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Monitoring Total Particulate Matter

We measure the total particulate mass concentration in the air on a routine basis as well as during incidents that may affect ambient air.

Raw 24-Hour Averages Data for Old White Rock Fire Station

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24-hour averages provide an indication of the current air concentrations.

They can be compared to the EPA standards of 35 µg/m3 (PM 2.5) and 150 µg/m3 (PM 10)

Select Start Date
JuneJuly 2017August
SunMonTueWedThuFriSat
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Select End Date
JuneJuly 2017August
SunMonTueWedThuFriSat
2526272829301
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8.7 µg/m3 on Thursday, July 20, 2017 1:00 AM 8.9129 µg/m3 on Thursday, July 20, 2017 1:30 AM 9.1795 µg/m3 on Thursday, July 20, 2017 2:00 AM 9.0973 µg/m3 on Thursday, July 20, 2017 2:30 AM 9.5756 µg/m3 on Thursday, July 20, 2017 3:00 AM 9.6821 µg/m3 on Thursday, July 20, 2017 3:30 AM 9.8902 µg/m3 on Thursday, July 20, 2017 4:00 AM 9.9473 µg/m3 on Thursday, July 20, 2017 4:30 AM 9.9699 µg/m3 on Thursday, July 20, 2017 5:00 AM 9.9533 µg/m3 on Thursday, July 20, 2017 5:30 AM 10.0082 µg/m3 on Thursday, July 20, 2017 6:00 AM 10.0291 µg/m3 on Thursday, July 20, 2017 6:30 AM 10.0496 µg/m3 on Thursday, July 20, 2017 7:00 AM 10.0852 µg/m3 on Thursday, July 20, 2017 7:30 AM 10.1462 µg/m3 on Thursday, July 20, 2017 8:00 AM 10.0368 µg/m3 on Thursday, July 20, 2017 8:30 AM 10.0985 µg/m3 on Thursday, July 20, 2017 9:00 AM 9.9765 µg/m3 on Thursday, July 20, 2017 9:30 AM 10.0177 µg/m3 on Thursday, July 20, 2017 10:00 AM 9.9013 µg/m3 on Thursday, July 20, 2017 10:30 AM 9.882 µg/m3 on Thursday, July 20, 2017 11:00 AM 9.7904 µg/m3 on Thursday, July 20, 2017 11:30 AM 9.899 µg/m3 on Thursday, July 20, 2017 12:00 PM 9.6501 µg/m3 on Thursday, July 20, 2017 12:30 PM 9.6837 µg/m3 on Thursday, July 20, 2017 1:00 PM 9.5742 µg/m3 on Thursday, July 20, 2017 1:30 PM 9.6015 µg/m3 on Thursday, July 20, 2017 2:00 PM 9.6039 µg/m3 on Thursday, July 20, 2017 2:30 PM 9.4351 µg/m3 on Thursday, July 20, 2017 3:00 PM 9.4832 µg/m3 on Thursday, July 20, 2017 3:30 PM 9.3194 µg/m3 on Thursday, July 20, 2017 4:00 PM 9.3932 µg/m3 on Thursday, July 20, 2017 4:30 PM 9.2341 µg/m3 on Thursday, July 20, 2017 5:00 PM 9.3598 µg/m3 on Thursday, July 20, 2017 5:30 PM 9.3443 µg/m3 on Thursday, July 20, 2017 6:00 PM 9.4431 µg/m3 on Thursday, July 20, 2017 6:30 PM 9.2768 µg/m3 on Thursday, July 20, 2017 7:00 PM 9.228 µg/m3 