Appendix B. Means and standard deviations used in generation of pH data.
Mean
SD
SSWRP, 1997–2002
7.165
0.159
Rio Grande, 1989–1997
8.078
0.205
Rio Grande, 1998
8.06
0.303
Rio Grande, 1999
7.675
0.306
Rio Grande, 2000
7.908
0.138
Rio Grande, 2001
7.818
0.140
Rio Grande, 2002
7.791
0.094