Grafton Lake/Dyken Pond Air Monitoring Site Trends (1987-2007)

Grafton Lakes (Dyken Pond) 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
Dyken Pond	1987
Dyken Pond	1988	44.55	4.23	2.82	1.69	0.24
Dyken Pond	1989	45.45	4.34	1.97	1.51	0.40	22.73	17.45	4.59
Dyken Pond	1990	53.54	4.37	1.80	1.22	0.27	24.53	16.57	3.72
Dyken Pond	1991	40.86	4.28	2.27	1.46	0.37	23.56	15.13	3.82
Dyken Pond	1992	30.66	4.31	2.12	1.58	0.35	16.51	12.28	2.70
Dyken Pond	1993	35.24	4.33	2.07	1.44	0.37	18.53	12.85	3.33
Dyken Pond	1994	36.98	4.41	2.12	1.31	0.44	19.93	12.32	4.12
Dyken Pond	1995	37.10	4.45	1.54	1.38	0.40	14.50	12.97	3.73
Dyken Pond	1996	49.07	4.50	1.29	1.11	0.31	16.12	13.82	3.88
Dyken Pond	1997	31.22	4.38	1.54	1.31	0.37	12.21	10.35	2.90
Dyken Pond	1998	28.62	4.42	1.77	1.45	0.44	12.84	10.54	3.16
Dyken Pond	1999	48.52	4.53	1.13	1.07	0.22	13.98	13.15	2.70
Dyken Pond	2000	49.96	4.42	1.44	1.40	0.30	18.24	17.70	3.80
Grafton	2001	31.95	4.40	1.31	1.53	0.28	10.65	12.39	2.23
Grafton	2002	51.51	4.54	1.31	1.27	0.23	17.18	16.61	3.06
Grafton	2003	48.99	4.62	1.02	1.17	0.54	12.30	14.14	6.76
Grafton	2004	46.42	4.62	1.33	1.25	0.37	15.62	14.76	4.33
Grafton	2005	55.99	4.77	0.83	1.20	0.42	11.25	16.07	5.29
Grafton	2006	49.54	4.75	1.03	0.76	0.21	13.10	9.74	2.74
Grafton	2007	43.65	4.56	1.76	1.13	0.40	19.42	12.35	4.63

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 (Grafton Lakes / Dyken Pond, 1987-2007)

precipitation / ion deposition, Grafton 1987-2007