UNH Water Systems Analysis Group
Nutrients in Your Watershed
Snow, Rain and River Sampling
Preliminary Data Summary
1999-2000 Sampling Season

Participating Schools:

Carrabassett Valley Academy; Carrabassett Valley, ME
Dirigo High School; Dixfield, ME
Edward Little High School; Auburn, ME
Gardiner High School; Gardiner, ME
Lewiston High School; Lewiston, ME
Messalonskee High School; Oakland,ME
Oxford Hills Middle School; South Paris, ME
Rain Samples
9 Samples
Average
Standard Deviation
Range
pH
5
1
4 - 6
N_N concentration (micromoles / L)
14.43
15.10
2.4 - 41.0
NH4 concentration (micromoles / L)
 9.64
 6.78
2.3 - 17.7
NO2 concentration (micromoles / L)
 0.08
 0.11
0 - 0.3
NO3 concentration (micromoles / L)
14.37
15.16
2.4 - 41.0
DIN concentration (micromoles / L)
24.10
19.20
6.2 - 58.0
PO4 concentration (micromoles / L)
 0.60
 0.93
0.02 - 2.6
SiO4 concentration (micromoles / L)
 1.15
 0.30
1.0 - 1.7

Snow Samples

22 Samples
Average
Standard Deviation
Range
N_N concentration (micromoles / L)
14.25
 9.51
5.3 - 36.9
NH4 concentration (micromoles / L)
  4.33
 4.11
0.02 - 15.9
NO2 concentration (micromoles / L)
 0.06
 0.04
0.01 - 0.2
NO3 concentration (micromoles / L)
14.19
9.56
5.3 - 36.9
DIN concentration (micromoles / L)
18.57
11.40
6.1 - 48.4
PO4 concentration (micromoles / L)
 0.32
 0.33
0 - 1.2
SiO4 concentration (micromoles / L)
 1.62
 0.77
1.0 - 3.7

River Samples

90 Samples
Average
Standard Deviation
Range
pH
6.4
1
5 - 7.7
Temperature (degrees C)
2.8
2.8
-4 - 13
N_N concentration (micromoles / L)
7.03
8.05
0.04 - 57.1
NH4 concentration (micromoles / L)
 1.63
1.77
0.04 - 7.1
NO2 concentration (micromoles / L)
 0.10
 0.12
0 - 0.56
NO3 concentration (micromoles / L)
6.95
8.03
0.01 - 57.0
DIN concentration (micromoles / L)
8.62
9.22
0.2 - 64.2
PO4 concentration (micromoles / L)
 0.26
 0.22
0.01 - 1.0
SiO4 concentration (micromoles / L)
51.69
 30.71
1.5 - 128.0