Senior Debt Services Coverages measures the ability to pay debt service with operating revenue. This means that after paying off operating and maintenance costs, the utility has adequate funds to pay the existing debt service.

Clean Water Services has developed responsible financial practices that ensure adequate fiscal capacity to issue debt that is critical to fund large infrastructure projects.  CWS has earned the Standard & Poor's highest rating of AAA and Moody's Investors Service second highest rating of Aa1.