The WACC of Middlesex Water Co (MSEX) is 6.7%.
| Range | Selected | |
| Cost of equity | 6.60% - 8.80% | 7.70% |
| Tax rate | 8.90% - 10.80% | 9.85% |
| Cost of debt | 4.00% - 4.60% | 4.30% |
| WACC | 5.8% - 7.5% | 6.7% |
| Category | Low | High |
| Long-term bond rate | 3.9% | 4.4% |
| Equity market risk premium | 4.6% | 5.6% |
| Adjusted beta | 0.59 | 0.7 |
| Additional risk adjustments | 0.0% | 0.5% |
| Cost of equity | 6.60% | 8.80% |
| Tax rate | 8.90% | 10.80% |
| Debt/Equity ratio | 0.36 | 0.36 |
| Cost of debt | 4.00% | 4.60% |
| After-tax WACC | 5.8% | 7.5% |
| Selected WACC | 6.7% | |