Loudoun Water assesses availability charges on all service connections.  Payment of availability charges purchase capacity in Loudoun Water’s system.  
 
Availability charges are necessary to recoup the capital costs of delivering water and sewer service to customers.  These capital costs result from construction of facilities such as treatment plants, storage tanks, transmission mains, and pump stations.  The amount of the charge is based on the demand the customer places on the system, such that each customer pays for a proportionate share of the capital infrastructure provided by Loudoun Water.  
 
The capacities associated with water and wastewater availability charges are Maximum Daily Water (MDW) use and the Average Daily Sewer (ADS) use.  Both are measured in gallons per day (gpd).  For example, a single family residence would purchase 550 gpd MDW and 275 gpd ADS; this also know as one Equivalent Residential Connection (ERC).
 
In most cases, the availability charges are based upon the size of meter needed to convey the adequate flow and an associated ERC value (Table 1 – Availability Charges Based on Meter Size). However, for high demand customers, multi-family buildings, hotels, hospitals, and large connections, the charge may be based on an estimate of the customer’s demands.  

Table 1: Availability Charges Based on Meter Size

Meter ERC MDW (gpd) Water Availability ADS (gpd) Sewer Availability
3/4" (Residential)** 1 550 $6,766 275 $8,209
3/4" (Commercial) 1.5 825 $10,149 413 $12,314
1" 3 1,650 $20,298 825 $24,627
1-1/2" 6.5 3,575 $43,979 1,788 $53,359
2" Rotary 12 6,600 $81,192 3,300 $98,508

*Meters with capacity greater than a 2” Rotary shall be assessed availability charges based on estimated demand.
**1" UL Rated meter if fire line.

To provide guidance on estimating availability charges Loudoun Water has developed a list of appropriate meter sizes for a number of uses (Table 2 – Meter Size Based on Type of Use).  One may apply the availability charges in Table 1 to the corresponding meter size in Table 2.  If a use is not addressed within the guidance below, please contact Loudoun Water to discuss the specific application.  
 
For customers who anticipate their demands to vary from the guidance provided herein, Loudoun Water can consider estimates provided by the customer. However, availability charges will not be assessed at an amount less than the rates within Table 1.
 

Table 2:  Meter Size Based on Type of Use

Use Type Meter Size Description/Assumptions
Carwash Ancillary to a Gas Station 1.5" meter Automated drive through, 1 bay, with a reclamation system.
Cinema up to 3,500 Seats 2" meter Standard cinema with concession stand and no restaurant or meal service.
Fitness Center with Indoor Swimming Pool up to 30,000 SF  2" meter This includes the pool draining to sanitary sewer.  This does not include outdoor pool or irrigation. 
Office - Medical Office up to 50,000 SF 1.5" meter Does not include irrigation.
Office - Medical Office 50,000 to 100,000 SF 2" meter Does not include irrigation.
Office Space up to 100,000 SF 1.5" meter Does not include irrigation.
Office Space 100,000 to 150,000 SF 2" meter Does not include irrigation.
Swimming Pool (Approximate Surface Area 5,500 SF) 2" meter This does not include bath/club house demands.
Restaurant - Coffee Shop 3/4" meter Stand alone coffee shop with independent service connection.  
Restaurant - Dine In less than 10,000 SF 1.5" meter Does not include irrigation.
Restaurant – Dine in up to 20,000 SF 2" meter Does not include irrigation.
Restaurant - Fast Food 1.5" meter Fast food restaurant with approximate floor area 3,000 SF.
Retail up to 4 Store Fronts 1" meter Does not include restaurants, grocery stores, indoor swimming pools, pet stores with aquariums, or irrigation.
Retail more than 4 Store Fronts 1.5" meter Does not include restaurants, grocery stores, indoor swimming pools, pet stores with aquariums, or irrigation.
Retail - Large Retail 2" meter Applicable to big box stores and construction retail. Does not include garden center or irrigation.
Warehouse 1.5" meter Does not include irrigation, evaporative cooling, data centers, laundry, food preparation and packaging, beer brewing, or other high water demand uses.  

