NYC 9/11 Public Portal Document
NITRIC OXIDE & NITROGEN DIOXIDE - Continuous Chemiluminescence
NYSDEC Region 2
Metropolitan Air Quality Control Region
Annual Averages 1989 through 1999
Bronx Sites Nitric Oxide - Annual Arithmetic Mean (ppm)
Station Site No. 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999
Morrisania 7094-05 .048 (.049) (.045) (.033) .040 .032 .032 .027 .027 .031
Botanical Gardens 7094-06 .024 .023 .023 .022 .024
Nitrogen Dioxide - Annual Arithmetic Mean (ppm) - Primary Standard
(12 month average not to exceed 0.05 PPM *)
Station Site No. 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999
Morrisania 7094-05N .039 .039 (-037) (.037) .039 .036 .036 .035 .036 .033
Botanical Gardens 7094-06 .031 .032 .030 .030 .029
Comparison Between NYS Ambient Air Quality and Ambient Air Quality Standards for Calendar Year 1999
Nitric Oxide One-Hour Averages Nitrogen Dioxide One-Hour Averages
Observations I Highest Values, PPM Observations Highest Values, PPM
% %
Station Site No. Total Avail jnJ 2nd
1- Total Avail 1" 3''’
Morrisania 7094-05 8,467 97 .616 .489 .477 8,469 97 .108 .107 .100
[02/16, [02/16, [10/08, [07/19, [02/16, [02/16,
10] 11] 08] 11] 11] 10]
Botanical Gardens 7094-06 8,598 98 .538 .529 .525 8,599 98 .106 .093 .091
[10/29, [12/08, [02/16, [02/16, [06/22, [06/22,
23] 21] 10] 10] 22] 23]
(Annual Means in parentheses are based on less than 75% available data) N=NAMS (National Air Monitoring Station) [Date of Occurrence, Hour]
•New York and Federal Ambient Air Quality Standard -b Denotes a contravention of NYS/Federal AAQS
NYC-WTC_000186104
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