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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)

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14.8125 µg/m3 on Sunday, March 19, 2017 1:00 AM 14.7381 µg/m3 on Sunday, March 19, 2017 1:30 AM 14.8689 µg/m3 on Sunday, March 19, 2017 2:00 AM 14.7604 µg/m3 on Sunday, March 19, 2017 2:30 AM 14.6296 µg/m3 on Sunday, March 19, 2017 3:00 AM 14.7519 µg/m3 on Sunday, March 19, 2017 3:30 AM 14.7078 µg/m3 on Sunday, March 19, 2017 4:00 AM 14.5051 µg/m3 on Sunday, March 19, 2017 4:30 AM 14.5475 µg/m3 on Sunday, March 19, 2017 5:00 AM 14.3301 µg/m3 on Sunday, March 19, 2017 5:30 AM 14.4023 µg/m3 on Sunday, March 19, 2017 6:00 AM 14.094 µg/m3 on Sunday, March 19, 2017 6:30 AM 14.0399 µg/m3 on Sunday, March 19, 2017 7:00 AM 13.7571 µg/m3 on Sunday, March 19, 2017 7:30 AM 13.6275 µg/m3 on Sunday, March 19, 2017 8:00 AM 13.4185 µg/m3 on Sunday, March 19, 2017 8:30 AM 13.2489 µg/m3 on Sunday, March 19, 2017 9:00 AM 13.0671 µg/m3 on Sunday, March 19, 2017 9:30 AM 12.9506 µg/m3 on Sunday, March 19, 2017 10:00 AM 12.6396 µg/m3 on Sunday, March 19, 2017 10:30 AM 12.3574 µg/m3 on Sunday, March 19, 2017 11:00 AM 12.3239 µg/m3 on Sunday, March 19, 2017 11:30 AM 12.2714 µg/m3 on Sunday, March 19, 2017 12:00 PM 12.0552 µg/m3 on Sunday, March 19, 2017 12:30 PM 11.8441 µg/m3 on Sunday, March 19, 2017 1:00 PM 11.7926 µg/m3 on Sunday, March 19, 2017 1:30 PM 11.5045 µg/m3 on Sunday, March 19, 2017 2:00 PM 11.0257 µg/m3 on Sunday, March 19, 2017 2:30 PM 10.8579 µg/m3 on Sunday, March 19, 2017 3:00 PM 10.6929 µg/m3 on Sunday, March 19, 2017 3:30 PM 10.6095 µg/m3 on Sunday, March 19, 2017 4:00 PM 10.2377 µg/m3 on Sunday, March 19, 2017 4:30 PM 10.0112 µg/m3 on Sunday, March 19, 2017 5:00 PM 9.9171 µg/m3 on Sunday, March 19, 2017 5:30 PM 9.9816 µg/m3 on Sunday, March 19, 2017 6:00 PM 9.6454 µg/m3 on Sunday, March 19, 2017 6:30 PM 9.5772 µg/m3 on Sunday, March 19, 2017 7:00 PM 9.4262 µg/m3 on Sunday, March 19, 2017 7:30 PM 9.4089 µg/m3 on Sunday, March 19, 2017 8:00 PM 9.1327 µg/m3 on Sunday, March 19, 2017 8:30 PM 9.0316 µg/m3 on Sunday, March 19, 2017 9:00 PM 8.9197 µg/m3 on Sunday, March 19, 2017 9:30 PM 8.7788 µg/m3 on Sunday, March 19, 2017 10:00 PM 8.6915 µg/m3 on Sunday, March 19, 2017 10:30 PM 8.5134 µg/m3 on Sunday, March 19, 2017 11:00 PM 8.4096 µg/m3 on Sunday, March 19, 2017 11:30 PM 8.4071 µg/m3 on Monday, March 20, 2017 12:00 AM 8.2466 µg/m3 on Monday, March 20, 2017 12:30 AM 8.1874 µg/m3 on Monday, March 20, 2017 1:00 AM 8.2137 µg/m3 on Monday, March 20, 2017 1:30 AM 8.1181 µg/m3 on Monday, March 20, 2017 2:00 AM 7.9775 µg/m3 on Monday, March 20, 