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					  Estimated Nitrogen and Phosphorus Loads and Yields Generated within
                                States
Table 1. Estimated state-wide nitrogen (N) and phosphorus (P) loads and yields, as predicted by
the 2002 regional USGS SPARROW models.

                       Total N load      Average N yield       Total P load      Average P yield
      State
                         (kg/yr)          (kg/yr/km2)            (kg/yr)          (kg/yr/km2)
Alabama                 68,505,533              512              6,380,725               48
Alaska*                   No data            No data              No data            No data
Arizona*                  No data            No data              No data            No data
Arkansas                97,015,656              704             15,215,749              110
California*          Insufficient data   Insufficient data   Insufficient data   Insufficient data
Colorado**              13,310,803               89              2,043,093               14
Connecticut             13,241,615             1,028            13,241,615             1,028
Delaware                 6,738,340             1,303             6,738,340             1,303
Florida**               37,286,305              359              7,465,371               72
Georgia                 60,007,287              396              6,167,758               41
Hawaii*                   No data            No data              No data            No data
Idaho                   43,988,668              212              5,171,309               25
Illinois               255,337,010             1,750            15,042,862              103
Indiana                212,421,457             2,268             6,741,915               72
Iowa                   290,402,045             1,993            15,557,962              107
Kansas                  97,609,809              458             14,288,218               67
Kentucky               303,697,461             2,902             9,266,440               89
Louisiana              110,854,326              917             23,810,568              197
Maine                   24,604,001              293             24,604,890              293
Maryland                29,078,328             1,095            28,376,619             1,069
Massachusetts           17,548,352              837             17,548,352              837
Michigan               101,740,440              685              4,875,629               33
Minnesota              162,845,289              751             10,176,861               47
Mississippi             78,266,577              634             13,077,791              106
Missouri               357,137,660             1,978            25,150,073              139
Montana                 23,767,286               62              5,959,390               16
Nebraska                73,539,115              367              9,615,563               48
Nevada*              Insufficient data   Insufficient data   Insufficient data   Insufficient data
New Hampshire            9,524,953              396              9,524,953              396
New Jersey              34,782,251             1,782            34,782,248             1,782
New Mexico*          Insufficient data   Insufficient data   Insufficient data   Insufficient data
New York               116,094,716              927             69,847,537              558
North Carolina          59,193,929              465              6,493,286               51
North Dakota            44,279,322              245              3,267,344               18
Ohio                   231,830,610             2,171             8,787,561               82
Oklahoma                76,890,764              425              9,976,364               55
Oregon**                75,037,027              323              8,641,053               37
Pennsylvania           132,627,144             1,131           101,416,271              865
Rhode Island             3,878,782             1,365             3,878,782             1,365
South Carolina          28,172,640              355              3,049,486               38
South Dakota            34,007,074              170              5,246,392               26
Tennessee               86,029,845              788             16,241,416              149
Texas**                202,028,122              363             25,268,765               45
Utah*                Insufficient data   Insufficient data   Insufficient data   Insufficient data
Vermont                 11,209,115              450             11,209,115              450
Virginia                61,989,190              596             42,615,368              410
Washington              70,493,340              407              8,358,395               48
West Virginia           32,138,556              512              7,201,034              115
Wisconsin              109,243,537              754              6,680,700               46
Wyoming**                7,969,137               41              2,468,541               13


Note - These data reflect the excess amounts ('loads') of N and P generated beyond the
assimilative capacity of each states' watersheds. Total N or P load is the sum of the area
weighted++ incremental N or P loads from all catchments (drainage basins) within a state. Also
shown is the average yield for each state, which is the total N or P load within a state divided by
the area of the state covered by one or more regional SPARROW models.
* Denotes states for which 2002 SPARROW model data were unavailable for most or all of the
state area.
** % of state area covered by respective 2002 SPARROW model(s): Colorado - 56%; Florida -
75%; Oregon - 93%; Texas - 82%; Wyoming - 78%. All other states are covered within the range
of 97-100% of state area.
++
  Where only a portion of a catchment was within state boundaries, the contribution from that
catchment was calculated as the overall load from the catchment scaled by the portion of the
catchment within the state's boundaries.                                          Source: USGS
SPARROW Decision Support Tool (http://cida.usgs.gov/sparrow/)
          Estimated Nitrate Concentrations in Groundwater Used for Drinking

Table 2. Estimated State areas and percent of state areas with deep groundwater nitrate concentrations > 5
mg/L, which is half of EPA's maximum contaminant level for nitrate. Also shown is the estimated % of the
population in each State with self-supplied drinking water (98% of which is from groundwater wells).

