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Westfield Air Monitoring Site Trends (1987-2007)

Westfield 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
Westfield 1987 40.96 4.23 4.53 2.97 0.26
Westfield 1988 41.20 4.32 3.30 2.11 0.38 34.55 22.08 3.98
Westfield 1989 38.42 4.16 3.09 2.31 0.55
Westfield 1990 52.05 4.16 2.96 1.92 0.40 39.16 25.39 5.30
Westfield 1991 34.00 4.17 3.06 2.39 0.50 26.42 20.62 4.33
Westfield 1992 36.20 4.18 3.15 2.41 0.51 28.96 22.11 4.68
Westfield 1993 37.68 4.17 3.38 2.25 0.46 32.33 21.51 4.44
Westfield 1994 34.69 4.24 3.35 2.28 0.81 29.54 20.13 7.15
Westfield 1995 33.23 4.24 2.62 2.22 0.49 22.10 18.71 4.13
Westfield 1996 48.48 4.20 2.80 1.92 0.43 34.43 23.69 5.27
Westfield 1997 38.57 4.23 2.61 2.49 0.60 26.94 25.63 6.13
Westfield 1998 30.44 4.27 2.55 2.36 0.57 19.71 18.21 4.41
Westfield 1999 36.10 4.23 2.61 2.48 0.41 23.90 22.77 3.74
Westfield 2000 44.32 4.22 2.32 2.44 0.54 26.11 27.46 6.03
Westfield 2001 36.35 4.26 2.26 2.43 0.50 20.89 22.43 4.60
Westfield 2002 50.75 4.28 2.54 2.54 0.57 32.73 32.73 7.29
Westfield 2003 48.25 4.33 1.95 2.57 0.46 23.99 30.58 5.65
Westfield 2004 48.42 4.44 1.89 1.84 0.45 23.14 22.41 5.50
Westfield 2005 43.43 4.41 1.96 2.13 0.49 21.74 23.46 5.43
Westfield 2006 50.10 4.44 2.01 1.58 0.37 25.57 19.97 4.74
Westfield 2007 37.28 4.49 2.03 1.76 0.52 19.33 16.59 4.98

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, Westfield 1987-2007
precipitation / ion deposition, Westfield 1987-2007