. Author manuscript; available in PMC: 2023 Jun 3.

Published in final edited form as: J Expo Sci Environ Epidemiol. 2022 May 20;33(3):377–385. doi: 10.1038/s41370-022-00446-5

Table 1.

Summary of pollutant concentrations across all ZIP code-days for each exposure metric.¹

	1-hr max CO (ppb)			1-hr max NO₂ (ppb)			1-hr max SO₂ (ppb)			8-hr max O₃ (ppb)			24-hr avg PM_2.5 (μg/m³)			24-hr avg SO₄ (μg/m³)			24-hr avg EC (μg/m³)			24-hr avg OC (μg/m³)
	N=345,600			N=343,680			N=345,216			N=344,640			N=345,216			N=342,528			N=340,608			N=86,976
Metric	Median	IQR	Max	Median	IQR	Max	Median	IQR	Max	Median	IQR	Max	Median	IQR	Max	Median	IQR	Max	Median	IQR	Max	Median	IQR	Max
CM	378.5	326.2	2309.6	29.7	17.9	82.5	3.0	7.4	86.3	39.6	22.6	103.6	9.7	5.9	39.8	2.1	1.5	11.0	0.67	0.48	4.32	2.6	1.6	12.2
SA	458.2	332.6	1879.3	16.8	14.3	70.8	2.6	5.1	64.9	39.9	18.6	89.0	10.2	6.4	31.6	2.0	1.5	7.4	0.59	0.56	3.57	2.4	1.5	8.5
IDW	490.9	315.0	3287.1	19.5	14.2	82.2	2.8	4.8	128.3	39.4	19.3	120.1	10.2	6.3	62.1	2.0	1.5	11.0	0.61	0.45	4.31	2.4	1.5	12.2
KRIG	472.6	335.1	4287.8	17.3	13.5	79.5	2.6	4.6	122.5	39.3	19.4	118.4	10.1	6.5	63.3	2.0	1.5	11.0	0.61	0.44	4.28	2.3	1.5	12.1
CMAQ	359.2	340.1	2516.7	20.9	22.8	119.9	1.6	1.9	46.3	41.6	20.8	108.6	9.1	6.8	121.0	1.7	1.3	10.1	0.83	0.89	11.53	1.8	1.9	38.1
CMAQKR	373.0	325.0	4051.8	12.8	16.0	88.7	2.5	4.6	575.9	41.0	19.0	272.5	9.5	6.5	57.2	1.9	1.5	12.4	0.47	0.42	4.52	2.2	1.7	13.1
CMAQDF	490.7	318.8	3559.8	16.7	15.4	117.3	2.1	2.6	177.9	40.2	18.7	118.6	9.1	4.5	63.5	1.9	1.3	10.1	0.51	0.37	2.80	2.0	1.0	8.9
LUR				13.1	14.7	75.9							10.2	4.0	57.3
AOD													10.4	6.0	47.6

Exposure metrics included: Central Monitor (CM), Site Average (SA), Inverse Distance Weighting (IDW), Kriging (KRIG), Community Multiscale Air Quality model (CMAQ), CMAQ-kriging adjustment with observations (CMAQKR), CMAQ combined with monitoring data in a data fusion (CMAQDF), Land Use Regression (LUR), and satellite Aerosol Optical Depth (AOD).