Niagara Falls Air Monitoring Site Trends (1987-2007)

Niagara Falls Acid Deposition Data, 1987 - 2007
Station	Year	Precip. in	pH	[SO4] ippm	[NO3] ippm	[NH4] ippm	SO4 Dep. kg/ha	NO3 Dep. kg/ha	NH4 Dep. kg/ha
Niagara Falls	1987	27.68	4.18	4.31	2.52	0.13	30.34	17.71
Niagara Falls	1988	27.70	4.37	4.09	2.10	0.47	28.79	14.77	3.33
Niagara Falls	1989	31.27	4.15	3.52	2.43	0.89	27.99	19.30	7.09
Niagara Falls	1990	35.62	4.07	3.65	2.13	0.59	33.02	19.31	5.36
Niagara Falls	1991	25.14	4.11	3.98	2.51	0.70	25.43	16.01	4.48
Niagara Falls	1992	32.87	4.12	3.49	2.20	0.52	29.14	18.39	4.31
Niagara Falls	1993	30.35	4.16	3.67	2.25	0.54	28.32	17.35	4.19
Niagara Falls	1994	26.76	4.18	4.12	2.42	0.54	28.00	16.48	3.66
Niagara Falls	1995	26.88	4.30	2.89	2.07	0.69	19.71	14.12	4.71
Niagara Falls	1996	25.48	4.34	3.12	1.71	0.69
Niagara Falls	1997	26.58	4.47	3.11	2.31	0.85
Niagara Falls	1998	26.01	4.66	4.96	3.07	0.67
Niagara Falls	1999	28.43	4.41	3.47	2.44	0.53	25.04	17.59	3.85
Niagara Falls	2000	32.12	4.34	3.32	2.63	0.60	27.12	21.44	4.89
Niagara Falls	2001	24.13	4.59	3.99	2.98	0.62	24.43	18.24	3.83
Niagara Falls	2002	30.85	4.84	2.96	2.70	0.68	23.94	21.47	5.49
Niagara Falls	2003	26.88	4.54	2.57	2.32	0.53	17.51	15.81	3.51
Niagara Falls	2004	30.17	4.63	2.57	1.75	0.47	19.55	13.22	3.38
Niagara Falls	2005	29.29	4.70	1.50	1.68	0.44	11.19	12.49	3.29
Niagara Falls	2006	30.94	4.70	2.27	1.77	0.42	17.54	13.96	3.57
Niagara Falls	2007	21.93	4.83	2.09	1.70	0.66	11.93	9.58	3.81

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.

pH / ion concentration at Niagara Falls, 1987-2007

precipitation / ion deposition at Niagara Falls, 1987-2007