S.C. Code Regs. 103-621.2. Amount of Deposit

A. For a new customer, a maximum deposit may be required up to an amount equal to an estimated two (2) months (60 days) total bill (including toll and taxes). For an existing customer, a maximum deposit may be required up to an amount equal to the total actual bills of the highest two (2) consecutive months within the preceding six (6) months.

B. All deposits may be subject to review based on the actual experience of the customer. The amount of the deposit may be adjusted upward or downward to reflect the actual billing experience and the payment habits of the customer.