PM10 Average Values

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Table 1 lists the 2nd highest, 24-hour average concentration of PM₁₀ recorded at monitoring sites in North Carolina between 2018 and 2020.  In addition, the table lists the 2nd highest 24-hour average concentration of PM₁₀ recorded through North Carolina’s Revolving Site Program.  The Revolving Site Program operates monitors on a 12-month basis to provide a snapshot of PM₁₀ conditions across more areas of the state.  Data from these sites do not meet USEPA requirements for operation over a full 3-year period but have been included to provide a more complete picture of PM values.  Data from the revolving sites program are indicated by an asterisk (*).  The first column below lists the county where the monitoring site is located, and the second column lists the 2nd highest 24-hour average recorded for the period.  In counties with more than one PM₁₀ monitoring site, the value reported is the 2nd highest measured for all sites in the county during the 3-year period.   

Purpose of Monitor

^[1] SLAMS – (State and Local Monitoring Stations) Network of monitoring stations that monitor ambient air concentrations for pollutants for which standards have been established. The scale of these sites can be either Neighborhood or urban.

^[2] SPM – (Special Purpose Monitors) SPMs allow the capability of providing monitoring for various reasons such as special studies, modeling verification or compliance status, and other objectives. These monitors are not committed to any one location or for any specified period.

^[3] NCORE – (National Core) Community-oriented multi-pollutant monitoring station used to evaluate the regional air quality models used in developing emission strategies and to track trends in air pollution abatement control measures’ impact on improving air quality.

Please click here to open the map as a PDF.

Table 1 lists the 2nd highest, 24-hour average concentration of PM₁₀ recorded at monitoring sites in North Carolina between 2017 and 2019.  In addition, the table lists the 2nd highest 24-hour average concentration of PM₁₀ recorded through North Carolina’s Revolving Site Program.  The Revolving Site Program operates monitors on a 12-month basis to provide a snapshot of PM₁₀ conditions across more areas of the state.  Data from these sites do not meet USEPA requirements for operation over a full 3-year period but have been included to provide a more complete picture of PM values.  Data from the revolving sites program are indicated by an asterisk (*).  The first column below lists the county where the monitoring site is located, and the second column lists the 2nd highest 24-hour average recorded for the period.  In counties with more than one PM₁₀ monitoring site, the value reported is the 2nd highest measured for all sites in the county during the 3-year period.   

Purpose of Monitor

^[1] SLAMS – (State and Local Monitoring Stations) Network of monitoring stations that monitor ambient air concentrations for pollutants for which standards have been established. The scale of these sites can be either Neighborhood or urban.

^[2] SPM – (Special Purpose Monitors) SPMs allow the capability of providing monitoring for various reasons such as special studies, modeling verification or compliance status, and other objectives. These monitors are not committed to any one location or for any specified period.

^[3] NCORE – (National Core) Community-oriented multi-pollutant monitoring station used to evaluate the regional air quality models used in developing emission strategies and to track trends in air pollution abatement control measures’ impact on improving air quality.

Please click here to open the map as a PDF.

Table 1 lists the 2nd highest, 24-hour average concentration of PM10 recorded at monitoring sites in North Carolina between 2016 and 2018.  In addition, the table lists the 2nd highest 24-hour average concentration of PM10 recorded through North Carolina’s Revolving Site Program.  The Revolving Site Program operates monitors on a 12-month basis to provide a snapshot of PM10 conditions across more areas of the state.  Data from these sites do not meet USEPA requirements for operation over a full 3-year period but have been included to provide a more complete picture of PM values.  Data from the revolving sites program are indicated by an asterisk (*).  The first column below lists the county where the monitoring site is located, and the second column lists the 2nd highest 24-hour average recorded for the period.  In counties with more than one PM10 monitoring site, the value reported is the 2nd highest measured for all sites in the county during the 3-year period.   

Purpose of Monitor

^[1] SLAMS – (State and Local Monitoring Stations) Network of monitoring stations that monitor ambient air concentrations for pollutants for which standards have been established. The scale of these sites can be either Neighborhood or urban.

^[2] SPM – (Special Purpose Monitors) SPMs allow the capability of providing monitoring for various reasons such as special studies, modeling verification or compliance status, and other objectives. These monitors are not committed to any one location or for any specified period.

^[3] NCORE – (National Core) Community-oriented multi-pollutant monitoring station used to evaluate the regional air quality models used in developing emission strategies and to track trends in air pollution abatement control measures’ impact on improving air quality.

Please click here to open the map as a PDF.

Table 1 lists the 2nd highest, 24-hour average concentration of PM10 recorded at monitoring sites in North Carolina between 2015 and 2017.  In addition, the table lists the 2nd highest 24-hour average concentration of PM10 recorded through North Carolina’s Revolving Site Program.  The Revolving Site Program operates monitors on a 12-month basis to provide a snapshot of PM10 conditions across more areas of the state.  Data from these sites do not meet USEPA requirements for operation over a full 3-year period but have been included to provide a more complete picture of PM values.  Data from the revolving sites program are indicated by an asterisk (*).  The first column below lists the county where the monitoring site is located, and the second column lists the 2nd highest 24-hour average recorded for the period.  In counties with more than one PM10 monitoring site, the value reported is the 2nd highest measured for all sites in the county during the 3-year period.   

Purpose of Monitor

^[1] SLAMS – (State and Local Monitoring Stations) Network of monitoring stations that monitor ambient air concentrations for pollutants for which standards have been established. The scale of these sites can be either Neighborhood or urban.

^[2] SPM – (Special Purpose Monitors) SPMs allow the capability of providing monitoring for various reasons such as special studies, modeling verification or compliance status, and other objectives. These monitors are not committed to any one location or for any specified period.

^[3] NCORE – (National Core) Community-oriented multi-pollutant monitoring station used to evaluate the regional air quality models used in developing emission strategies and to track trends in air pollution abatement control measures’ impact on improving air quality.

Table 1. The following table shows 3-year averages for the 98^th percentile of PM₁₀ concentrations. The first column lists the county, the second lists the average value for that county. In Counties with more than one PM₁₀ monitoring site, the value reported is the highest 3-year average among the inclusive sites.