Colorado Water April 2005

• Year: 2005
• Title: Colorado Water
• Author: Water Center of Colorado State University
• Description: April 2005
• Publications - Doc Type: Newsletter

the decreased surface water quality.
References
Bossong, C., Caine, J., Stannard, D., Flynn, J., Stevens, M., and
Heiny -Dash, J., 2003. Hydrologic Conditions and Assessment of
Water Resources in the Turkey Creek Watershed, Jefferson County,
Colorado, 1998 -2001. USGS Water - Resources Investigations Report
03 -4034. 140 p.
Dano, K., Poeter, E., and Thyne, G., 2004. Investigation of the Fate
of Individual Sewage Disposal system Effluent in Turkey Creek
Basin, Colorado. Completion Report No. 200. Colorado Water
Resources Research Institute.
Hofstra, W., and Hall, D., 1975. Geologic control of supply and
quality of water in the mountainous part of Jefferson County, Colo-
rado. Colorado Geological Survey Bulletin 36, 51 p.
Morgan, K., 2000. Spatial Analysis and Modeling of Geochemical
Distribution to Assess Fracture Flow in Turkey Creek Basin, Jef-
ferson County, Colorado. Colorado School of Mines MS thesis. 194
p. 71.
Yacob, S., 2004. Using Multivariate Statistical Analyses to Char-
acterize the Effects of Population Growth on Water Quality in a
Mountain Watershed. Colorado School of Mines MS thesis. 108 p.
Table 2. Mean and median values for each chemical parameter in the four kinds of water samples collected. A =
concentration mean, B = concentration median, N is number of samples. No median value is calculated for the ISDS
effluent samples because only two samples were collected. When the reported value for a parameter was "below
detection limit" a value midway between the detection limit and zero was used to calculate the mean and median.
15
Surface Waters
Ground Waters
Piezometer Samples
ISDS Effluent
Parameter
units
A
B
N
A
B
N
A
B
N
A
N
Aluminum
µg/L
104
2.34
34
0.56
0.44
7
69.4
13.5
33
0.47
2
Arsenic
µg/l,
0.95
0.69
34
0.76
0.69
7
0.99
1.5
33
1.44
2
Bicarbonate
mg/L
70.6
71
34
122
114
7
104
91.7
31
386
2
Bromide
mg/L
0.13
0.09
34
0.06
0.06
7
0.11
0.07
33
0.44
2
Cadmium
mg/L
0.04
0.03
30
0.05
0.06
7
0.24
0.24
2
0.04
2
Calci
mg/L
38.4
39.8
34
13.3
0.06
7
85.4
49
33
79.8
2
Chloride
mg/L
95.7
82
34
33
20.5
7
284
126
33
1100
2
Chromium
µg/L
7.23
7.71
34
13.7
13.8
7
5.52
3.89
33
43.5
2
Copper
pg/L
1.68
1.5
34
101
72.1
7
7.09
5.7
33
2.14
2
Fluoride
mg/L
0.55
0.48
34
0.41
0.37
7
0.23
0.2
33
0.25
2
Iron
mg/L
0.01
0.01
34
0.01
0.01
7
0.28
0.02
33
1.66
2
Lead
µg/L
0.09
0.05
34
0.75
0.27
7
0.15
0.06
33
0.37
2
Magnesium
mg/L
10.6
10.3
34
1.96
0.01
7
20.4
11.9
33
13.5
2
Manganese
µg/L
19.7
0.76
34
0.45
0.22
7
523
214
33
786
2
Nickel
µg/L
6.92
6
34
3.4
0.6
7
20.7
11.7
33
17.8
2
Nitrate
mg/L
2.05
0.41
34
23.2
31.8
7
20.5
17.3
33
0.39
2
Nitrite
mg/L
0.01
0.01
26
0.01
0.01
6
0.01
0.01
31
N/A
1
Phosphate
mg/L
0.07
0.06
34
0.09
0.06
7
0.13
0.08
33
6.74
2
Potassium
mg/L
3.39
2.62
34
80.3
131
7
32.1
12.8
33
1100
2
Selenium
µg/L
2.8
2.26
30
2.33
2.26
7
5.62
5.62
2
3.94
2
Silica (as SiO2)
mg/L
5.86
5.25
34
11
11.4
7
16.4
16.5
33
12.1
2
Silver
µg/L
0.48
0.53
30
0.46
0.53
7
0.58
0.58
2
0.47
2
Sodium
mg/L
31.5
30.6
34
27
1.58
7
80.8
61.3
33
41.2
2
Sulfate
mg/L
17.41
12.3
34
10.2
12.2
7
24.9
22.1
33
1.3
2
Zinc
mg/L
4.69
4.69
34
80.4
44.7
7
7.35
5.76
33
6.69
2
Specific Conductivity
[,g/L
288
205
23
353
1 308
7
807
675
30
2623
15
Table 2. Mean and median values for each chemical parameter in the four kinds of water samples collected. A =
concentration mean, B = concentration median, N is number of samples. No median value is calculated for the ISDS
effluent samples because only two samples were collected. When the reported value for a parameter was "below
detection limit" a value midway between the detection limit and zero was used to calculate the mean and median.
15