Get to Know Your Irrigation

Lawn IrrigationUse these tools to make a more informed decision when it comes to usage and irrigation.

To calculate your gallons used for irrigation you will need the following:

  • Nozzle size for the sprinkler heads in your system
  • Psi reading from your Annual Backflow Report (or psi from a hose bibb pressure gauge). Request your PSI here.
  • Number of zones in the irrigation system
  • Number of sprinkler heads per zone
  • