Measurement	Region	Annual Average, 2000–2002	Annual Average, 2015–2017	Percent Change
Dry Nitrogen Deposition (kg-N/ha)	Mid-Atlantic	9.9	6.2	-37
	Midwest	7.0	5.0	-29
	North Central	4.7	4.7	0
	Northeast	6.1	3.5	-43
	Pacific	2.7	2.2	-19
	Rocky Mountain	2.3	2.0	-13
	South Central	5.8	4.9	-16
	Southeast	6.7	4.5	-33
Wet Nitrogen Deposition (kg-N/ha)	Mid-Atlantic	4.8	3.8	-21
	Midwest	5.9	5.1	-14
	North Central	4.5	4.9	9.0
	Northeast	4.8	3.2	-33
	Pacific	1.0	1.1	10
	Rocky Mountain	1.5	1.7	13
	South Central	4.0	4.2	5.0
	Southeast	4.0	3.5	-13
Total Deposition of Nitrogen (kg-N/ha)	Mid-Atlantic	15	10	-32
	Midwest	13	10	-21
	North Central	9.2	9.5	3.0
	Northeast	11	6.7	-39
	Pacific	3.7	3.3	-11
	Rocky Mountain	3.8	3.7	-3.0
	South Central	9.8	9.1	-7.0
	Southeast	11	8.0	-25
Total Deposition of Oxidized Nitrogen (kg-N/ha)	Mid-Atlantic	11	6.1	-46
	Midwest	8.8	4.9	-44
	North Central	4.6	3.4	-26
	Northeast	8.4	4.2	-50
	Pacific	2.7	1.7	-37
	Rocky Mountain	2.6	1.9	-27
	South Central	6.6	4.9	-26
	Southeast	8.1	4.6	-43
Total Deposition of Reduced Nitrogen (kg-N/ha)	Mid-Atlantic	3.3	3.9	18
	Midwest	4.2	5.2	24
	North Central	4.5	6.1	36
	Northeast	2.5	2.4	-4.0
	Pacific	1.1	1.6	45
	Rocky Mountain	1.2	1.8	50
	South Central	3.2	4.2	31
	Southeast	2.7	3.4	26
Dry Sulfur Deposition (kg-S/ha)	Mid-Atlantic	11	1.7	-84
	Midwest	8.2	1.8	-78
	North Central	1.8	0.80	-56
	Northeast	5.6	1.3	-77
	Pacific	0.60	0.30	-50
	Rocky Mountain	0.60	0.40	-33
	South Central	2.0	0.90	-55
	Southeast	4.6	1.0	-78
Wet Sulfur Deposition (kg-S/ha)	Mid-Atlantic	6.0	1.8	-70
	Midwest	5.5	2.1	-62
	North Central	2.3	1.4	-39
	Northeast	5.1	1.5	-71
	Pacific	0.60	0.40	-33
	Rocky Mountain	0.70	0.60	-14
	South Central	3.8	2.7	-29
	Southeast	4.8	2.1	-56
Total Deposition of Sulfur (kg-S/ha)	Mid-Atlantic	17	3.5	-79
	Midwest	14	3.9	-72
	North Central	4.1	2.1	-49
	Northeast	11	2.7	-75
	Pacific	1.2	0.80	-33
	Rocky Mountain	1.3	0.90	-31
	South Central	5.8	3.6	-38
	Southeast	9.4	3.1	-67