Table 3 - Ambient Air Quality Data
Massachusetts Nitrogen Dioxide

Map of annual average NO2 concentration

Annual average nitrogen dioxide (NO₂) concentration in ppm for sites in Massachusetts. The annual average NO₂ standard is 0.05 ppm.

NAAQS = 0.05 ppm

Graph of annual arithmetic mean NO2 vs. year

Units: 007 ppm

									MAX 1-HR		MAX 24-HR
Site ID	P O C	M T	City	County	Address	YR	REP ORG	# OBS	1ST	2ND	1ST	2ND	ARIT MEAN	METH
25-001-0002	1	U	Truro	Barnstable	Fox Bottom Area - Cape Cod	97	001	3762	0.048	0.047			0.008?	74
25-005-1005	1	8	Easton	Bristol	1 Borderland St.	97	001	8531	0.05	0.048			0.009	74
25-009-2006	1	8	Lynn	Essex	390 Parkland Ave. (Lynn Water Treatment)	97	001	8177	0.064	0.063			0.015	82
25-009-4004	1	8	Newbury	Essex	Sunset Boulevard	97	001	8143	0.05	0.042			0.007	0
25-013-0003	1	8	Agawam	Hampden	152 South Westfield Street, Feeding Hills	97	001	8607	0.065	0.064			0.011	74
25-013-0008	1	8	Chicopee	Hampden	Anderson Road Air Force Base	97	001	8175	0.07	0.065			0.012	82
25-013-0016	1	2	Springfield	Hampden	Liberty Street Parking Lot	97	001	7985	0.074	0.068			0.022	0
25-015-4002	1	8	Ware	Hampshire	Quabbin Summit	97	001	7793	0.054	0.053			0.009	82
25-025-0002	1	3	Boston	Suffolk	Kenmore Square, 590 Commonwealth Avenue	97	001	8126	0.134	0.089			0.03	82
25-025-0021	1	1	Boston	Suffolk	340 Breman Street, East Boston	97	001	8505	0.081	0.079			0.27	74
25-025-0040	1	4	Boston	Suffolk	531A East First Street	97	001	8231	0.081	0.08			0.22	74
25-025-1003	1	1	Chelsea	Suffolk	Powder Horn Hill	97	001	7795	0.081	0.08			0.22	0
25-027-0020	1	2	Worcester	Worcester	Central Street Fire Station	97	001	7442	0.095	0.09			0.19	82

? indicates that the mean does not satisfy summary criteria

Steven McDougall / swmcd@theworld.com / 1998 September 27