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Ambient Air Quality Standards

New York State and Federal Standards

Pollutant Avg. Period Federal Air Quality Standards New York State Standards 1
Primary Standard Secondary Standard
Level 3 Statistic 2 Level Statistic Level Statistic
Carbon Monoxide 8-hour 9 ppm Maximum None 9 ppm Maximum
1-hour 35 ppm Maximum 35 ppm Maximum
Lead 4 Quarterly average 1.5 µg/m³, effective
until 12/31/12
Maximum Same as Primary None
Rolling 3 month average
(2008 standard)
0.15 µg/m³,
effective 1/1/13
Maximum Same as Primary None
Nitrogen Dioxide Annual 0.053 ppm Arithmetic Mean Same as Primary 0.05 ppm Arithmetic Mean
1-hour 0.100 ppm 5 3 year avg 0.053 ppm Arithmetic Mean None
Total Suspended Particulates (TSP) 6 12 consecutive months None None 75 µg/m³ Geometric Mean
24-hours 260 µg/m³ Maximum 150 µg/m³ Maximum 250 µg/m³ Maximum
Particulate Matter (PM10) 7 24-hour 150 µg/m³ Maximum Same as Primary None
Particulate Matter (PM2.5) Annual 12 µg/m³ Arithmetic Mean Same as Primary None
24-hour 35 µg/m³ 8 3 year avg Same as Primary
Ozone 9 8-hour (2008 std) 0.075 ppm 3 year avg Same as Primary None
8-hour (1997 std) 0.08 ppm 3 year avg Same as Primary 0.08 ppm Maximum
1-hour 0.12 ppm Not Applicable in NYS 10
Same as Primary 0.12 ppm Maximum
Sulfur Dioxide Annual 0.03 ppm Arithmetic Mean None 0.03 ppm Arithmetic Mean
24-hour 0.14 ppm Maximum 0.14 ppm Maximum
3-hour None 0.5 ppm Maximum 0.50 ppm Maximum
1-hour 75 ppb 3 year avg 11 None None
Hydrocarbons (non-methane) 3-hour (6-9 am) None None 0.24 ppm Maximum

Footnotes

Number Description
1 New York State also has standards for beryllium, fluorides, hydrogen sulfide, and settleable particulates (dustfall). Ambient monitoring for these pollutants is not currently conducted.
2 All maximum values are concentrations not to be exceeded more than once per calendar year. (Federal 1 hour Ozone Standard not to be exceeded more than three days in three calendar years).
3 Gaseous concentrations for Federal standards are corrected to a reference temperature of 25°C and to a reference pressure of 760 millimeters of mercury.
4 Federal standard for lead not yet officially adopted by NYS. Based upon the November 22, 2011 EPA designation for areas of New York State, which became effective on 12/31/11, the 0.15 µg/m³ standard will be effective throughout New York State on 1/1/2013 will replace the previous level of 1.5 µg/m³. The 1978 lead standard (1.5 µg/m³ as a quarterly average) remains in effect until one year after an area is designated for the 2008 standard (12/31/12 throughout New York State).
5 The 0.100 ppm standard is effective 1/22/2010. To attain this standard, the 3-year average of the 98th percentile of the daily maximum 1-hour average within an area must not exceed 0.100 ppm.
6 New York State also has 30, 60, and 90-day standards as well as geometric mean standards of 45, 55, and 65 µg/m³ in Part 257 of NYCRR. While these TSP standards have been superseded by the above PM10 standards, TSP measurements may still serve as surrogates to PM10 measurements in the determination of compliance status.
7 Federal standard for PM10 not yet officially adopted by NYS, but is currently being applied to determine compliance status.
8 Federal standard was changed from 65 to 35 µg/m³ on December 17, 2006. Compliance with the Federal standard is determined by using the average of 98th percentile 24 hour value during the past three years, which can not exceed 35 µg/m³.
9 Former NYS Standard for ozone of 0.08 PPM was not officially revised via regulatory process to coincide with the Federal standard of 0.12 PPM which is currently being applied by NYS to determine compliance status. Compliance with the Federal 8 hour standards is determined by using the average of the 4th highest daily value during the past three years - which can not exceed 0.084 PPM or 0.075 PPM, effective May 27, 2008).
10 (a) EPA revoked the 1-hour ozone standard in all areas, although some areas have continuing obligations under that standard ("anti-backsliding").
(b) The standard is attained when the expected number of days per calendar year with maximum hourly average concentrations above 0.12 ppm is < 1.
11 Final rule signed June 2, 2010. To attain this standard, the 3-year average of the 99th percentile of the daily maximum 1-hour average at each monitor within an area must not exceed 75 ppb.