on Thursday, July 20, 2017 7:30 PM 9.2277 µg/m3 on Thursday, July 20, 2017 8:00 PM 9.2894 µg/m3 on Thursday, July 20, 2017 8:30 PM 9.1158 µg/m3 on Thursday, July 20, 2017 9:00 PM 9.1925 µg/m3 on Thursday, July 20, 2017 9:30 PM 9.1679 µg/m3 on Thursday, July 20, 2017 10:00 PM 9.1427 µg/m3 on Thursday, July 20, 2017 10:30 PM 9.0692 µg/m3 on Thursday, July 20, 2017 11:00 PM 8.9477 µg/m3 on Thursday, July 20, 2017 11:30 PM 9.0664 µg/m3 on Friday, July 21, 2017 12:00 AM 8.9239 µg/m3 on Friday, July 21, 2017 12:30 AM 8.8184 µg/m3 on Friday, July 21, 2017 1:00 AM 8.7007 µg/m3 on Friday, July 21, 2017 1:30 AM 8.555 µg/m3 on Friday, July 21, 2017 2:00 AM 8.2607 µg/m3 on Friday, July 21, 2017 2:30 AM 7.9164 µg/m3 on Friday, July 21, 2017 3:00 AM 7.6634 µg/m3 on Friday, July 21, 2017 3:30 AM 7.4944 µg/m3 on Friday, July 21, 2017 4:00 AM 7.4752 µg/m3 on Friday, July 21, 2017 4:30 AM 7.4378 µg/m3 on Friday, July 21, 2017 5:00 AM 7.4564 µg/m3 on Friday, July 21, 2017 5:30 AM 7.4119 µg/m3 on Friday, July 21, 2017 6:00 AM 7.3847 µg/m3 on Friday, July 21, 2017 6:30 AM 7.3525 µg/m3 on Friday, July 21, 2017 7:00 AM 7.3613 µg/m3 on Friday, July 21, 2017 7:30 AM 7.3786 µg/m3 on Friday, July 21, 2017 8:00 AM 7.3719 µg/m3 on Friday, July 21, 2017 8:30 AM 7.4577 µg/m3 on Friday, July 21, 2017 9:00 AM 7.4356 µg/m3 on Friday, July 21, 2017 9:30 AM 7.4952 µg/m3 on Friday, July 21, 2017 10:00 AM 7.4882 µg/m3 on Friday, July 21, 2017 10:30 AM 7.5846 µg/m3 on Friday, July 21, 2017 11:00 AM 7.6114 µg/m3 on Friday, July 21, 2017 11:30 AM 7.7546 µg/m3 on Friday, July 21, 2017 12:00 PM 7.7327 µg/m3 on Friday, July 21, 2017 12:30 PM 7.7503 µg/m3 on Friday, July 21, 2017 1:00 PM 7.7682 µg/m3 on Friday, July 21, 2017 1:30 PM 7.7111 µg/m3 on Friday, July 21, 2017 2:00 PM 7.6782 µg/m3 on Friday, July 21, 2017 2:30 PM 7.6313 µg/m3 on Friday, July 21, 2017 3:00 PM 7.7825 µg/m3 on Friday, July 21, 2017 3:30 PM 7.5755 µg/m3 on Friday, July 21, 2017 4:00 PM 7.5821 µg/m3 on Friday, July 21, 2017 4:30 PM 7.4781 µg/m3 on Friday, July 21, 2017 5:00 PM 7.5027 µg/m3 on Friday, July 21, 2017 5:30 PM 7.386 µg/m3 on Friday, July 21, 2017 6:00 PM 7.4607 µg/m3 on Friday, July 21, 2017 6:30 PM 7.2619 µg/m3 on Friday, July 21, 2017 7:00 PM 7.1354 µg/m3 on Friday, July 21, 2017 7:30 PM 7.101 µg/m3 on Friday, July 21, 2017 8:00 PM 7.0611 µg/m3 on Friday, July 21, 2017 8:30 PM 7.0684 µg/m3 on Friday, July 21, 2017 9:00 PM 7.1451 µg/m3 on Friday, July 21, 2017 9:30 PM 7.2468 µg/m3 on Friday, July 21, 2017 10:00 PM 7.3104 µg/m3 on Friday, July 21, 2017 