O. and Nascimento, Vângela Maria Lima do and de Freitas, Marcelo Ferreira and Duarte, Alejandro Fonseca and Brown, I. Foster}, title = {{Monitoramento da Qualidade do ar no Estado do ACRE - 2019}}, institution = {Inter-American Institute for Global Change Research}, year = {2020}, month = apr, url = {https://iai.int/administrador/assets/images/ckfinder/files/AirQualityReport.pdf}, urldate = {2026-08-17}, note = {Indexed by Climate Insights Directory} }