Processed on 2024-03-04 13:37:16 PST.

Disclaimer: Data presented here come from a variety of sources and do not represent official EPA measurements. Please visit AirNow for official measurements.

Cumulative exposure to smoke is an important public health metric. This report summarizes the cumulative number of days air quality monitors in New Hampshire spent in each AQI category during the the month of January.

The tables below include only permanent monitors measuring PM2.5 and show cumulative exposure under existing NAAQS (National Ambient Air Quality Standards) and under the 2024 revised standards for PM2.5.

In the tables and plots below, ‘Old’ designates cumulative days calculated using the 2023 PM2.5 NAAQS while ‘New’ is calculated using the 2024 revised PM2.5 NAAQS. The impact of the NAAQS revision is quite clear.

January in New Hampshire

January 2014 – 6 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 81 43 0 0 0 0 0
New 52 72 0 0 0 0 0

January 2015 – 5 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 103 39 0 0 0 0 13
New 77 65 0 0 0 0 13

January 2016 – 11 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 127 18 0 0 0 0 10
New 113 32 0 0 0 0 10

January 2017 – 6 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 142 9 0 0 0 0 4
New 129 22 0 0 0 0 4

January 2018 – 11 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 127 23 0 0 0 0 5
New 102 48 0 0 0 0 5

January 2019 – 6 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 151 2 0 0 0 0 2
New 136 17 0 0 0 0 2

January 2020 – 12 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 147 8 0 0 0 0 0
New 135 20 0 0 0 0 0

January 2021 – 7 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 159 21 0 0 0 0 6
New 142 38 0 0 0 0 6

January 2022 – 7 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 157 29 0 0 0 0 0
New 124 62 0 0 0 0 0

January 2023 – 7 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 177 4 0 0 0 0 5
New 163 18 0 0 0 0 5