Summary of Significant Accounting Policies (Policies)

9 Months Ended

Sep. 30, 2011

Summary of Significant Accounting Policies

Revenue

Revenue

Revenue includes monthly cycle customer billings for regulated water and wastewater services at rates authorized by regulatory commissions and billings to certain non-regulated customers. Revenue from metered customers includes billings to customers based on monthly meter readings plus an estimate for water used between the customer’s last meter reading and the end of the accounting period. Flat rate customers are billed in advance at the beginning of the service period. The revenue is prorated so that the portion of revenue applicable to the current accounting period is included in that period’s revenue, with the balance recorded as unearned revenue on the balance sheet and recognized as revenue when earned in the subsequent accounting period With the adoption of the Water Revenue Adjustment Mechanism (WRAM) and the Modified Cost Balancing Account (MCBA), Cal Water records the difference between what is billed to its regulated customers and that which is authorized by the California Public Utilities Commission (CPUC).

Under the WRAM, Cal Water records the adopted level of volumetric revenues as authorized by the CPUC for metered accounts (adopted volumetric revenues). In addition to volumetric-based revenues, the revenue requirements approved by the CPUC include service charges, flat rate charges, and other items that are not subject to the WRAM. The adopted volumetric revenue considers the seasonality of consumption of water based upon historical averages. The variance between adopted volumetric revenues and actual billed volumetric revenues for metered accounts is recorded as a component of revenue with an offsetting entry to a current or long-term asset or liability balancing account (tracked individually for each Cal Water district). The variance amount may be positive or negative and represents amounts that will be billed or refunded to customers in the future.

Under the MCBA, Cal Water tracks adopted expense levels for water production costs (purchased water, purchased power, and pump taxes), as established by the CPUC. Variances (which include the effects of changes in both rate and volume) between adopted and actual purchased water, purchased power, and pump tax expenses are recorded as a component of revenue, as the amount of such variances will be recovered from or refunded to Cal Water’s customers at a later date. This is reflected with an offsetting entry to a current or long-term asset or liability regulatory balancing account (tracked individually for each Cal Water district).

The balances in the WRAM and MCBA assets and liabilities accounts fluctuate on a monthly basis depending upon the variance between adopted and actual results. The recovery or refund of the WRAM is netted against the MCBA over- or under-recovery for the corresponding district and is interest bearing at the current ninety day commercial paper rate when the net amount for any district achieves a pre-determined level at the end of any calendar year (i.e., at least 2.5 percent over- or under-recovery of the approved revenue requirement). Account balances less than those levels may be refunded or collected in Cal Water’s general rate case proceedings or aggregated with future calendar year balances for comparison with the recovery level.  As of September 30, 2011 included in the net regulatory balancing accounts, current and long-term assets were $11.1 million and $41.1 million, respectively, and current and long-term liabilities were $1.5 million and $0.6 million, respectively. As of December 31, 2010, included in the net regulatory balancing accounts, current and long-term assets were $14.8 million and $16.8 million, respectively, and the net regulatory balancing accounts current and long-term liabilities were $3.0 million and $0.6 million, respectively.