Days Exceeding Ozone and Particulate Standards 2020
These summaries are not updated in real time. Data will be posted as soon as compiled. Data are preliminary, and subject to change. For statewide information by zip code or city name see EPA’s AIRNOW web page.

2020 Summary

Standard Limit # of Days Exceeding Max
Ozone 1-hour State Standard 94 ppb 4 103 ppb
Ozone 8-hour Federal Standard 70 ppb 6 86 ppb
Ozone 8-hour State Standard 70 pbb 6 86 ppb
Particulate Matter PM10 24-hour State Standard 50 ug/m3 33 117 ug/m3
Particulate Matter PM10 24-hour Federal Standard 154 ug/m3
Particulate Matter PM2.5 24-hour Federal Standard 35 ug/m3 10 88.4 ug/m3
CountDateDaily MaxCarpGoletaLas Flores CynLompoc HS&PLompoc H StParadise RdSanta BarbaraSanta MariaSanta Ynez
18/19/2097514644241497501877
28/21/201014732535215101302675
310/2/2010310384816734691035373
410/3/2010510176836522801054071
CountDateDaily MaxCarpGoletaLas Flores CynLompoc HS&PLompoc H StParadise RdSanta BarbaraSanta MariaSanta Ynez
18/18/2072503744431672353159
28/19/2085564350401785452167
38/20/2075433759301675382041
48/21/2085433446501485352766
510/2/2086866674643062724863
610/3/2083836774622069813562
CountDateDaily MaxCarpGoletaLas Flores CynLompoc HS&PLompoc H StParadise RdSanta BarbaraSanta MariaSanta Ynez
18/18/2072513845441772353260
28/19/2085564350401785452167
38/20/2075433759301675382041
48/21/2085433446501485352766
510/2/2086866674643062724863
610/3/2083836774622069813562
CountDateDaily MaxGoletaLas Flores CynLompoc H StSanta BarbaraSanta Maria
14/24/205134NA344451
24/30/20532015241453
35/1/20523324323152
45/7/20593621394259
56/7/20562417392556
67/4/20581917351958
78/19/20753934624475
88/20/20826667707182
98/21/20737368446958
108/22/20615442455561
119/5/20604126394860
129/6/20534227465053
139/7/20553030453355
149/11/20634236634855
159/12/20715844656071
169/13/20846457846283
179/14/20117865811184117
189/15/20927146637992
199/24/20532522242953
2010/1/20793634524979
2110/3/2010351458559103
2210/4/20784946655278
2310/13/20603222383560
2410/14/20523218474052
2510/15/20603020554160
2610/16/20613318574861
2710/26/20797773647960
2810/27/20715458615671
2910/28/20573935524357
3011/5/20663515494466
3111/6/20685734654968
3212/7/20564928344356
3312/8/20733514733446
CountDateDaily MaxGoletaLas Flores CynLompoc H StSanta BarbaraSanta Maria
        

 

CountDateDaily MaxGoletaLompoc H StSanta BarbaraSanta Maria
17/4/2035.58.019.38.035.5
28/20/2049.542.042.940.049.5
38/21/205050.028.445.032.3
49/11/2048.728.048.729.041.6
59/12/2053.243.049.14753.2
69/13/2066.046.063.446.066.0
79/14/2088.461.085.663.088.4
89/15/2065.452.048.259.065.4
910/2/2052.246.046.129.052.2
1010/3/2037.130.037.128.035.6

Notes:

        To view current exceedances, see Days Exceeding Ozone and Particulate Standards.

For previous years see 2019, 20182017, 2016 or 2015-1998.

Ozone 8 hour Averages   Although the federal and state 8-hour average ozone standards are both set at 70 ppb, recorded levels for the state standard are rounded to the nearest whole number, while levels for the federal standard are truncated to the nearest whole number.  For example, a value of 71.6 would be rounded to 72 for the state standard and truncated to 71 for the federal standard.

Particulate Matter PM10 is calculated different when being compared to the state standard versus the federal standard. The PM10 state 24 hour value is a rounded average of the monitors 24 hourly readings in a day using local ambient temperature and pressure conditions. The PM10 federal 24 hour value is a truncated average of the monitors 24 hourly readings in a day using standardized temperature and pressure conditions. This difference results in slightly different 24 hour averages for each monitoring station on a given day.