| 1996 | 1997 | 1998 | 1999 | 2000 | 2001 | 2002 | 2005 | 2006 | 2009 | 2010 | 2013 | 2015 | |
| Min Cl | 46.00 | 8.00 | 320.00 | 148.00 | 68.30 | 8.44 | 309.00 | 28.00 | 50.00 | 3.16 | 228.00 | 4.56 | 217.00 |
| Average Cl | 293.19 | 356.22 | 320.00 | 865.48 | 449.72 | 470.20 | 1023.00 | 247.28 | 498.64 | 336.07 | 228.00 | 282.14 | 762.33 |
| Std. Dev. Cl | 301.13 | 825.67 | 203.00 | 926.43 | 535.12 | 996.77 | 858.22 | 209.83 | 679.83 | 429.81 | 305.00 | 348.41 | 907.56 |
| Max Cl | 853.30 | 6541.00 | 320.00 | 3920.00 | 1490.00 | 6840.00 | 2160.00 | 1110.00 | 2020.00 | 1490.00 | 228.00 | 1510.00 | 1810.00 |
| Min pH | 7.10 | 5.73 | 8.10 | 6.97 | 6.77 | 6.18 | 7.83 | 6.24 | 6.48 | 5.20 | 8.02 | 4.77 | 6.57 |
| Average pH | 7.78 | 7.38 | 8.10 | 7.44 | 7.20 | 7.23 | 7.87 | 7.33 | 7.21 | 7.30 | 8.02 | 7.32 | 7.24 |
| Std. Dev. pH | 0.36 | 0.50 | 0.70 | 0.46 | 0.26 | 0.51 | 0.06 | 0.54 | 0.46 | 0.75 | 0.01 | 0.76 | 0.59 |
| Max pH | 8.20 | 8.95 | 8.10 | 8.42 | 7.50 | 8.61 | 7.91 | 8.42 | 7.73 | 9.67 | 8.02 | 8.23 | 7.68 |