The WACC of California Water Service Group (CWT) is 6.4%.
| Range | Selected | |
| Cost of equity | 6.40% - 8.80% | 7.60% |
| Tax rate | 26.20% - 27.00% | 26.60% |
| Cost of debt | 4.00% - 5.80% | 4.90% |
| WACC | 5.4% - 7.5% | 6.4% |
| Category | Low | High |
| Long-term bond rate | 3.9% | 4.4% |
| Equity market risk premium | 4.6% | 5.6% |
| Adjusted beta | 0.54 | 0.7 |
| Additional risk adjustments | 0.0% | 0.5% |
| Cost of equity | 6.40% | 8.80% |
| Tax rate | 26.20% | 27.00% |
| Debt/Equity ratio | 0.41 | 0.41 |
| Cost of debt | 4.00% | 5.80% |
| After-tax WACC | 5.4% | 7.5% |
| Selected WACC | 6.4% | |