The WACC of Middlesex Water Co (MSEX) is 6.7%.
| Range | Selected | |
| Cost of equity | 6.30% - 9.20% | 7.75% |
| Tax rate | 8.90% - 10.80% | 9.85% |
| Cost of debt | 4.00% - 4.70% | 4.35% |
| WACC | 5.6% - 7.8% | 6.7% |
| Category | Low | High |
| Long-term bond rate | 3.9% | 4.4% |
| Equity market risk premium | 4.6% | 5.6% |
| Adjusted beta | 0.53 | 0.77 |
| Additional risk adjustments | 0.0% | 0.5% |
| Cost of equity | 6.30% | 9.20% |
| Tax rate | 8.90% | 10.80% |
| Debt/Equity ratio | 0.37 | 0.37 |
| Cost of debt | 4.00% | 4.70% |
| After-tax WACC | 5.6% | 7.8% |
| Selected WACC | 6.7% | |