To increase security, business customers are asked to register for UtiliGraph. To register, open UtiliGraph and select register.. Complete the form and send it in. A Tacoma Public Utilities representative will call you to confirm your request. You will be assigned a password within two business days. When you have your password, enter in the log-on space your account number from your Tacoma Public Utilities bill. Click on the Continue button to submit the number. The page for entering your password will be displayed.