The Frederick County Sanitation Authority operates a 4 mgd water treatment facility west of Stephens City. The FCSA began operation of a new facility in November 1993 and is currently processing 1.9 mgd. This new water treatment facility west of Stephens City has a design capacity of 4 mgd and reached 3.2 mgd in its operational qualification by February 1994. The source is ground water in quarries and is being treated to surface water treatment standards. The FCSA has 4 million gallons in storage.
Water rates vary by location and service.
Sewer The Opequon Water Reclamation Facility is operated by the Frederick-Winchester Service Authority. Average daily use is 5.9 mgd. The Authority provides wholesale service to Winchester City and the Frederick County Sanitation Authority. The Frederick County Sanitation Authority operates Parkins Mills facilities. The facility was expanded in January 1996 to 2.0 mgd.