The WACC of American Water Works Company Inc (AWK) is 6.6%.
| Range | Selected | |
| Cost of equity | 7.20% - 9.10% | 8.15% |
| Tax rate | 22.20% - 23.10% | 22.65% |
| Cost of debt | 4.00% - 4.80% | 4.40% |
| WACC | 5.8% - 7.3% | 6.6% |
| Category | Low | High |
| Long-term bond rate | 3.9% | 4.4% |
| Equity market risk premium | 4.6% | 5.6% |
| Adjusted beta | 0.73 | 0.76 |
| Additional risk adjustments | 0.0% | 0.5% |
| Cost of equity | 7.20% | 9.10% |
| Tax rate | 22.20% | 23.10% |
| Debt/Equity ratio | 0.51 | 0.51 |
| Cost of debt | 4.00% | 4.80% |
| After-tax WACC | 5.8% | 7.3% |
| Selected WACC | 6.6% | |