N.H. Code Admin. R. Env-A 306.01

Current through Register No. 25, June 20, 2024

Section Env-A 306.01 - Primary and Secondary Ambient Air Quality Standards for Nitrogen Dioxide (NO[2])

The primary and secondary ambient air quality standards for nitrogen dioxide (NO₂), CAS # 10102-44-0, shall be as follows:

(a) The annual primary ambient air quality standard for NO₂ shall be 53 ppb, annual average concentration;

(b) The 1-hour primary ambient air quality standard for NO₂ shall be 100 ppb, 1-hour average concentration; and

(c) The secondary ambient air quality standard for NO₂ shall be 0.053 ppm, equivalent to 100 µg/m³,annual arithmetic mean concentration.

N.H. Code Admin. R. Env-A 306.01

#6227, eff 4-25-96; ss by #8054, eff 2-28-04; ss by #10173, eff 9-1-12

Amended by Volume XLII Number 23, Filed June 9, 2022, Proposed by #13382, Effective 5/25/2022, Expires 5/25/2032