Table 3.1: Summary data for NO₂ monitoring in Auckland

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	1992	1993	1994	1995	1996	1997	1998	1999	2000	2001
One-hour average NO₂ concentrations, Penrose (ACI) and One Tree Hill (1996)
% valid data					21%				11%	84%
Hours >200 gm^-3					0				0	0
99.9 %ile mgm^-3					53				67	109
Maximum mgm^-3					56				68	148
24-hour average NO₂ concentrations, Penrose (ACI) and One Tree Hill (1996)
% valid data					21%				11%	88%
Days >100 gm^-3					0				0	0
99.9 %ile gm^-3					24				33	59
Maximum gm^-3					25				33	65
One-hour average NO₂ concentrations, Dominion Road (1994 and 1995) and Khyber Pass Road
% valid data			44%	80%			72%	95%	92%	98%
Hours >200 gm^-3			13	0			20	24	20	54
Days exceeded			5	0			14	20	14	28
99.9 %ile mgm^-3			204	127			212	212	220	234
Maximum mgm^-3			363	162			418	246	434	277
24-hour average NO₂ concentrations, Dominion Road (1994 and 1995) and Khyber Pass Road
% valid data			43%	76%			71%	93%	90%	95%
Days >100 gm^-3			0	0			29	16	23	19
99.9 %ile gm^-3			80	75			112	114	118	121
Maximum gm^-3			80	76			117	119	122	135
One-hour average NO₂ concentrations, Penrose
% valid data	92%	99%	77%	90%	89%	97%	99%	91%	89%	87%
Hours >200 gm^-3	0	0	0	0	0	0	0	0	0	7.5
Days exceeded	0	0	0	0	0	0	0	0	0	5
99.9 %ile mgm^-3	89	104	59	70	87	78	76	79	86	189
Maximum mgm^-3	148	128	67	83	114	97	155	117	170	311
24-hour average NO₂ concentrations, Penrose
% valid data	92%	98%	74%	89%	87%	97%	99%	90%	88%	86%
Days >100 gm^-3	0	0	0	0	0	0	0	0	0	0
99.9 %ile gm^-3	51	44	41	49	56	46	47	53	54	73
Maximum gm^-3	53	49	44	51	67	68	51	58	57	93
One-hour average NO₂ concentrations, Mt Eden
% valid data	69%	44%	77%	99%	92%	95%	96%	99%	97%	95%
Hours >200 gm^-3	0	0	0	0	0	0	0	0	0	0
99.9 %ile mgm^-3	88	47	110	66	75	65	59	62	60	67
Maximum mgm^-3	198	52	144	71	89	85	87	71	77	74
24-hour average NO₂ concentrations, Mt Eden
% valid data	67%	41%	76%	98%	92%	93%	96%	98%	97%	95%
Days >100 gm^-3	0	0	0	0	0	0	0	0	0	0
99.9 %ile gm^-3	33	31	61	41	45	42	34	40	39	43
Maximum gm^-3	34	31	74	45	48	45	39	45	42	44
One-hour average NO₂ concentrations, Musick Point
% valid data					32%	79%	59%	72%	71%	95%
Hours >200 gm^-3					0	0	0	0	0	0
99.9 %ile mgm^-3					55	70	71	67	64	68
Maximum mgm^-3					58	74	137	89	67	76
24-hour average NO₂ concentrations, Musick Point
% valid data					33%	79%	59%	72%	70%	94%
Days >100 gm^-3					0	0	0	0	0	0
99.9 %ile gm^-3					27	41	39	40	29	42
Maximum gm^-3					29	42	41	45	30	46

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Table 3.1: Summary data for NO2 monitoring in Auckland

Table 3.1: Summary data for NO₂ monitoring in Auckland