Table 1: Association between coal-fired power plant events and ZIP code-level HyADS emissions exposures in the 35 Jefferson County ZIP codes with population greater than 5.

Percent change was calculated Estimates provided from an ordinary least squares linear regression model adjusted for quarterly mean temperature, wind speed, relative humidity, and atmospheric pressure, and quarter and ZIP code. Included Liang and Zeger cluster-robust standard errors.

Coal-fired power plant transition date	% Δ HyADS (95% CI)a,b
Q2-2013	11 (6, 16)
Q4-2014	−27 (−31, −23)
Q2-2015	−55 (−61, −47)
Q2-2016	−29 (−33, −24)