10:30 PM 7.1682 µg/m3 on Friday, July 21, 2017 11:00 PM 7.3766 µg/m3 on Friday, July 21, 2017 11:30 PM 7.3574 µg/m3 on Saturday, July 22, 2017 12:00 AM 7.5422 µg/m3 on Saturday, July 22, 2017 12:30 AM 7.531 µg/m3 on Saturday, July 22, 2017 1:00 AM 7.708 µg/m3 on Saturday, July 22, 2017 1:30 AM 7.7295 µg/m3 on Saturday, July 22, 2017 2:00 AM 7.6784 µg/m3 on Saturday, July 22, 2017 2:30 AM 7.6713 µg/m3 on Saturday, July 22, 2017 3:00 AM 7.7125 µg/m3 on Saturday, July 22, 2017 3:30 AM 7.6775 µg/m3 on Saturday, July 22, 2017 4:00 AM 7.6623 µg/m3 on Saturday, July 22, 2017 4:30 AM 7.6564 µg/m3 on Saturday, July 22, 2017 5:00 AM 7.6343 µg/m3 on Saturday, July 22, 2017 5:30 AM 7.5847 µg/m3 on Saturday, July 22, 2017 6:00 AM 7.6051 µg/m3 on Saturday, July 22, 2017 6:30 AM 7.4448 µg/m3 on Saturday, July 22, 2017 7:00 AM 7.4622 µg/m3 on Saturday, July 22, 2017 7:30 AM 7.411 µg/m3 on Saturday, July 22, 2017 8:00 AM 7.3721 µg/m3 on Saturday, July 22, 2017 8:30 AM 7.3741 µg/m3 on Saturday, July 22, 2017 9:00 AM 7.3433 µg/m3 on Saturday, July 22, 2017 10:00 AM 7.336 µg/m3 on Saturday, July 22, 2017 10:30 AM 7.2933 µg/m3 on Saturday, July 22, 2017 11:00 AM 7.3134 µg/m3 on Saturday, July 22, 2017 11:30 AM 7.3875 µg/m3 on Saturday, July 22, 2017 12:00 PM 7.3772 µg/m3 on Saturday, July 22, 2017 12:30 PM 7.2937 µg/m3 on Saturday, July 22, 2017 1:00 PM 7.3865 µg/m3 on Saturday, July 22, 2017 1:30 PM 7.4089 µg/m3 on Saturday, July 22, 2017 2:00 PM 7.4004 µg/m3 on Saturday, July 22, 2017 2:30 PM 7.5524 µg/m3 on Saturday, July 22, 2017 3:00 PM 7.5194 µg/m3 on Saturday, July 22, 2017 3:30 PM 7.6697 µg/m3 on Saturday, July 22, 2017 4:00 PM 7.7833 µg/m3 on Saturday, July 22, 2017 4:30 PM 7.9239 µg/m3 on Saturday, July 22, 2017 5:00 PM 8.0533 µg/m3 on Saturday, July 22, 2017 5:30 PM 8.0628 µg/m3 on Saturday, July 22, 2017 6:00 PM 8.2712 µg/m3 on Saturday, July 22, 2017 6:30 PM 8.9715 µg/m3 on Saturday, July 22, 2017 7:00 PM 8.6306 µg/m3 on Saturday, July 22, 2017 7:30 PM 9.2335 µg/m3 on Saturday, July 22, 2017 8:00 PM 9.1369 µg/m3 on Saturday, July 22, 2017 8:30 PM 9.4685 µg/m3 on Saturday, July 22, 2017 9:00 PM 9.5672 µg/m3 on Saturday, July 22, 2017 9:30 PM 9.5942 µg/m3 on Saturday, July 22, 2017 10:00 PM 9.5428 µg/m3 on Saturday, July 22, 2017 10:30 PM 9.4209 µg/m3 on Saturday, July 22, 2017 11:00 PM 9.224 µg/m3 on Saturday, July 22, 2017 11:30 PM 9.158 µg/m3 on Sunday, July 23, 2017 12:00 AM 9.0129 µg/m3 on Sunday, July 23, 2017 12:30 AM 8.918 µg/m3 on Sunday, July 23, 2017 1:00 AM 8.8203 µg/m3 on Sunday, July 23, 2017 