The WACC of Middlesex Water Co (MSEX) is 6.6%.
| Range | Selected | |
| Cost of equity | 6.40% - 8.70% | 7.55% |
| Tax rate | 8.90% - 10.80% | 9.85% |
| Cost of debt | 4.00% - 4.60% | 4.30% |
| WACC | 5.7% - 7.4% | 6.6% |
| Category | Low | High |
| Long-term bond rate | 3.9% | 4.4% |
| Equity market risk premium | 4.6% | 5.6% |
| Adjusted beta | 0.56 | 0.69 |
| Additional risk adjustments | 0.0% | 0.5% |
| Cost of equity | 6.40% | 8.70% |
| Tax rate | 8.90% | 10.80% |
| Debt/Equity ratio | 0.39 | 0.39 |
| Cost of debt | 4.00% | 4.60% |
| After-tax WACC | 5.7% | 7.4% |
| Selected WACC | 6.6% | |