Cal Water accepts the following forms of payment: Cash, checks, money orders, credit card payments made over the phone. Electronic payments made through banks or online services like those offered by Yahoo! and Microsoft. Payments made through Automatic Payment Service. Customers also have the ability to manage their accounts 24 hours per day, seven days per week, online through electronic bill presentment, payment, and document management. The online bill pay feature supports payments from your bank account or by using a Visa or MasterCard credit or debit card, or Discover. Customers have the capability to setup their own recurring payment options and threshold payment limits.