Availability Charge Sample Calculation

Availability Charge Rates (effective January 1, 2019):

  • Water: $12.55 per gallon (max day usage)
  • Sewer: $30.45 per gallon (average day usage)

Consumption Usage Rates (effective January 1, 2017):

  • Water: $3.32 per thousand gallons (Tier 1)
                $5.72 per thousand gallons (Tier 2)

  • Sewer: $4.97 per thousand gallons
  • Reclaimed Water: $1.55 per thousand gallons

EXAMPLE:
Assumptions:

  • 100,000 SF data center
  • Domestic needs can be met with a separate 1” meter. Current flat rate for a 1" water meter =
    • Sewer - $25,120
    • Water - $20,704
    • Total cost = $45,824
  • Cooling tower use: maximum daily water usage = approx. 100,000 gallons
  • Max day to average day usage ratio is approximately 2:1
  • 25% of the cooling tower use goes to sewer = 12,500 average gallons sewer
 
Without Reclaimed Water:
One time availability charge
Water (Cooling Towers): 100,000 gallons x $12.55/gallon = $1,255,000
Sewer (Cooling Towers): 12,500 gallons x $30.45/gallon = $380,625
TOTAL: $1,635,625
With Reclaimed Water:
One time availability charge
Water (Cooling Towers): 100,000 gallons x $12.55/gallon x 10%= $125,500
Sewer (Cooling Towers): 12,500 gallons x $30.45/gallon = $380,625
TOTAL: $506,125
Annual Consumption Savings with Reclaimed Water for Cooling
50,000 gpd average x 365 days x ($3.32 - $1.55) / 1,000 gallons = $32,302.50