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		New York State Standards ¹
		Level ³	Statistic ²	Level	Statistic	Level	Statistic
Carbon Monoxide	8-hour	9 ppm	Maximum	None		9 ppm	Maximum
Carbon Monoxide	1-hour	35 ppm	Maximum	None		35 ppm	Maximum
Lead ⁴	Rolling 3 month average	0.15 µg/m³	Maximum	Same as Primary		None
Nitrogen Dioxide	Annual	0.053 ppm	Arithmetic Mean	Same as Primary		0.05 ppm	Arithmetic Mean
Total Suspended Particulates (TSP) ⁵	12 consecutive months	None		None		75 µg/m³	Geometric Mean
Total Suspended Particulates (TSP) ⁵	24-hours	260 µg/m³	Maximum	150 µg/m³	Maximum	250 µg/m³	Maximum
Particulate Matter (PM₁₀) ⁶	24-hour	150 µg/m³	Maximum	Same as Primary		None
Particulate Matter (PM_2.5)	Annual	15 µg/m³	Arithmetic Mean	Same as Primary		None
Particulate Matter (PM_2.5)	24-hour	35 µg/m³ ⁷	3 year avg	Same as Primary		None
Ozone ⁸	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	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	None		0.14 ppm	Maximum
	3-hour	None		0.5 ppm	Maximum	0.50 ppm	Maximum
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, but is currently being applied to determine compliance status. The 0.15 µg/m³ standard is effective 1/12/2009 and replaces the previous level of 1.5 µg/m³ .
5	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 While these TSP standards have been superseded by the above PM₁₀ standards, TSP measurements may still serve as surrogates to PM₁₀ measurements in the determination of compliance status.
6	Federal standard for PM₁₀ not yet officially adopted by NYS, but is currently being applied to determine compliance status.
7	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.
8	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).