2017 2:30 AM 7.9065 µg/m3 on Monday, March 20, 2017 3:00 AM 7.9344 µg/m3 on Monday, March 20, 2017 3:30 AM 7.8881 µg/m3 on Monday, March 20, 2017 4:00 AM 7.7603 µg/m3 on Monday, March 20, 2017 4:30 AM 7.6709 µg/m3 on Monday, March 20, 2017 5:00 AM 7.7363 µg/m3 on Monday, March 20, 2017 5:30 AM 7.7416 µg/m3 on Monday, March 20, 2017 6:00 AM 7.6607 µg/m3 on Monday, March 20, 2017 6:30 AM 7.6528 µg/m3 on Monday, March 20, 2017 7:00 AM 7.6123 µg/m3 on Monday, March 20, 2017 7:30 AM 7.6464 µg/m3 on Monday, March 20, 2017 8:00 AM 7.5801 µg/m3 on Monday, March 20, 2017 8:30 AM 7.4811 µg/m3 on Monday, March 20, 2017 9:00 AM 7.7046 µg/m3 on Monday, March 20, 2017 9:30 AM 7.7704 µg/m3 on Monday, March 20, 2017 10:00 AM 7.5618 µg/m3 on Monday, March 20, 2017 10:30 AM 7.7302 µg/m3 on Monday, March 20, 2017 11:00 AM 7.6963 µg/m3 on Monday, March 20, 2017 11:30 AM 7.6553 µg/m3 on Monday, March 20, 2017 12:00 PM 7.5899 µg/m3 on Monday, March 20, 2017 12:30 PM 7.4689 µg/m3 on Monday, March 20, 2017 1:00 PM 7.479 µg/m3 on Monday, March 20, 2017 1:30 PM 7.6652 µg/m3 on Monday, March 20, 2017 2:00 PM 7.5559 µg/m3 on Monday, March 20, 2017 2:30 PM 7.5851 µg/m3 on Monday, March 20, 2017 3:00 PM 7.6585 µg/m3 on Monday, March 20, 2017 3:30 PM 7.6533 µg/m3 on Monday, March 20, 2017 4:00 PM 7.7354 µg/m3 on Monday, March 20, 2017 4:30 PM 7.8849 µg/m3 on Monday, March 20, 2017 5:00 PM 7.8683 µg/m3 on Monday, March 20, 2017 5:30 PM 8.2783 µg/m3 on Monday, March 20, 2017 6:00 PM 8.2617 µg/m3 on Monday, March 20, 2017 6:30 PM 8.4036 µg/m3 on Monday, March 20, 2017 7:00 PM 8.5176 µg/m3 on Monday, March 20, 2017 7:30 PM 8.6713 µg/m3 on Monday, March 20, 2017 8:00 PM 8.7516 µg/m3 on Monday, March 20, 2017 8:30 PM 8.8835 µg/m3 on Monday, March 20, 2017 9:00 PM 8.9352 µg/m3 on Monday, March 20, 2017 9:30 PM 9.0626 µg/m3 on Monday, March 20, 2017 10:00 PM 9.1549 µg/m3 on Monday, March 20, 2017 10:30 PM 9.1994 µg/m3 on Monday, March 20, 2017 11:00 PM 9.2949 µg/m3 on Monday, March 20, 2017 11:30 PM 9.3353 µg/m3 on Tuesday, March 21, 2017 12:00 AM 9.3948 µg/m3 on Tuesday, March 21, 2017 12:30 AM 9.3938 µg/m3 on Tuesday, March 21, 2017 1:00 AM 9.4742 µg/m3 on Tuesday, March 21, 2017 1:30 AM 9.6347 µg/m3 on Tuesday, March 21, 2017 2:00 AM 9.6049 µg/m3 on Tuesday, March 21, 2017 2:30 AM 9.6574 µg/m3 on Tuesday, March 21, 2017 3:00 AM 9.7776 µg/m3 on Tuesday, March 21, 2017 3:30 AM 9.879 µg/m3 on Tuesday, March 21, 2017 4:00 AM 9.8819 µg/m3 on Tuesday, March 21, 2017 4:30 AM 9.8934 µg/m3 on Tuesday, March 21, 2017 5:00 AM 9.9487 µg/m3 on Tuesday, March 21, 2017 5:30 AM 10.085 µg/m3 on Tuesday, March 21, 2017 6:00 AM 10.0249 µg/m3 