|
Well Location
|
Nitrate mg/L (NO3-N)
|
|---|
|
Aquifer
|
N
|
Median
|
Mean
|
Std. Dev.
|
Minimum
|
Maximum
|
|---|
|
Piedmont and Blue Ridge crystaline-rock
|
1676
|
3.00
|
4.35
|
4.88
|
< .002
|
52.00
|
|
Piedmont and Blue Ridge carbonate rock
|
1093
|
6.03
|
7.88
|
7.43
|
0.020
|
95.50
|
|
Early mesozoic basin
|
469
|
3.77
|
4.96
|
5.28
|
< .002
|
45.00
|
|
Valley and ridge carbonate rock
|
241
|
11.00
|
13.60
|
13.39
|
< .002
|
90.00
|
|
Valley and ridge
|
134
|
1.02
|
2.12
|
2.86
|
0.010
|
16.64
|
|
Land use 1992
|
N
|
Median
|
Mean
|
Std. Dev.
|
Minimum
|
Maximum
|
|
Pasture
|
1756
|
5.00
|
6.89
|
7.37
|
< .002
|
90.00
|
|
Deciduous forest
|
674
|
2.15
|
3.60
|
4.46
|
0.003
|
45.00
|
|
Row crop
|
399
|
6.91
|
9.24
|
10.79
|
0.020
|
95.50
|
|
Low intensity residential
|
289
|
3.68
|
4.49
|
4.91
|
0.003
|
52.00
|
|
Mixed forest
|
173
|
2.50
|
3.81
|
3.84
|
< .002
|
20.80
|
|
Commercial or industrial
|
130
|
4.94
|
5.76
|
4.66
|
0.020
|
22.10
|
|
Evergreen forest
|
121
|
3.63
|
4.85
|
4.37
|
0.003
|
21.50
|
|
High intensity residential
|
21
|
5.95
|
5.09
|
2.47
|
0.690
|
9.23
|
|
Water
|
17
|
3.72
|
4.61
|
5.39
|
0.020
|
22.00
|
|
Quarry mine gravel pit
|
15
|
0.80
|
2.02
|
3.69
|
0.150
|
15.00
|
|
Transitional
|
11
|
1.78
|
2.34
|
1.81
|
0.190
|
6.13
|
|
Urban grasses
|
4
|
5.39
|
4.86
|
2.68
|
1.420
|
7.26
|
|
Woody wetland
|
3
|
2.48
|
6.22
|
8.45
|
0.280
|
15.90
|
|
Overall
|
3613
|
4.12
|
6.03
|
7.1
|
< .002
|
95.5
|
- Spatial classification is based on the National Land Cover Data Set; 1992, USGS [ref 38].