1:30 AM 8.8551 µg/m3 on Sunday, July 23, 2017 2:00 AM 8.6857 µg/m3 on Sunday, July 23, 2017 2:30 AM 8.6154 µg/m3 on Sunday, July 23, 2017 3:00 AM 8.5831 µg/m3 on Sunday, July 23, 2017 3:30 AM 8.6012 µg/m3 on Sunday, July 23, 2017 4:00 AM 8.417 µg/m3 on Sunday, July 23, 2017 4:30 AM 8.4105 µg/m3 on Sunday, July 23, 2017 5:00 AM 8.4176 µg/m3 on Sunday, July 23, 2017 5:30 AM 8.3583 µg/m3 on Sunday, July 23, 2017 6:00 AM 8.4282 µg/m3 on Sunday, July 23, 2017 6:30 AM 8.3283 µg/m3 on Sunday, July 23, 2017 7:00 AM 8.3767 µg/m3 on Sunday, July 23, 2017 7:30 AM 8.2971 µg/m3 on Sunday, July 23, 2017 8:00 AM 8.3479 µg/m3 on Sunday, July 23, 2017 8:30 AM 8.2751 µg/m3 on Sunday, July 23, 2017 9:00 AM 8.2987 µg/m3 on Sunday, July 23, 2017 9:30 AM 8.4853 µg/m3 on Sunday, July 23, 2017 10:00 AM 8.4504 µg/m3 on Sunday, July 23, 2017 10:30 AM 8.1377 µg/m3 on Sunday, July 23, 2017 11:00 AM 8.5234 µg/m3 on Sunday, July 23, 2017 11:30 AM 8.5478 µg/m3 on Sunday, July 23, 2017 12:00 PM 8.414 µg/m3 on Sunday, July 23, 2017 12:30 PM 9.0589 µg/m3 on Sunday, July 23, 2017 1:00 PM 8.977 µg/m3 on Sunday, July 23, 2017 1:30 PM 2.4999 µg/m3 on Thursday, July 20, 2017 1:00 AM 2.5267 µg/m3 on Thursday, July 20, 2017 1:30 AM 2.6102 µg/m3 on Thursday, July 20, 2017 2:00 AM 2.55 µg/m3 on Thursday, July 20, 2017 2:30 AM 2.6118 µg/m3 on Thursday, July 20, 2017 3:00 AM 2.5642 µg/m3 on Thursday, July 20, 2017 3:30 AM 2.6111 µg/m3 on Thursday, July 20, 2017 4:00 AM 2.5862 µg/m3 on Thursday, July 20, 2017 4:30 AM 2.5806 µg/m3 on Thursday, July 20, 2017 5:00 AM 2.5456 µg/m3 on Thursday, July 20, 2017 5:30 AM 2.5714 µg/m3 on Thursday, July 20, 2017 6:00 AM 2.5628 µg/m3 on Thursday, July 20, 2017 6:30 AM 2.5427 µg/m3 on Thursday, July 20, 2017 7:00 AM 2.563 µg/m3 on Thursday, July 20, 2017 7:30 AM 2.5651 µg/m3 on Thursday, July 20, 2017 8:00 AM 2.4957 µg/m3 on Thursday, July 20, 2017 8:30 AM 2.4763 µg/m3 on Thursday, July 20, 2017 9:00 AM 2.4575 µg/m3 on Thursday, July 20, 2017 9:30 AM 2.466 µg/m3 on Thursday, July 20, 2017 10:00 AM 2.3813 µg/m3 on Thursday, July 20, 2017 10:30 AM 2.3232 µg/m3 on Thursday, July 20, 2017 11:00 AM 2.2969 µg/m3 on Thursday, July 20, 2017 11:30 AM 2.325 µg/m3 on Thursday, July 20, 2017 12:00 PM 2.2116 µg/m3 on Thursday, July 20, 2017 12:30 PM 2.1942 µg/m3 on Thursday, July 20, 2017 1:00 PM 2.1595 µg/m3 on Thursday, July 20, 2017 1:30 PM 2.1876 µg/m3 on Thursday, July 20, 2017 2:00 PM 2.1746 µg/m3 on Thursday, July 20, 2017 2:30 PM 2.1098 µg/m3 on Thursday, July 20, 2017 3:00 PM 2.1251 µg/m3 on Thursday, July 