Westfield Air Monitoring Site Trends (1987-2006)

Westfield Acid Deposition Data, 1987 - 2006
Station	Year	Precip. in	pH	[SO4] ippm	[NO3] ippm	[NH4] ippm	SO4 Dep. kg/ha	NO3 Dep. kg/ha	NH4 Dep. kg/ha
Westfield	87	40.96	4.23	4.53	2.97	0.26
Westfield	88	41.20	4.32	3.30	2.11	0.38	34.55	22.08	3.98
Westfield	89	38.42	4.16	3.09	2.31	0.55
Westfield	90	52.05	4.16	2.96	1.92	0.40	39.16	25.39	5.30
Westfield	91	34.00	4.17	3.06	2.39	0.50	26.42	20.62	4.33
Westfield	92	36.20	4.18	3.15	2.41	0.51	28.96	22.11	4.68
Westfield	93	37.68	4.17	3.38	2.25	0.46	32.33	21.51	4.44
Westfield	94	34.69	4.24	3.35	2.28	0.81	29.54	20.13	7.15
Westfield	95	33.23	4.24	2.62	2.22	0.49	22.10	18.71	4.13
Westfield	96	48.48	4.20	2.80	1.92	0.43	34.43	23.69	5.27
Westfield	97	38.57	4.23	2.61	2.49	0.60	26.94	25.63	6.13
Westfield	98	30.44	4.27	2.55	2.36	0.57	19.71	18.21	4.41
Westfield	99	36.10	4.23	2.61	2.48	0.41	23.90	22.77	3.74
Westfield	00	44.32	4.22	2.32	2.44	0.54	26.11	27.46	6.03
Westfield	01	36.35	4.26	2.26	2.43	0.50	20.89	22.43	4.60
Westfield	02	50.75	4.28	2.54	2.54	0.57	32.73	32.73	7.29
Westfield	03	48.25	4.33	1.95	2.57	0.46	23.99	30.58	5.65
Westfield	04	48.42	4.43	1.96	1.96	0.45	24.08	24.02	5.50
Westfield	05	43.43	4.41	1.96	2.13	0.49	21.74	23.46	5.43
Westfield	06	50.10	4.44	2.01	1.58	0.37	25.57	19.97	4.74

Blanks indicate that the rainfall criteria were not satisfied. That is, analysis of at least 75% of the annual and 50% of the quarterly precipitation.