                      Estimated area (mi2) of state   Estimated % of state area        Estimated % of
       State           with groundwater nitrate       with groundwater nitrate      population with self-
                        concentrations >5 mg/L         concentrations >5 mg/L      supplied drinking water
Alabama                          3,435                           7%                          11%
Alaska                          No data                        No data                       35%
Arizona                          1,823                           2%                           4%
Arkansas                         6,727                          13%                           7%
California                      11,277                           7%                           7%
Colorado                         6,061                           6%                           6%
Connecticut                       277                            6%                          24%
Delaware                         1,067                          52%                          10%
Florida                          7,848                          14%                          10%
Georgia                          7,883                          13%                          18%
Hawaii                          No data                        No data                        6%
Idaho                            4,670                           6%                          30%
Illinois                         8,732                          16%                           9%
Indiana                          6,619                          18%                          26%
Iowa                            10,292                          18%                          18%
Kansas                          15,483                          19%                           5%
Kentucky                         2,276                           6%                          17%
Louisiana                         892                            2%                          12%
Maine                             138                            0%                          44%
Maryland                         4,051                          42%                          17%
Massachusetts                     408                            5%                           8%
Michigan                         7,156                          12%                          29%
Minnesota                        9,260                          11%                          22%
Mississippi                      3,476                           7%                          19%
Missouri                         1,710                           2%                          15%
Montana                           354                            0%                          32%
Nebraska                        27,510                          36%                          18%
Nevada                            741                            1%                           8%
New Hampshire                      85                            1%                          42%
New Jersey                       1,428                          19%                          11%
New Mexico                       1,612                           1%                          20%
New York                         3,110                           6%                          10%
North Carolina                   4,813                          10%                          26%
North Dakota                     1,614                           2%                          16%
Ohio                             2,946                           7%                          17%
Oklahoma                         6,122                           9%                           8%
Oregon                           3,688                           4%                          19%
Pennsylvania                     6,348                          14%                          20%
Rhode Island                       81                            8%                           8%
South Carolina                   1,116                           4%                          30%
South Dakota                     3,253                           4%                          14%
Tennessee                        2,924                           7%                           9%
Texas                           22,329                           8%                          10%
Utah                              729                            1%                           3%
Vermont                           239                            2%                          30%
Virginia                         2,055                           5%                          22%
Washington                       9,202                          14%                          14%
West Virginia                     263                            1%                          23%
Wisconsin                       10,975                          20%                          30%
Wyoming                          1,678                           2%                          17%
Note-Values are rounded to the nearest whole number (<0.5 % = 0%).
Sources: Nitrate concentrations are from USGS' Ground-Water Vulnerability Assessment (GWAVA), based on
data collected from 1991-2003. Drinking water source data is from USGS' Estimated Use of Water in the
United States in 2005.
               Commercial Fertilizer Purchased

Table 3. Average fertilizer purchased by states per year, and reported
in terms of nitrogen (N) and phosphorus (P2O5) content. Fertilizer
information is reported by state fertilizer control offices and excludes
livestock manure, liming materials, peat, potting soils, soil
amendments, soil additives, and soil conditioners.

