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Air Resource Management
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Data on this page are updated daily when complete data are received. It is important to note that the ozone monitoring data less than three months old viewed on this website have generally not been verified and checked for quality assurance in accordance with federal requirements. |
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More Details about: Sydney
Ad Hoc Reporting
AQS # L057-3002
Sydney
10 Highest Daily Averages for Year 2021
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CO Averages CO data below are shown in Parts Per Million (PPM) |
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Date |
Max 8 Hour Average |
1 Hour Average |
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| DEC-04 | 0.5 | 0.627 | |||
| DEC-03 | 0.5 | 0.445 | |||
| DEC-06 | 0.5 | 0.449 | |||
| DEC-07 | 0.5 | 0.501 | |||
| DEC-26 | 0.5 | 0.573 | |||
| NOV-15 | 0.5 | 0.500 | |||
| DEC-25 | 0.5 | 0.425 | |||
| JAN-19 | 0.5 | 0.467 | |||
| DEC-27 | 0.4 | 0.492 | |||
| NOV-16 | 0.4 | 0.488 | |||
Date |
Max 1 Hour Average |
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| APR-17 | 0.689 | ||||
| DEC-04 | 0.627 | ||||
| JAN-21 | 0.626 | ||||
| DEC-26 | 0.573 | ||||
| AUG-02 | 0.506 | ||||
| DEC-07 | 0.501 | ||||
| NOV-15 | 0.500 | ||||
| FEB-25 | 0.497 | ||||
| DEC-27 | 0.492 | ||||
| NOV-16 | 0.488 | ||||
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NO2 Averages NO2 data below are shown in Parts Per Billion (PPB) |
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| This site did not monitor NO2 during 2021. | |||||
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Ozone Averages Ozone data below are shown in Parts Per Billion (PPB) |
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Date |
Max 8 Hour Average |
1 Hour Average |
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| APR-13 | 63 | 71 | |||
| MAY-08 | 62 | 67 | |||
| APR-22 | 59 | 66 | |||
| APR-08 | 58 | 65 | |||
| OCT-27 | 58 | 75 | |||
| APR-07 | 57 | 60 | |||
| MAY-07 | 57 | 60 | |||
| MAR-05 | 55 | 60 | |||
| APR-05 | 55 | 60 | |||
| APR-14 | 55 | 58 | |||
Date |
Max 1 Hour Average |
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| OCT-27 | 75 | ||||
| APR-13 | 71 | ||||
| MAY-08 | 67 | ||||
| MAY-28 | 67 | ||||
| APR-22 | 66 | ||||
| APR-08 | 65 | ||||
| SEP-10 | 64 | ||||
| APR-06 | 63 | ||||
| OCT-18 | 62 | ||||
| DEC-04 | 62 | ||||
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PM 2.5 Averages PM 2.5 data below are shown in Micrograms Per Cubic Meter (μg/m3) |
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Date |
Daily Average |
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| JUL-05 | 27.2 | ||||
| AUG-25 | 18.8 | ||||
| JUN-19 | 17.9 | ||||
| FEB-04 | 17 | ||||
| SEP-07 | 16.9 | ||||
| JAN-19 | 16.3 | ||||
| DEC-04 | 16.3 | ||||
| JUL-04 | 16.2 | ||||
| JAN-17 | 15.6 | ||||
| APR-25 | 15.6 | ||||
| * = Value Not Available | |||||
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PM 10 Averages PM 10 data below are shown in Micrograms Per Cubic Meter (μg/m3) |
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| This site did not monitor PM 10 during 2021. | |||||
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SO2 Averages SO2 data below are shown in Parts Per Billion (PPB) |
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Date |
Max Daily (24-Hour) Average |
1 Hour Average |
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| OCT-02 | 4.520 | 43.875 | |||
| FEB-24 | 1.900 | 14.278 | |||
| APR-14 | 1.590 | 4.090 | |||
| FEB-22 | 1.430 | 3.470 | |||
| MAY-03 | 1.430 | 3.616 | |||
| MAR-23 | 1.380 | 5.203 | |||
| JAN-17 | 1.340 | 2.751 | |||
| JUL-31 | 1.330 | 2.541 | |||
| MAY-04 | 1.310 | 3.046 | |||
| JAN-30 | 1.230 | 3.343 | |||
Date |
Max 1 Hour Average |
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| OCT-02 | 43.875 | ||||
| FEB-24 | 14.278 | ||||
| MAR-23 | 5.203 | ||||
| APR-09 | 5.127 | ||||
| JUL-11 | 4.657 | ||||
| FEB-04 | 4.338 | ||||
| OCT-03 | 4.193 | ||||
| MAR-27 | 4.134 | ||||
| OCT-22 | 4.125 | ||||
| APR-14 | 4.090 | ||||
| * = Value Not Available | |||||
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| Federal Air Quality Standard |
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