20, 2017 3:30 PM 2.0545 µg/m3 on Thursday, July 20, 2017 4:00 PM 2.0618 µg/m3 on Thursday, July 20, 2017 4:30 PM 1.9972 µg/m3 on Thursday, July 20, 2017 5:00 PM 2.0665 µg/m3 on Thursday, July 20, 2017 5:30 PM 2.0383 µg/m3 on Thursday, July 20, 2017 6:00 PM 2.0759 µg/m3 on Thursday, July 20, 2017 6:30 PM 1.9997 µg/m3 on Thursday, July 20, 2017 7:00 PM 2.0009 µg/m3 on Thursday, July 20, 2017 7:30 PM 2.0001 µg/m3 on Thursday, July 20, 2017 8:00 PM 2.0356 µg/m3 on Thursday, July 20, 2017 8:30 PM 1.9512 µg/m3 on Thursday, July 20, 2017 9:00 PM 1.9688 µg/m3 on Thursday, July 20, 2017 9:30 PM 2.006 µg/m3 on Thursday, July 20, 2017 10:00 PM 1.9563 µg/m3 on Thursday, July 20, 2017 10:30 PM 1.9468 µg/m3 on Thursday, July 20, 2017 11:00 PM 1.8673 µg/m3 on Thursday, July 20, 2017 11:30 PM 1.9273 µg/m3 on Friday, July 21, 2017 12:00 AM 1.8852 µg/m3 on Friday, July 21, 2017 12:30 AM 1.8026 µg/m3 on Friday, July 21, 2017 1:00 AM 1.7867 µg/m3 on Friday, July 21, 2017 1:30 AM 1.7159 µg/m3 on Friday, July 21, 2017 2:00 AM 1.654 µg/m3 on Friday, July 21, 2017 2:30 AM 1.6015 µg/m3 on Friday, July 21, 2017 3:00 AM 1.6003 µg/m3 on Friday, July 21, 2017 3:30 AM 1.5967 µg/m3 on Friday, July 21, 2017 4:00 AM 1.6228 µg/m3 on Friday, July 21, 2017 4:30 AM 1.6065 µg/m3 on Friday, July 21, 2017 5:00 AM 1.6744 µg/m3 on Friday, July 21, 2017 5:30 AM 1.6646 µg/m3 on Friday, July 21, 2017 6:00 AM 1.6805 µg/m3 on Friday, July 21, 2017 6:30 AM 1.6592 µg/m3 on Friday, July 21, 2017 7:00 AM 1.6876 µg/m3 on Friday, July 21, 2017 7:30 AM 1.7063 µg/m3 on Friday, July 21, 2017 8:00 AM 1.6929 µg/m3 on Friday, July 21, 2017 8:30 AM 1.7578 µg/m3 on Friday, July 21, 2017 9:00 AM 1.7519 µg/m3 on Friday, July 21, 2017 9:30 AM 1.8248 µg/m3 on Friday, July 21, 2017 10:00 AM 1.7983 µg/m3 on Friday, July 21, 2017 10:30 AM 1.868 µg/m3 on Friday, July 21, 2017 11:00 AM 1.8637 µg/m3 on Friday, July 21, 2017 11:30 AM 1.964 µg/m3 on Friday, July 21, 2017 12:00 PM 1.9549 µg/m3 on Friday, July 21, 2017 12:30 PM 1.9504 µg/m3 on Friday, July 21, 2017 1:00 PM 1.9721 µg/m3 on Friday, July 21, 2017 1:30 PM 1.9437 µg/m3 on Friday, July 21, 2017 2:00 PM 1.9323 µg/m3 on Friday, July 21, 2017 2:30 PM 1.903 µg/m3 on Friday, July 21, 2017 3:00 PM 1.9971 µg/m3 on Friday, July 21, 2017 3:30 PM 1.897 µg/m3 on Friday, July 21, 2017 4:00 PM 1.9073 µg/m3 on Friday, July 21, 2017 4:30 PM 1.847 µg/m3 on Friday, July 21, 2017 5:00 PM 1.9066 µg/m3 on Friday, July 21, 2017 5:30 PM 1.8243 µg/m3 on Friday, July 21, 2017 6:00 PM 1.8739 µg/m3 on Friday, July 21, 2017 6:30 