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High Ozone Values During 2021

8-Hour Averages

Values (in bold) below are maximum daily 8-hour ozone concentrations, measured in parts per million (ppm), exceeding the 2015 federal standard of 0.070 ppm.

Note: The column labeled 4th Max indicates the 4th highest 8-hour average for all days to date, not just the "high" days listed. Data displayed on this page and within the attached documentation are preliminary and subject to change. For validated data, contact the Bureau of Air Quality Surveillance at (518) 402-8508.

Eight Hour Ozone Averages Greater than 0.070 ppm for NYC Metro Area during 2021
Station County NY State ID 4th Max 19 - May 20 - May 21 - May 5 - June 6 - June 18 - Jun 19 - Jun 29 - Jun 30 - Jun
Babylon Suffolk 5150-02 0.066 0.064 0.042 0.042 0.074 0.079 0.063 0.072 0.052 0.054
Holtsville Suffolk 5151-10 0.062 0.056 0.041 0.039 0.069 0.071 0.062 0.069 0.050 0.052
Riverhead Suffolk 5155-01 0.064 0.056 0.041 0.041 0.073 0.070 0.063 0.068 0.062 0.062
Flax Pond Suffolk 5151-12 0.065 0.059 0.044 0.046 N/A N/A 0.065 0.070 0.063 0.072
CCNY New York 7093-25 0.067 0.060 N/A N/A 0.067 0.076 0.069 0.057 0.073 0.056
Pfizer Lab Bronx 7094-10 0.067 0.061 0.042 0.043 0.071 0.074 0.067 0.058 0.069 0.060
IS 52 Bronx 7094-07 0.066 0.061 0.040 0.041 0.070 0.074 0.066 0.058 0.069 0.061
Queens College 2 Queens 7096-15 0.068 0.068 0.040 0.044 0.078 0.074 0.065 0.069 0.055 0.070
Fresh Kills West Richmond 7097-01 0.063 0.068 0.042 0.047 0.006 N/A 0.071 0.059 0.062 0.056
White Plains Westchester 5902-04 0.065 0.059 0.049 0.048 0.067 0.067 0.065 0.053 0.067 0.060
Rockland County Rockland 4353-02 0.061 0.059 0.049 0.065 0.058 0.061 0.070 0.048 0.053 0.052

Eight Hour Ozone Averages Greater than 0.070 ppm for Upstate NY during 2021
Station County NY State ID 4th Max 19 - May 20 - May 21 - May 5 - June 6 - June 18 - Jun 19 - Jun 29 - Jun 30 - Jun
ValleyCentral Orange 3527-01 0.059 0.057 0.058 0.065 0.060 0.056 0.062 0.048 0.052 0.042
Millbrook Dutchess 1328-01 0.061 0.058 0.061 0.079 0.061 0.061 0.059 0.047 0.046 0.043
Mt. Ninham Putnam 3951-01 0.063 0.059 0.059 0.074 0.061 0.060 0.063 0.051 0.051 0.048
Loudonville Albany 0101-33 0.062 0.052 0.059 0.067 0.062 0.062 0.045 N/A 0.043 0.044
Stillwater Saratoga 4567-01 0.060 0.048 0.059 0.068 0.065 0.062 0.056 0.053 0.044 0.039
Whiteface Summit Essex 1567-03 0.066 0.061 0.061 0.068 0.071 0.069 0.060 0.049 0.044 0.040
Whiteface Base Essex 1567-04 0.065 0.052 0.055 0.065 0.067 0.066 0.056 0.046 0.044 0.040
Piseco Lake Hamilton 2050-01 0.060 0.054 0.054 0.063 0.070 0.070 0.054 0.047 0.040 0.039
Perch River Jefferson 2223-01 0.067 0.051 0.053 0.068 0.069 0.067 0.051 0.058 0.049 0.046
East Syracuse Onondaga 3353-09 0.067 0.062 0.067 0.069 0.069 0.068 0.055 0.054 0.044 0.037
Fulton Oswego 3754-01 0.066 0.058 0.064 0.066 0.069 0.067 0.051 0.054 0.046 0.044
Rochester 2 Monroe 2701-22 0.066 0.060 0.067 0.065 0.069 0.065 0.048 0.056 0.052 0.043
Williamson Wayne 5863-01 0.065 0.061 0.061 0.070 0.069 0.065 0.045 0.058 0.051 0.046
Pinnacle Steuben 5001-04 0.060 0.060 0.062 0.059 0.059 0.055 0.056 0.042 0.040 0.031
Amherst Erie 1451-03 0.068 0.071 0.069 0.067 0.070 0.063 0.057 0.054 0.053 0.043
Middleport Niagara 3120-02 0.066 0.064 0.073 0.061 0.067 0.061 0.053 0.054 0.047 0.043
Dunkirk Chautauqua 0601-04 0.066 0.064 0.072 0.070 0.070 0.061 0.053 0.050 0.054 0.043

This table is provided for your convenience - 2021 High Ozone Values (PDF)

Previous years:

2020 High Ozone Values (PDF)

2019 High Ozone Values (PDF)

2018 High Ozone Values (PDF)

For information about other monitored air pollutants and a comparison of monitored results to the appropriate NAAQS, you are encouraged to visit the data pages of our most recent Ambient Air Quality Report.


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