on Tuesday, March 21, 2017 6:30 AM 10.0838 µg/m3 on Tuesday, March 21, 2017 7:00 AM 10.1633 µg/m3 on Tuesday, March 21, 2017 7:30 AM 10.2248 µg/m3 on Tuesday, March 21, 2017 8:00 AM 10.3562 µg/m3 on Tuesday, March 21, 2017 8:30 AM 10.3087 µg/m3 on Tuesday, March 21, 2017 9:00 AM 10.423 µg/m3 on Tuesday, March 21, 2017 9:30 AM 10.15 µg/m3 on Tuesday, March 21, 2017 10:00 AM 10.2253 µg/m3 on Tuesday, March 21, 2017 10:30 AM 10.157 µg/m3 on Tuesday, March 21, 2017 11:00 AM 10.3066 µg/m3 on Tuesday, March 21, 2017 11:30 AM 10.3571 µg/m3 on Tuesday, March 21, 2017 12:00 PM 10.288 µg/m3 on Tuesday, March 21, 2017 12:30 PM 10.2763 µg/m3 on Tuesday, March 21, 2017 1:00 PM 10.2703 µg/m3 on Tuesday, March 21, 2017 1:30 PM 10.3047 µg/m3 on Tuesday, March 21, 2017 2:00 PM 10.378 µg/m3 on Tuesday, March 21, 2017 2:30 PM 10.432 µg/m3 on Tuesday, March 21, 2017 3:00 PM 10.559 µg/m3 on Tuesday, March 21, 2017 3:30 PM 10.6993 µg/m3 on Tuesday, March 21, 2017 4:00 PM 10.6208 µg/m3 on Tuesday, March 21, 2017 4:30 PM 10.712 µg/m3 on Tuesday, March 21, 2017 5:00 PM 10.8521 µg/m3 on Tuesday, March 21, 2017 5:30 PM 10.8093 µg/m3 on Tuesday, March 21, 2017 6:00 PM 12.0752 µg/m3 on Tuesday, March 21, 2017 6:30 PM 10.7875 µg/m3 on Tuesday, March 21, 2017 7:00 PM 12.0313 µg/m3 on Tuesday, March 21, 2017 7:30 PM 12.119 µg/m3 on Tuesday, March 21, 2017 8:00 PM 12.1658 µg/m3 on Tuesday, March 21, 2017 8:30 PM 12.2203 µg/m3 on Tuesday, March 21, 2017 9:00 PM 12.2481 µg/m3 on Tuesday, March 21, 2017 9:30 PM 12.1943 µg/m3 on Tuesday, March 21, 2017 10:00 PM 12.259 µg/m3 on Tuesday, March 21, 2017 10:30 PM 12.3431 µg/m3 on Tuesday, March 21, 2017 11:00 PM 12.3819 µg/m3 on Tuesday, March 21, 2017 11:30 PM 12.2722 µg/m3 on Wednesday, March 22, 2017 12:00 AM 12.269 µg/m3 on Wednesday, March 22, 2017 12:30 AM 12.1711 µg/m3 on Wednesday, March 22, 2017 1:00 AM 12.2589 µg/m3 on Wednesday, March 22, 2017 1:30 AM 12.0959 µg/m3 on Wednesday, March 22, 2017 2:00 AM 12.1874 µg/m3 on Wednesday, March 22, 2017 2:30 AM 12.0249 µg/m3 on Wednesday, March 22, 2017 3:00 AM 12.2303 µg/m3 on Wednesday, March 22, 2017 3:30 AM 12.3165 µg/m3 on Wednesday, March 22, 2017 4:00 AM 12.3562 µg/m3 on Wednesday, March 22, 2017 4:30 AM 12.7384 µg/m3 on Wednesday, March 22, 2017 5:00 AM 12.8814 µg/m3 on Wednesday, March 22, 2017 5:30 AM 13.2395 µg/m3 on Wednesday, March 22, 2017 6:00 AM 13.8442 µg/m3 on Wednesday, March 22, 2017 6:30 AM 13.8656 µg/m3 on Wednesday, March 22, 2017 7:00 AM 14.5112 µg/m3 on Wednesday, March 22, 2017 7:30 AM 14.8121 µg/m3 on Wednesday, March 22, 2017 8:00 AM 14.8748 µg/m3 on Wednesday, March 22, 2017 8:30 AM 15.4287 µg/m3 