Table 14. Hardness classification of ground-water-quality samples collected from wells
(Hardness classification from Hem, 1985. Results of sampling individual wells are listed in
appendix table 1.)
[CaCO3, calcium carbonate; mg/L, milligrams per liter]
|
Hardness as CaCO3 (mg/L) |
Hardness classes |
Percentage1 and number of samples collected from Wasatch aquifer within class |
Percentage1 and number of samples collected from coalbed aquifers within class |
|---|---|---|---|
|
0-60 |
Soft |
38 (3/8) |
0 |
|
61-120 |
Moderately hard |
25 (2/8) |
38 (5/13) |
|
121-180 |
Hard |
0 |
23 (3/13) |
|
more than 180 |
Very hard |
38 (3/8) |
38 (5/13) |
1Individual percentages for each hardness class, when summed, do not equal 100 percent due to rounding.
Table 15. Comparison of ground-water-quality samples collected from wells with selected State of Wyoming standards for agricultural (irrigation) and livestock use
(Standards from Wyoming Department of Environmental Quality, 1993. Results of sampling individual wells are listed in
appendix table 1.)
[All constituent or characteristic concentrations are in milligrams per liter except as indicated]
|
Constituent or characteristic |
Agricultural-use standard (irrigation) |
Percentage and number of samples collected from Wasatch aquifer that exceed standard |
Percentage and number of samples collected from coalbed aquifers that exceed standard |
Livestock-use standard |
Percentage and number of samples collected from Wasatch aquifer that exceed standard |
Percentage and number of samples collected from coalbed aquifers that exceed standard |
|---|---|---|---|---|---|---|
|
Chloride |
100 |
0 |
0 |
2,000 |
0 |
0 |
|
Sulfate |
200 |
75 (6/8) |
8 (1/13) |
3,000 |
0 |
0 |
|
Dissolved solids |
2.000 |
25 (2/8) |
8 (1/13) |
5,000 |
0 |
0 |
|
pH, standard units |
4.5-9.0 |
0 |
0 |
6.5-8.5 |
25 (2/8) |
0 |