PM 1.7846 µg/m3 on Friday, July 21, 2017 7:00 PM 1.7715 µg/m3 on Friday, July 21, 2017 7:30 PM 1.7563 µg/m3 on Friday, July 21, 2017 8:00 PM 1.7472 µg/m3 on Friday, July 21, 2017 8:30 PM 1.7382 µg/m3 on Friday, July 21, 2017 9:00 PM 1.785 µg/m3 on Friday, July 21, 2017 9:30 PM 1.8525 µg/m3 on Friday, July 21, 2017 10:00 PM 1.8867 µg/m3 on Friday, July 21, 2017 10:30 PM 1.7899 µg/m3 on Friday, July 21, 2017 11:00 PM 1.9461 µg/m3 on Friday, July 21, 2017 11:30 PM 1.9171 µg/m3 on Saturday, July 22, 2017 12:00 AM 1.9977 µg/m3 on Saturday, July 22, 2017 12:30 AM 1.9655 µg/m3 on Saturday, July 22, 2017 1:00 AM 2.0743 µg/m3 on Saturday, July 22, 2017 1:30 AM 2.1169 µg/m3 on Saturday, July 22, 2017 2:00 AM 2.0513 µg/m3 on Saturday, July 22, 2017 2:30 AM 2.0476 µg/m3 on Saturday, July 22, 2017 3:00 AM 2.0856 µg/m3 on Saturday, July 22, 2017 3:30 AM 2.0758 µg/m3 on Saturday, July 22, 2017 4:00 AM 2.0562 µg/m3 on Saturday, July 22, 2017 4:30 AM 2.0403 µg/m3 on Saturday, July 22, 2017 5:00 AM 2.026 µg/m3 on Saturday, July 22, 2017 5:30 AM 2.018 µg/m3 on Saturday, July 22, 2017 6:00 AM 2.0183 µg/m3 on Saturday, July 22, 2017 6:30 AM 1.9304 µg/m3 on Saturday, July 22, 2017 7:00 AM 1.944 µg/m3 on Saturday, July 22, 2017 7:30 AM 1.9287 µg/m3 on Saturday, July 22, 2017 8:00 AM 1.8768 µg/m3 on Saturday, July 22, 2017 8:30 AM 1.9083 µg/m3 on Saturday, July 22, 2017 9:00 AM 1.919 µg/m3 on Saturday, July 22, 2017 10:00 AM 1.906 µg/m3 on Saturday, July 22, 2017 10:30 AM 1.8869 µg/m3 on Saturday, July 22, 2017 11:00 AM 1.9082 µg/m3 on Saturday, July 22, 2017 11:30 AM 1.9695 µg/m3 on Saturday, July 22, 2017 12:00 PM 1.9864 µg/m3 on Saturday, July 22, 2017 12:30 PM 1.933 µg/m3 on Saturday, July 22, 2017 1:00 PM 1.9994 µg/m3 on Saturday, July 22, 2017 1:30 PM 2.0214 µg/m3 on Saturday, July 22, 2017 2:00 PM 2.0032 µg/m3 on Saturday, July 22, 2017 2:30 PM 2.077 µg/m3 on Saturday, July 22, 2017 3:00 PM 2.0438 µg/m3 on Saturday, July 22, 2017 3:30 PM 2.1354 µg/m3 on Saturday, July 22, 2017 4:00 PM 2.1719 µg/m3 on Saturday, July 22, 2017 4:30 PM 2.2305 µg/m3 on Saturday, July 22, 2017 5:00 PM 2.3119 µg/m3 on Saturday, July 22, 2017 5:30 PM 2.3571 µg/m3 on Saturday, July 22, 2017 6:00 PM 2.4397 µg/m3 on Saturday, July 22, 2017 6:30 PM 2.5145 µg/m3 on Saturday, July 22, 2017 7:00 PM 2.5534 µg/m3 on Saturday, July 22, 2017 7:30 PM 2.6331 µg/m3 on Saturday, July 22, 2017 8:00 PM 2.6561 µg/m3 on Saturday, July 22, 2017 8:30 PM 2.6568 µg/m3 on Saturday, July 22, 2017 9:00 PM 2.7162 µg/m3 on Saturday, July 22, 2017 9:30 PM 2.7376 