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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