The WACC of California Water Service Group (CWT) is 6.6%.
| Range | Selected | |
| Cost of equity | 6.70% - 9.10% | 7.90% |
| Tax rate | 26.20% - 27.00% | 26.60% |
| Cost of debt | 4.00% - 5.10% | 4.55% |
| WACC | 5.6% - 7.5% | 6.6% |
| Category | Low | High |
| Long-term bond rate | 3.9% | 4.4% |
| Equity market risk premium | 4.6% | 5.6% |
| Adjusted beta | 0.62 | 0.76 |
| Additional risk adjustments | 0.0% | 0.5% |
| Cost of equity | 6.70% | 9.10% |
| Tax rate | 26.20% | 27.00% |
| Debt/Equity ratio | 0.41 | 0.41 |
| Cost of debt | 4.00% | 5.10% |
| After-tax WACC | 5.6% | 7.5% |
| Selected WACC | 6.6% | |