                        Fertilizer purchased      Fertilizer purchased
       State
                          (tons of N/year)        (tons of P2O5/year)
Alabama                        107,562                   52,456
Alaska                          2,979                     789
Arizona                         90,874                   35,441
Arkansas                       285,193                   83,141
California                     776,235                  252,538
Colorado                       134,631                   43,205
Connecticut                     10,852                   3,472
Delaware                        18,966                   4,096
Florida                        215,679                   72,246
Georgia                        163,114                  107,849
Hawaii                          13,727                   4,626
Idaho                          208,875                   97,598
Illinois                       939,953                  322,797
Indiana                        529,805                  198,723
Iowa                          1,031,029                 337,566
Kansas                         744,065                  203,149
Kentucky                       204,768                   96,927
Louisiana                      198,281                   44,408
Maine                           30,166                   25,946
Maryland                        64,553                   20,322
Massachusetts                   16,490                   5,308
Michigan                       241,573                   81,369
Minnesota                      648,556                  265,168
Mississippi                    154,307                   35,285
Missouri                       458,254                  181,064
Montana                        148,965                   72,223
Nebraska                       805,174                  252,586
Nevada                          11,171                   6,965
New Hampshire                   4,495                    1,419
New Jersey                      30,040                   9,660
New Mexico                      38,968                   11,818
New York                        80,619                   34,550
North Carolina                 172,962                   99,706
North Dakota                   556,758                  213,452
Ohio                           414,309                  169,801
Oklahoma                       275,699                   70,367
Oregon                         168,668                   51,811
Pennsylvania                    95,513                   39,846
Rhode Island                    2,567                     884
South Carolina                  68,009                   25,710
South Dakota                   419,302                  191,797
Tennessee                      150,289                   77,218
Texas                          818,938                  213,147
Utah                            18,784                   13,796
Vermont                         7,473                    2,815
Virginia                        94,114                   49,812
Washington                     218,502                   51,905
West Virginia                   13,993                   3,477
Wisconsin                      248,609                   76,943
Wyoming                         99,646                   24,795

Note - P2O5 is 44% phosphorus. By convention, the amount (or analysis
grade) of phosphorus in fertilizers is expressed in this oxide form.
Additionally, The Association of American Plant Food Control officials
have developed a uniform state fertilizer bill which says that available
P2O5 must be guaranteed by the manufacturer and so the guaranteed
analysis of phosphorus must be expressed in the oxide form.
Source: Commercial Fertilizers annual data, 2000 - 2009, maintained
by the Association of American Plant Food Control Officials for The
Fertilizer Institute.
   Estimated Animal Agriculture Nitrogen and
           Phosphorus from Manure
Table 4. Estimated nitrogen (N) and phosphorus (P) produced
from animal manure in 2007.
                    Estimated animal      Estimated animal
      State
                   manure (tons of N) manure (tons of P)
Alabama                       147,660                45,677
Alaska                             877                   248
Arizona                        56,215                13,568
Arkansas                      197,338                61,734
California                    360,768                83,100
Colorado                      150,420                42,827
Connecticut                     3,850                    826
Delaware                       22,134                 6,552
Florida                       112,367                34,062
Georgia                       175,047                53,544
Hawaii                          8,771                 2,739
Idaho                         126,868                30,306
Illinois                      116,740                40,443
Indiana                       113,990                39,057
Iowa                          439,323               159,813
Kansas                        323,898                93,544
Kentucky                      158,866                47,855
Louisiana                      65,730                20,127
Maine                           6,734                 1,533
Maryland                       41,112                11,627
Massachusetts                   4,048                    902
Michigan                       82,897                21,576
Minnesota                     232,918                75,710
Mississippi                   123,499                38,103
Missouri                      288,196                92,643
Montana                       144,454                45,365
Nebraska                      346,805               106,062
Nevada                         25,124                 7,457
New Hampshire                   2,950                    640
New Jersey                      4,844                 1,228
New Mexico                     88,950                22,817
New York                       94,528                19,745
North Carolina                237,896                88,311
North Dakota                   97,078                30,119
Ohio                          119,076                35,842
Oklahoma                      312,890                96,410
Oregon                         82,427                23,410
Pennsylvania                  138,399                36,316
Rhode Island                       546                   132
South Carolina                 52,034                16,594
South Dakota                  208,803                65,050
Tennessee                     137,553                42,051
Texas                         770,983               227,472
Utah                           61,959                18,831
Vermont                        17,564                 3,359
Virginia                      113,354                34,056
Washington                     70,037                17,713
West Virginia                  30,401                 9,153
Wisconsin                     211,378                46,405
Wyoming                        76,194                23,225
Sources: The number of animals per state are from USDA’s
2007 Census. Estimated manure N and P contents are from
Ruddy et al. 2006.

				
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