µg/m3 on Saturday, July 22, 2017 10:00 PM 2.7293 µg/m3 on Saturday, July 22, 2017 10:30 PM 2.6286 µg/m3 on Saturday, July 22, 2017 11:00 PM 2.5607 µg/m3 on Saturday, July 22, 2017 11:30 PM 2.524 µg/m3 on Sunday, July 23, 2017 12:00 AM 2.4873 µg/m3 on Sunday, July 23, 2017 12:30 AM 2.4245 µg/m3 on Sunday, July 23, 2017 1:00 AM 2.4287 µg/m3 on Sunday, July 23, 2017 1:30 AM 2.4813 µg/m3 on Sunday, July 23, 2017 2:00 AM 2.4059 µg/m3 on Sunday, July 23, 2017 2:30 AM 2.3314 µg/m3 on Sunday, July 23, 2017 3:00 AM 2.3642 µg/m3 on Sunday, July 23, 2017 3:30 AM 2.3825 µg/m3 on Sunday, July 23, 2017 4:00 AM 2.2753 µg/m3 on Sunday, July 23, 2017 4:30 AM 2.2619 µg/m3 on Sunday, July 23, 2017 5:00 AM 2.2811 µg/m3 on Sunday, July 23, 2017 5:30 AM 2.264 µg/m3 on Sunday, July 23, 2017 6:00 AM 2.297 µg/m3 on Sunday, July 23, 2017 6:30 AM 2.2369 µg/m3 on Sunday, July 23, 2017 7:00 AM 2.2568 µg/m3 on Sunday, July 23, 2017 7:30 AM 2.2133 µg/m3 on Sunday, July 23, 2017 8:00 AM 2.1952 µg/m3 on Sunday, July 23, 2017 8:30 AM 2.1489 µg/m3 on Sunday, July 23, 2017 9:00 AM 2.1651 µg/m3 on Sunday, July 23, 2017 9:30 AM 2.1714 µg/m3 on Sunday, July 23, 2017 10:00 AM 2.155 µg/m3 on Sunday, July 23, 2017 10:30 AM 2.0359 µg/m3 on Sunday, July 23, 2017 11:00 AM 2.0669 µg/m3 on Sunday, July 23, 2017 11:30 AM 2.0607 µg/m3 on Sunday, July 23, 2017 12:00 PM 1.9813 µg/m3 on Sunday, July 23, 2017 12:30 PM 2.0033 µg/m3 on Sunday, July 23, 2017 1:00 PM 1.9597 µg/m3 on Sunday, July 23, 2017 1:30 PM
Date & TimePM 2.5 24-hour Average (µg/m3)PM 10 24-hour Average (µg/m3)
7/23/2017 12:30:00 PM (MDT) 1.96 8.977
7/23/2017 12:00:00 PM (MDT) 2 9.0589
7/23/2017 11:30:00 AM (MDT) 1.98 8.414
7/23/2017 11:00:00 AM (MDT) 2.06 8.5478
7/23/2017 10:30:00 AM (MDT) 2.07 8.5234
7/23/2017 10:00:00 AM (MDT) 2.04 8.1377
7/23/2017 9:30:00 AM (MDT) 2.15 8.4504
7/23/2017 9:00:00 AM (MDT) 2.17 8.4853
7/23/2017 8:30:00 AM (MDT) 2.17 8.2987
7/23/2017 8:00:00 AM (MDT) 2.15 8.2751
7/23/2017 7:30:00 AM (MDT) 2.2 8.3479
7/23/2017 7:00:00 AM (MDT) 2.21 8.2971
7/23/2017 6:30:00 AM (MDT) 2.26 8.3767
7/23/2017 6:00:00 AM (MDT) 2.24 8.3283
7/23/2017 5:30:00 AM (MDT) 2.3 8.4282
7/23/2017 5:00:00 AM (MDT) 2.26 8.3583
7/23/2017 4:30:00 AM (MDT) 2.28 8.4176
7/23/2017 4:00:00 AM (MDT) 2.26 8.4105
7/23/2017 3:30:00 AM (MDT) 2.28 8.417
7/23/2017 3:00:00 AM (MDT) 2.38 8.6012
7/23/2017 2:30:00 AM (MDT) 2.36 8.5831
7/23/2017 2:00:00 AM (MDT) 2.33 8.6154
7/23/2017 1:30:00 AM (MDT) 2.41 8.6857
7/23/2017 1:00:00 AM (MDT) 2.48 8.8551
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