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Water Rates FAQ

Click on a topic below to view the answers.

Why are periodic rate increases necessary?

The Prince William County Service Authority’s (Service Authority) goal is to set fair and equitable rates and fees while doing its part to provide clean safe drinking water to its customers and protect the environment. A key element of providing clean drinking water and protecting the environment is ensuring that the Service Authority’s infrastructure is maintained and in good working condition. This requires a significant capital investment every year.

The Service Authority periodically recommends changes to rates to ensure we invest in our system in order to properly maintain our infrastructure, meet environmental regulations and continue to deliver the quality and reliability our customers expect from us. The most recent factors impacting rates are:

  • Higher wholesale rates charged by Fairfax Water. Wholesale rates paid to Fairfax Water have risen 35% from $1.20 in 2017 to $1.62 in 2019, due to Fairfax Water’s higher operating and capital costs and lower retail and wholesale water sales. This increased the Service Authority’s purchased water costs by approximately $3.6 million in each of the past two years;
  • Slower growth in new Service Authority accounts. In fiscal year 2019, growth was 30% lower than projected. This resulted in lower availability fee revenues and will result in lower revenues than projected from user rates in the future;
  • Record rainfall High rainfall in fiscal year 2019 resulted in lower water and sewer revenue and an increase in utility expenses, primarily associated with higher wastewater treatment costs; and,
  • Declining consumption per account. As a result of more efficient appliances and changes in the way customers use water, usage per account has declined 16% over the past 10 years. This has reduced revenue from volume and peak use charges. The Service Authority expects this trend will continue for the next 10 years.


How does the Service Authority set rates?

The Service Authority sets its rates based on the actual cost of service as it does not make a profit. An independent financial consultant, Stantec Consultants, Inc., conducted a rate study for the Service Authority and recommended an adjustment to the rates. The Service Authority’s Board of Directors has approved new rates and fees effective January 1, 2020. The Service Authority’s rate setting philosophy is governed by the following principles:

  • Cost of service: The Service Authority’s rates must generate the revenue required to invest in and operate the system, perform needed repairs and replace its existing infrastructure. Customers pay the cost of providing service to their home or business.
  • Equity in rates: Rates provide equity among all customers, so that the rates for each customer class are fair and reflect the cost of serving that customer class.
  • Simple to understand: Rates should be easy to understand and calculate.
  • Stability: Rates should provide a stable revenue stream from year to year in order to ensure the reliable operation of the system.
  • Growth pays for growth: Revenue requirements for system operation and system expansion are developed separately. The cost of growth (treatment capacity, storage, etc.) is paid by new development while the cost of operations and capital replacements is paid by existing customers.
  • Minimize “rate shock”: Rates should be adjusted in modest amounts annually to ease the impact on customers.
  • Maintain the Service Authority’s credit ratings: Rates are set to maintain the Service Authority’s strong credit rating. Strong credit ratings represent the Service Authority’s ability to meet its obligations in good times and bad and lower the Service Authority’s cost to borrow funds for large capital projects.


Does the Service Authority receive tax dollars from Prince William County?

No, the Service Authority does not receive any tax dollars from the County.

Why do you set your rates for three years at a time?

Setting rates for three years at a time allows rate increases to be phased in over time and avoid large rate increases in a single year that would burden our customers.

Can we defer rate adjustments?

The deferral of necessary rate adjustments could require the Service Authority to either adopt larger increases in the future or postpone necessary infrastructure replacement projects.

What is the typical residential bill?

A typical residential customer uses 5,000 gallons of water monthly, which results in the following monthly water and sewer bills for the years 2020, 2021 and 2022.

To review the rates for 2020, 2021 and 2022, click here.

What are other local jurisdictions charging for water and sewer service?

In comparison with other local jurisdictions, the Service Authority’s rates remain competitive.

Why are some other jurisdictions able to charge lower rates for water and sewer service?

Each water and sewer utility sets its rates based on its own priorities, operating environment and capital needs. Some jurisdictions defer rate increases until it is absolutely necessary and some may delay the replacement of aging infrastructure.

The Service Authority is primarily a retail service provider and purchases most of its water from advanced water treatment plants owned by Fairfax Water. Higher wholesale water rates paid to Fairfax Water is one of the primary reasons for the proposed rate increase. The Service Authority also participates in the Upper Occoquan Service Authority, which is one of the most advanced and costly water reclamation facilities in the country. Both of these factors impact the Service Authority’s cost of service and its rates.

The Service Authority is careful to ensure its rates are competitive with surrounding jurisdictions while making the investments necessary to provide safe, reliable water service to our customers and returning clean water to the environment.

What is considered an affordable water and sewer bill?

The Environmental Protection Agency’s affordability guideline for water and sewer service is 4.0% of median household income. Based on typical consumption of 5,000 gallons per month for a single family residential customer, the Service Authority’s monthly water and sewer bills for 2020 through 2022 are less than 1.0% of median household income.

Where can I get additional information about rates and fees?

Additional details and answers to questions can be provided by the Service Authority at 4 County Complex Court, Woodbridge, VA 22192, Monday through Friday, 8:30 a.m. – 5 p.m., telephone (703) 335-7910 or email finance@pwcsa.org.

Customers can access additional information about the Services Authority’s rates, fees, policies and procedures by clicking here to access our Customer Handbook.