For customers whose needs exceed the capacities listed in Table 1, multi-family buildings, hotels, hospitals, and large connections, availability charges are assessed based on an estimate of the customer’s demands. To provide guidance on estimating demands Loudoun Water has developed a list water and sewer demands based on use (Table 3 – Estimated Demand Based on Use).  

 

Table 3:  Estimated Demand Based on Use

Use Type MDW ADS Description/Assumptions
Brewery 15 gallons/ gallon Beer 7 gallons/ gallon Beer Applicable to the average production rate. Does not include restaurant use. Rates adapted from Water Resources Engineering, by Larry W. Mays, 2011.
Carwash 15,000 gpd 5,000 gpd Stand alone, automated drive through, 1 bay, with a reclamation system, and includes domestic use.
Cinema with More than 3,500 Seats 3 gpd/ seat 1 gpd/ seat Standard cinema with concession stand and no restaurant or meal service.
Evaporative Cooled Data Center  1 gpd/ SF 0.125 gpd/ SF Applicable to traditional evaporative cooling system (cooling towers).  Assumes a 25% blow-down to sanitary sewer. Does not include domestic use.
Fitness Center with Indoor Swimming Pool Larger than 30,000 SF  350 gpd/ 1000 SF 200 gpd/ 1000 SF This includes the pool draining to sanitary sewer.  This does not include outdoor pool or irrigation. 
Hospital 600 gpd/ bed 300 gpd/ bed An inpatient facility, not including urgent care, nursing home, or assisted living.  ADS based on Va.DEQ estimated wastewater flow rate.
Hotel 130 gpd/ room 85 gpd/ room This includes hotels and motels with swimming pool, meeting hosting, and breakfast.  This does not include evaporative cooling or irrigation.

Laundromat

(Coin Laundry)

900 gpd/ machine 450 gpd/ machine Considers non-high efficiency washers of varied capacity (20lb.-70lb.) and includes domestic use.
Multi-family  360 gpd/ unit 180 gpd/ unit Any building that has more than a single residential unit using one service connection.  Does not include irrigation.

Multi-family – Age Restricted 

150 gpd/ unit 100 gpd/ unit 55+ condo type living.  Swimming pool, irrigation, and commercial kitchens are not included. 

Office - Medical Office Larger than 100,000 SF

90 gpd/ 1000 SF 45 gpd/ 1000 SF Does not include irrigation.
Office Space Larger than 150,000 SF 60 gpd/ 1000 SF 30 gpd/ 1000 SF Does not include irrigation.
Restaurant - Dine In Larger than 20,000 SF 500 gpd/ 1000 SF 200 gpd/ 1000 SF Does not include irrigation.
Schools 75 gpd/ 1,000 SF 25 gpd/ 1,000 SF Includes evaporative cooling, but not irrigation or concession stands.  If evaporative cooling is not included, reduce the MDW to 50 gpd/1,000 SF.
To estimate availability charges using Table 3, one may apply the unit values for MDW and/or ADS to the following rates: 
 
Availability Charges for Estimated Demand:
Availability Charge Water $12.30/gpd of MDW
Availability Charge Wastewater $29.85/gpd of ADS
 
Examples Using Table 3:
Hotel (100 Rooms):
Water Availability Charge = 100 Rooms x 130 gpd/Room x $12.30/gpd = $159,900
Sewer Availability Charge = 100 Rooms x 85 gpd/Room x $29.85/gpd = $253,725
 
Evaporative Cooled Data Center (100,000 SF):
Water Availability Charge = 100,000 SF x 1 gpd/SF x $12.30/gpd = $1,230,000
Sewer Availability Charge = 100,000 SF x 0.125 gpd/SF x $29.85/gpd = $373,125
 
Fitness Center (50,000 SF):
Water Availability Charge = 50,000 SF x 350 gpd / 1,000 SF x $12.30/gpd = $215,250
Sewer Availability Charge = 50,000 SF x 200 gpd / 1,000 SF x $29.85/gpd = $298,500