Abstract
Background
Every year thousands of wildland firefighters (WFFs) work to suppress wildfires to protect public safety, health, and property. Although much effort has been put toward mitigating air pollutant exposures for the public and WFFs, the current burden in this worker population is unclear as are the most effective exposure reduction strategies.
Objective
Quantify fireline carbon monoxide (CO) exposures in WFFs and identify predictors of exposures.
Methods
We collected 1-min breathing zone CO measurements on 246 WFFs assigned to fires between 2015 and 2017. We used generalized estimating equations to evaluate predictors of CO exposure.
Results
Approximately 5% of WFFs had fireline CO exposure means exceeding the National Wildfire Coordinating Group’s occupational exposure limit of 16 ppm. Relative to operational breaks, direct suppression-related job tasks were associated with 56% (95% CI: 47%, 65%) higher geometric mean CO concentrations, adjusted for incident type, crew type, and fire location. WFF perception of smoke exposure was a strong predictor of measured CO exposure.
Significance
Specific job tasks related to direct suppression and WFF perceptions of smoke exposure are potential opportunities for targeted interventions aimed at minimizing exposure to smoke.
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References
Bowman DMJS, Kolden CA, Abatzoglou JT, Johnston FH, van der Werf GR, Flannigan M. Vegetation fires in the Anthropocene. Nat Rev Earth Environ. 2020;1:500–15.
Artes T, Oom D, de Rigo D, Durrant TH, Maianti P, Liberta G, et al. A global wildfire dataset for the analysis of fire regimes and fire behaviour. Sci Data. 2019;6:296.
Xu R, Yu P, Abramson MJ, Johnston FH, Samet JM, Bell ML, et al. Wildfires, global climate change, and human health. N Engl J Med. 2020;383:2173–81.
Mapping the impacts of natural hazards and technological accidents in Europe: an overview of the last decade. Copenhagen, Denmark: European Environment Agency; 2010.
NICC Incident Management Situation Report December 31, 2020. Incident Management Situation Report (IMSR) Archives. National Interagency Coordination Center; 2020.
Liu JC, Mickley LJ, Sulprizio MP, Dominici F, Yue X, Ebisu K, et al. Particulate air pollution from wildfires in the western US under climate change. Clim Change. 2016;138:655–66.
Abatzoglou JT, Williams AP. Impact of anthropogenic climate change on wildfire across western US forests. Proc Natl Acad Sci USA. 2016;113:11770–5.
Butler C, Marsh S, Domitrovich JW, Helmkamp J. Wildland firefighter deaths in the United States: a comparison of existing surveillance systems. J Occup Environ Hyg. 2017;14:258–70.
Reinhardt TE, Ottmar RD. Baseline measurements of smoke exposure among wildland firefighters. J Occup Environ Hyg. 2004;1:593–606.
Adetona O, Reinhardt TE, Domitrovich J, Broyles G, Adetona AM, Kleinman MT, et al. Review of the health effects of wildland fire smoke on wildland firefighters and the public. Inhalation Toxicol. 2016;28:95–139.
Navarro KM, Cisneros R, Schweizer D, Chowdhary P, Noth EM, Balmes JR, et al. Incident command post exposure to polycyclic aromatic hydrocarbons and particulate matter during a wildfire. J Occup Environ Hyg. 2019;16:735–44.
Henn SA, Butler C, Li J, Sussell A, Hale C, Broyles G, et al. Carbon monoxide exposures among U.S. wildland firefighters by work, fire, and environmental characteristics and conditions. J Occup Environ Hyg. 2019;16:793–803.
Navarro KM, Kleinman MT, Mackay CE, Reinhardt TE, Balmes JR, Broyles GA, et al. Wildland firefighter smoke exposure and risk of lung cancer and cardiovascular disease mortality. Environ Res. 2019;173:462–8.
Broyles G. Wildland firefighter smoke exposure. United States Department of Agriculture Forest Service National Technology and Development Program; 2013.
Adetona O, Dunn K, Hall DB, Achtemeier G, Stock A, Naeher LP. Personal PM(2.5) exposure among wildland firefighters working at prescribed forest burns in Southeastern United States. J Occup Environ Hyg. 2011;8:503–11.
Wu CM, Song CC, Chartier R, Kremer J, Naeher L, Adetona O. Characterization of occupational smoke exposure among wildland firefighters in the midwestern United States. Environ Res. 2021;193:110541.
Interagency Standards for Fire and Fire Aviation Operations. Boise, ID: Interagency Standards for Fire and Fire Aviation Operations Group, National Interagency Fire Center; 2021.
National Interagency Fire Center. National Wildfire Coordinating Group: Monitoring and Mitigating Exposure to Carbon Monoxide and Particulates at Incident Base Camps. Memorandum NWCG 006-2012. Boise, ID2012.