on Wednesday, March 22, 2017 9:00 AM 15.4544 µg/m3 on Wednesday, March 22, 2017 9:30 AM 16.035 µg/m3 on Wednesday, March 22, 2017 10:00 AM 15.9001 µg/m3 on Wednesday, March 22, 2017 10:30 AM 16.3841 µg/m3 on Wednesday, March 22, 2017 11:00 AM 15.9554 µg/m3 on Wednesday, March 22, 2017 11:30 AM 16.3967 µg/m3 on Wednesday, March 22, 2017 12:00 PM 16.7612 µg/m3 on Wednesday, March 22, 2017 12:30 PM 16.2013 µg/m3 on Wednesday, March 22, 2017 1:00 PM 16.3687 µg/m3 on Wednesday, March 22, 2017 1:30 PM 16.0372 µg/m3 on Wednesday, March 22, 2017 2:00 PM 16.2392 µg/m3 on Wednesday, March 22, 2017 2:30 PM 15.8375 µg/m3 on Wednesday, March 22, 2017 3:00 PM 15.9628 µg/m3 on Wednesday, March 22, 2017 3:30 PM 15.7941 µg/m3 on Wednesday, March 22, 2017 4:00 PM 15.8303 µg/m3 on Wednesday, March 22, 2017 4:30 PM 18.1671 µg/m3 on Wednesday, March 22, 2017 5:00 PM 16.2357 µg/m3 on Wednesday, March 22, 2017 5:30 PM 2.6709 µg/m3 on Sunday, March 19, 2017 1:00 AM 2.7231 µg/m3 on Sunday, March 19, 2017 1:30 AM 2.7936 µg/m3 on Sunday, March 19, 2017 2:00 AM 2.7017 µg/m3 on Sunday, March 19, 2017 2:30 AM 2.709 µg/m3 on Sunday, March 19, 2017 3:00 AM 2.7283 µg/m3 on Sunday, March 19, 2017 3:30 AM 2.7652 µg/m3 on Sunday, March 19, 2017 4:00 AM 2.7052 µg/m3 on Sunday, March 19, 2017 4:30 AM 2.6695 µg/m3 on Sunday, March 19, 2017 5:00 AM 2.6843 µg/m3 on Sunday, March 19, 2017 5:30 AM 2.7566 µg/m3 on Sunday, March 19, 2017 6:00 AM 2.6766 µg/m3 on Sunday, March 19, 2017 6:30 AM 2.6541 µg/m3 on Sunday, March 19, 2017 7:00 AM 2.6833 µg/m3 on Sunday, March 19, 2017 7:30 AM 2.6923 µg/m3 on Sunday, March 19, 2017 8:00 AM 2.7082 µg/m3 on Sunday, March 19, 2017 8:30 AM 2.6707 µg/m3 on Sunday, March 19, 2017 9:00 AM 2.7198 µg/m3 on Sunday, March 19, 2017 9:30 AM 2.7073 µg/m3 on Sunday, March 19, 2017 10:00 AM 2.6587 µg/m3 on Sunday, March 19, 2017 10:30 AM 2.5254 µg/m3 on Sunday, March 19, 2017 11:00 AM 2.6223 µg/m3 on Sunday, March 19, 2017 11:30 AM 2.674 µg/m3 on Sunday, March 19, 2017 12:00 PM 2.5825 µg/m3 on Sunday, March 19, 2017 12:30 PM 2.4716 µg/m3 on Sunday, March 19, 2017 1:00 PM 2.5779 µg/m3 on Sunday, March 19, 2017 1:30 PM 2.5644 µg/m3 on Sunday, March 19, 2017 2:00 PM 2.4003 µg/m3 on Sunday, March 19, 2017 2:30 PM 2.354 µg/m3 on Sunday, March 19, 2017 3:00 PM 2.353 µg/m3 on Sunday, March 19, 2017 3:30 PM 2.4021 µg/m3 on Sunday, March 19, 2017 4:00 PM 2.2556 µg/m3 on Sunday, March 19, 2017 4:30 PM 2.1829 µg/m3 on Sunday, March 19, 2017 5:00 PM 2.1875 µg/m3 on Sunday, March 19, 2017 5:30 PM 2.2762 µg/m3 on Sunday, March 19, 2017 6:00 PM 2.1505 µg/m3 on Sunday, March 19, 2017 6:30 PM 2.1339 µg/m3 on Sunday, March 19, 