| All Data in ppm | Median based | |||||||||
| Mg | Ca | N | Water hardness | |||||||
| Ave | Median | SD | Ave | Median | SD | Mg | Ca | ppm CaCO3 | ||
| all | 13.2 | 7.2 | 19.7 | 18.1 | 8.3 | 45.3 | 131 | 76 | 50 | |
| S'05 | 14.6 | 7.8 | 14.8 | 26.5 | 8.3 | 60.2 | 8 | 16 | 53 | |
| F'04 | 15.7 | 8.2 | 29.2 | 32.4 | 6.6 | 83.1 | 20 | 21 | 50 | |
| F'00 | 9.6 | 6.2 | 10.1 | 9.8 | 6.4 | 6.5 | 21 | 25 | 42 | |
| S'01 | 18.5 | 5.2 | 27.1 | 15.00 | 10.8 | 11.4 | 12 | 14 | 49 | |
| Davis | 50.2 | 71.9 | 41.5 | 18.9 | NA | 14.9 | 3 | 2 | NA | |
| Sac Region | 7.4 | 5.8 | 6.6 | 14.7 | 7.0 | 30.6 | 56 | 76 | 41 | |
| Surrounding Region | 29.4 | 19.2 | 38.8 | 30.1 | 11.7 | 77.0 | 21 | 23 | 108 | |
| Near CSUS/So. Side | 3.7 | 2.4 | 3.3 | 8.5 | 8.7 | 2.0 | 6 | 13 | 31 | |
| Near CSUS/No. Side | 11.9 | 9.9 | 5.3 | 29.4 | 6.7 | 69.7 | 12 | 14 | 58 | |
| South Sacramento | 7.3 | 5.8 | 7.7 | 7.9 | 5.6 | 6.3 | 17 | 10 | 38 | |
| NE region | 2.3 | 1.8 | 1.5 | 9.6 | 6.9 | 9.2 | 12 | 20 | 25 | |
| Rancho Cordova | 5.5 | 5.2 | 2.8 | 8.1 | 6.4 | 3.0 | 4 | 6 | 37 |