Pollutant, units

Households Sampled

Indoor Median

Indoor 90^th Percentile

Outdoor Median

Outdoor 90^th Percentile

Ultrafine PM, part./m³

14

2.9 × 10¹⁰

1.2 × 10¹¹

6.6 × 10¹⁰

1.4 × 10¹¹

PM_2.5, µg/m³

39

6.34

13.3

15.4

36.3

PM_c, µg/m³

39

31.1

72.3

79.7

178.6

PM₁₀, µg/m³

39

36.6

83.0

96.8

213.7

CO, ppm

49

0.73

1.25

0.77

1.29

HCHO, ppm

49

<0.01^*

0.05

<0.01^*

0.06

H₂S, ppm

49

<0.06^*

0.12

<0.06^*

0.14

NO₂, ppm

49

<0.01^*

0.01

<0.01^*

0.01

SO₂, ppm

49

<0.01^*

0.05

0.01

0.06