2017 7:00 PM 2.1161 µg/m3 on Sunday, March 19, 2017 7:30 PM 2.1993 µg/m3 on Sunday, March 19, 2017 8:00 PM 2.0498 µg/m3 on Sunday, March 19, 2017 8:30 PM 1.9802 µg/m3 on Sunday, March 19, 2017 9:00 PM 1.9814 µg/m3 on Sunday, March 19, 2017 9:30 PM 1.9694 µg/m3 on Sunday, March 19, 2017 10:00 PM 1.9009 µg/m3 on Sunday, March 19, 2017 10:30 PM 1.8462 µg/m3 on Sunday, March 19, 2017 11:00 PM 1.8358 µg/m3 on Sunday, March 19, 2017 11:30 PM 1.8552 µg/m3 on Monday, March 20, 2017 12:00 AM 1.7352 µg/m3 on Monday, March 20, 2017 12:30 AM 1.7093 µg/m3 on Monday, March 20, 2017 1:00 AM 1.7684 µg/m3 on Monday, March 20, 2017 1:30 AM 1.7381 µg/m3 on Monday, March 20, 2017 2:00 AM 1.6604 µg/m3 on Monday, March 20, 2017 2:30 AM 1.5865 µg/m3 on Monday, March 20, 2017 3:00 AM 1.6478 µg/m3 on Monday, March 20, 2017 3:30 AM 1.6527 µg/m3 on Monday, March 20, 2017 4:00 AM 1.5296 µg/m3 on Monday, March 20, 2017 4:30 AM 1.4316 µg/m3 on Monday, March 20, 2017 5:00 AM 1.538 µg/m3 on Monday, March 20, 2017 5:30 AM 1.5637 µg/m3 on Monday, March 20, 2017 6:00 AM 1.5045 µg/m3 on Monday, March 20, 2017 6:30 AM 1.4805 µg/m3 on Monday, March 20, 2017 7:00 AM 1.4592 µg/m3 on Monday, March 20, 2017 7:30 AM 1.508 µg/m3 on Monday, March 20, 2017 8:00 AM 1.4396 µg/m3 on Monday, March 20, 2017 8:30 AM 1.3139 µg/m3 on Monday, March 20, 2017 9:00 AM 1.3875 µg/m3 on Monday, March 20, 2017 9:30 AM 1.4853 µg/m3 on Monday, March 20, 2017 10:00 AM 1.2935 µg/m3 on Monday, March 20, 2017 10:30 AM 1.3234 µg/m3 on Monday, March 20, 2017 11:00 AM 1.3359 µg/m3 on Monday, March 20, 2017 11:30 AM 1.3273 µg/m3 on Monday, March 20, 2017 12:00 PM 1.2178 µg/m3 on Monday, March 20, 2017 12:30 PM 1.1919 µg/m3 on Monday, March 20, 2017 1:00 PM 1.2119 µg/m3 on Monday, March 20, 2017 1:30 PM 1.2478 µg/m3 on Monday, March 20, 2017 2:00 PM 1.184 µg/m3 on Monday, March 20, 2017 2:30 PM 1.1812 µg/m3 on Monday, March 20, 2017 3:00 PM 1.2528 µg/m3 on Monday, March 20, 2017 3:30 PM 1.2019 µg/m3 on Monday, March 20, 2017 4:00 PM 1.2251 µg/m3 on Monday, March 20, 2017 4:30 PM 1.2668 µg/m3 on Monday, March 20, 2017 5:00 PM 1.2595 µg/m3 on Monday, March 20, 2017 5:30 PM 1.3752 µg/m3 on Monday, March 20, 2017 6:00 PM 1.3759 µg/m3 on Monday, March 20, 2017 6:30 PM 1.3782 µg/m3 on Monday, March 20, 2017 7:00 PM 1.4572 µg/m3 on Monday, March 20, 2017 7:30 PM 1.5052 µg/m3 on Monday, March 20, 2017 8:00 PM 1.5138 µg/m3 on Monday, March 20, 2017 8:30 PM 1.562 µg/m3 on Monday, March 20, 2017 9:00 PM 1.5735 µg/m3 on Monday, March 20, 2017 9:30 PM 1.6538 µg/m3 on Monday, March 20, 2017 10:00 PM 1.68 µg/m3 on Monday, March 20, 2017 10:30 PM 1.6571 µg/m3 on Monday, March 