Domitrovich JW, Broyles GA, Ottmar RD, Reinhardt TE, Naeher LP, Kleinman MT, et al. Final report: wildland fire smoke health effects on wildland firefighters and the public: Joint Fire Sciences Program (2017). https://www.firescience.gov/projects/13-1-02-14/project/13-1-02-14_final_report.pdf, Accessed date 20 Feb. 2021.
Reinhardt TE, Broyles G. Factors affecting smoke and crystalline silica exposure among wildland firefighters. J Occup Environ Hyg. 2019;16:151–64.
Woodfin WJ. Carbon monoxide (method 6604). In: Andrews R, O’Connor F, editors. NIOSH manual of analytical methods (NMAM). NIOSH manual of analytical methods (NMAM). 5th ed. Atlanta, GA; The National Institute for Occupational Safety and Health (NIOSH); 2020.
NIOSH Pocket Guide to Chemical Hazards. National Institute for Occupational Safety and Health: National Institute for Occupational Safety and Health. 2007. https://www.cdc.gov/niosh/npg/default.html, Accessed date 11 June 2021.
Hornung RW, Reed LD. Estimation of average concentration in the presence of nondetectable values. Appl Occup Environ Hyg. 1990;5:46–51.
Zeger SL, Liang KY. Longitudinal data analysis for discrete and continuous outcomes. Biometrics. 1986;42:121–30.
West MR, Costello S, Sol JA, Domitrovich JW. Risk for heat-related illness among wildland firefighters: job tasks and core body temperature change. Occup Environ Med. 2020;77:433–8.
Air Quality Guidelines – Second Edition. World Health Organization Copenhagen, Denmark: World Health Organization (2000). https://www.euro.who.int/__data/assets/pdf_file/0020/123059/AQG2ndEd_5_5carbonmonoxide.PDF, Accessed date 11 June 2021.
Quantitative risk and exposure assessment for carbon monoxide – amended. Research Triangle Park, North Carolina: U.S.Environmental Protection Agency, Office of Air Quality Planning and Standards, Health and Environmental Impacts Division; 2010.
Paoin K, Ueda K, Ingviya T, Buya S, Phosri A, Seposo XT, et al. Long-term air pollution exposure and self-reported morbidity: a longitudinal analysis from the Thai cohort study (TCS). Environ Res. 2021;192:110330.
Shin J, Park JY, Choi J. Long-term exposure to ambient air pollutants and mental health status: a nationwide population-based cross-sectional study. PLoS One. 2018;13:e0195607.
Bowe B, Xie Y, Yan Y, Al-Aly Z. Burden of cause-specific mortality associated with PM2.5 air pollution in the United States. JAMA Netw Open. 2019;2:e1915834.
Cohen AJ, Brauer M, Burnett R, Anderson HR, Frostad J, Estep K, et al. Estimates and 25-year trends of the global burden of disease attributable to ambient air pollution: an analysis of data from the Global Burden of Diseases Study 2015. Lancet. 2017;389:1907–18.
Ruby BC, Schoeller DA, Sharkey BJ, Burks C, Tysk S. Water turnover and changes in body composition during arduous wildfire suppression. Med Sci Sports Exerc. 2003;35:1760–5.
Austin C. Studies and research projects (Report R-572). Wildland firefighter health risks and respiratory protection. Institut de recherche Robert-Sauvé en santé et en sécurité du travail (IRSST); 2008.
McNamara ML, Semmens EO, Gaskill S, Palmer C, Noonan CW, Ward TJ. Base camp personnel exposure to particulate matter during wildland fire suppression activities. J Occup Environ Hyg. 2012;9:149–56.
Acknowledgements
We are grateful to the WFFs who volunteered to participate in this study.
Funding
This work was supported by the US Forest Service National Technology and Development Program (18-CR-11138100-023), the National Institute for Occupational Safety and Health (R21OH011385), and the National Institute of General Medical Sciences (P20GM130418). The findings and conclusions in this report are those of the author(s) and do not necessarily represent the official position of the National Institute for Occupational Safety and Health, Centers for Disease Control and Prevention. Mention of any company name or product does not constitute endorsement by NIOSH/CDC. The findings and conclusions in this report are those of the author(s) and should not be construed to represent any official USDA or U.S. Government determination or policy. This article was written and prepared by U.S. Government employees on official time, and it is therefore in the public domain and not subject to copyright.
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Conceptualization, ES, CL, MW, CN, JD; methodology, ES, CL, MW, JD; formal analysis, ES, CL; data curation, MW, JD; writing—original draft preparation, ES, CL, MW, KN; writing—review and editing, ES, CL, MW, CN, KN, JD; ES and CL have accessed and verified the underlying data. All authors reviewed and edited the manuscript to its final version.
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Semmens, E.O., Leary, C.S., West, M.R. et al. Carbon monoxide exposures in wildland firefighters in the United States and targets for exposure reduction. J Expo Sci Environ Epidemiol 31, 923–929 (2021). https://doi.org/10.1038/s41370-021-00371-z
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DOI: https://doi.org/10.1038/s41370-021-00371-z
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