EXCEEDANCES AND DESIGN VALUES FOR STATE STANDARDS
North Central Coast Air Basin Air Monitoring Stations
2009-2011
Station Specific Exceedances and Design Values for the State
8-Hour Ozone Standard and the State 24-Hour PM10 Standard
Station1
2009
2010
2011
O3
PM10
O3
PM10
O3
PM10
Pinnacles
Nat'l Park
6
--
6
--
2
--
Hollister
2
0
4
0
0
0
King City
0
0
0
2
0
2
Salinas
0
0
0
0
0
--
Carmel
Valley
1
0
0
--
0
--
Santa Cruz
0
0
0
0
0
--
Air
Basin3
7
0
7
2
2
2
Design
Value2
O3
0.077
ppm
0.074
ppm
0.064
ppm
0.057
ppm
0.065
ppm
0.060
ppm
0.077
ppm
EPDC2
PM10
-44.1
µg/m3
74.0
µg/m3
57.5
µg/m3
NA
45.0
µg/m3
74.0
µg/m3
Dated 1/10/2013
Notes:
1) Hit Cntrl-left click on blue station name for more information on the site, including location and photos.
2) Stations with Red Design or EPDC Values violate the applicable standard.
 The 2008 State 8-hour ozone standard is 0.070 ppm.
 The State 24-hour PM10 standard is 50µg/m3.
3) On a day when more than one station exceeds the standard, only one air basin exceedance day is counted.
For this reason, the number of air basin exceedance days can be less than the sum of the number of station
exceedance days.
4) Abbreviations - - Pollutant not monitored
EPDC – Expected Peak Day Concentration
NA – Not Available
5) EPDCs are calculated expected once per year peak day concentration based on three years of data. These are
statistically calculated by ARB for each station and are a key metric for establishing designations.
6) PM10 EPDCs are based on 2008 to 2010 data.
7) Source: ARB California Air Quality Data