20, 2017 11:00 PM 1.7369 µg/m3 on Monday, March 20, 2017 11:30 PM 1.7869 µg/m3 on Tuesday, March 21, 2017 12:00 AM 1.7987 µg/m3 on Tuesday, March 21, 2017 12:30 AM 1.749 µg/m3 on Tuesday, March 21, 2017 1:00 AM 1.8075 µg/m3 on Tuesday, March 21, 2017 1:30 AM 1.9191 µg/m3 on Tuesday, March 21, 2017 2:00 AM 1.8541 µg/m3 on Tuesday, March 21, 2017 2:30 AM 1.8289 µg/m3 on Tuesday, March 21, 2017 3:00 AM 1.9475 µg/m3 on Tuesday, March 21, 2017 3:30 AM 2.036 µg/m3 on Tuesday, March 21, 2017 4:00 AM 2.016 µg/m3 on Tuesday, March 21, 2017 4:30 AM 1.9952 µg/m3 on Tuesday, March 21, 2017 5:00 AM 1.9886 µg/m3 on Tuesday, March 21, 2017 5:30 AM 2.0788 µg/m3 on Tuesday, March 21, 2017 6:00 AM 2.0655 µg/m3 on Tuesday, March 21, 2017 6:30 AM 2.0424 µg/m3 on Tuesday, March 21, 2017 7:00 AM 2.1121 µg/m3 on Tuesday, March 21, 2017 7:30 AM 2.1611 µg/m3 on Tuesday, March 21, 2017 8:00 AM 2.1904 µg/m3 on Tuesday, March 21, 2017 8:30 AM 2.1513 µg/m3 on Tuesday, March 21, 2017 9:00 AM 2.225 µg/m3 on Tuesday, March 21, 2017 9:30 AM 2.1815 µg/m3 on Tuesday, March 21, 2017 10:00 AM 2.2365 µg/m3 on Tuesday, March 21, 2017 10:30 AM 2.1342 µg/m3 on Tuesday, March 21, 2017 11:00 AM 2.2359 µg/m3 on Tuesday, March 21, 2017 11:30 AM 2.2997 µg/m3 on Tuesday, March 21, 2017 12:00 PM 2.2102 µg/m3 on Tuesday, March 21, 2017 12:30 PM 2.1602 µg/m3 on Tuesday, March 21, 2017 1:00 PM 2.2213 µg/m3 on Tuesday, March 21, 2017 1:30 PM 2.261 µg/m3 on Tuesday, March 21, 2017 2:00 PM 2.2481 µg/m3 on Tuesday, March 21, 2017 2:30 PM 2.2248 µg/m3 on Tuesday, March 21, 2017 3:00 PM 2.3125 µg/m3 on Tuesday, March 21, 2017 3:30 PM 2.3236 µg/m3 on Tuesday, March 21, 2017 4:00 PM 2.3205 µg/m3 on Tuesday, March 21, 2017 4:30 PM 2.3032 µg/m3 on Tuesday, March 21, 2017 5:00 PM 2.3526 µg/m3 on Tuesday, March 21, 2017 5:30 PM 2.419 µg/m3 on Tuesday, March 21, 2017 6:00 PM 2.405 µg/m3 on Tuesday, March 21, 2017 6:30 PM 2.3786 µg/m3 on Tuesday, March 21, 2017 7:00 PM 2.4611 µg/m3 on Tuesday, March 21, 2017 7:30 PM 2.5304 µg/m3 on Tuesday, March 21, 2017 8:00 PM 2.5748 µg/m3 on Tuesday, March 21, 2017 8:30 PM 2.5348 µg/m3 on Tuesday, March 21, 2017 9:00 PM 2.5997 µg/m3 on Tuesday, March 21, 2017 9:30 PM 2.5958 µg/m3 on Tuesday, March 21, 2017 10:00 PM 2.6069 µg/m3 on Tuesday, March 21, 2017 10:30 PM 2.6213 µg/m3 on Tuesday, March 21, 2017 11:00 PM 2.6483 µg/m3 on Tuesday, March 21, 2017 11:30 PM 2.633 µg/m3 on Wednesday, March 22, 2017 12:00 AM 2.6033 µg/m3 on Wednesday, March 22, 2017 12:30 AM 2.5791 µg/m3 on Wednesday, March 22, 2017 1:00 AM 2.6126 µg/m3 on Wednesday, March 22, 2017 1:30 AM 2.5798 µg/m3 on Wednesday, March 22, 2017 2:00 AM 2.6103 µg/m3 on Wednesday, March 22, 2017 2:30 AM 2.5209 µg/m3 on Wednesday, March 22, 2017 3:00 AM 2.5817 µg/m3 on Wednesday, March 22, 2017 3:30 AM 2.6104 µg/m3 on Wednesday, March 22, 2017 4:00 AM 2.6254 µg/m3 on Wednesday, March 22, 2017 4:30 AM 2.7052 µg/m3 on Wednesday, March 22, 2017 5:00 AM 2.7502 µg/m3 on Wednesday, March 22, 2017 5:30 AM 2.8898 µg/m3 on Wednesday, March 22, 2017 6:00 AM 3.0655 µg/m3 on Wednesday, March 22, 2017 6:30 AM 3.0329 µg/m3 on Wednesday, March 22, 2017 7:00 AM 3.2804 µg/m3 on Wednesday, March 22, 2017 7:30 AM 3.3808 µg/m3 on Wednesday, March 22, 2017 8:00 AM 3.3622 µg/m3 on Wednesday, March 22, 2017 8:30 AM 3.5426 µg/m3 on Wednesday, March 22, 2017 9:00 AM 3.5622 µg/m3 on Wednesday, March 22, 2017 9:30 AM 3.8092 µg/m3 on Wednesday, March 22, 2017 10:00 AM 3.7476 µg/m3 on Wednesday, March 22, 2017 10:30 AM 3.8778 µg/m3 on Wednesday, March 22, 2017 11:00 AM 3.7588 µg/m3 on Wednesday, March 22, 2017 11:30 AM 3.9439 µg/m3 on Wednesday, March 22, 2017 12:00 PM 4.0762 µg/m3 on Wednesday, March 22, 2017 12:30 PM 3.9204 µg/m3 on Wednesday, March 22, 2017 1:00 PM 3.9761 µg/m3 on Wednesday, March 22, 2017 1:30 PM 3.8331 µg/m3 on Wednesday, March 22, 2017 2:00 PM 3.9456 µg/m3 on Wednesday, March 22, 2017 2:30 PM 3.7433 µg/m3 on Wednesday, March 22, 2017 3:00 PM 3.7473 µg/m3 on Wednesday, March 22, 2017 3:30 PM 3.6486 µg/m3 on Wednesday, March 22, 2017 4:00 PM 3.6034 µg/m3 on Wednesday, March 22, 2017 4:30 PM 5.2104 µg/m3 on Wednesday, March 22, 2017 5:00 PM 4.0282 µg/m3 on Wednesday, March 22, 2017 5:30 PM
Date & TimePM 2.5 24-hour Average (µg/m3)PM 10 24-hour Average (µg/m3)
3/22/2017 4:30:00 PM (MDT) 4.03 16.2357
3/22/2017 4:00:00 PM (MDT) 5.21 18.1671
3/22/2017 3:30:00 PM (MDT) 3.6 15.8303
3/22/2017 3:00:00 PM (MDT) 3.65 15.7941
3/22/2017 2:30:00 PM (MDT) 3.75 15.9628
3/22/2017 2:00:00 PM (MDT) 3.74 15.8375
3/22/2017 1:30:00 PM (MDT) 3.95 16.2392
3/22/2017 1:00:00 PM (MDT) 3.83 16.0372
3/22/2017 12:30:00 PM (MDT) 3.98 16.3687
3/22/2017 12:00:00 PM (MDT) 3.92 16.2013
3/22/2017 11:30:00 AM (MDT) 4.08 16.7612
3/22/2017 11:00:00 AM (MDT) 3.94 16.3967
3/22/2017 10:30:00 AM (MDT) 3.76 15.9554
3/22/2017 10:00:00 AM (MDT) 3.88 16.3841
3/22/2017 9:30:00 AM (MDT) 3.75 15.9001
3/22/2017 9:00:00 AM (MDT) 3.81 16.035
3/22/2017 8:30:00 AM (MDT) 3.56 15.4544
3/22/2017 8:00:00 AM (MDT) 3.54 15.4287
3/22/2017 7:30:00 AM (MDT) 3.36 14.8748
3/22/2017 7:00:00 AM (MDT) 3.38 14.8121
3/22/2017 6:30:00 AM (MDT) 3.28 14.5112
3/22/2017 6:00:00 AM (MDT) 3.03 13.8656
3/22/2017 5:30:00 AM (MDT) 3.07 13.8442
3/22/2017 5:00:00 AM (MDT) 2.89 13.2395
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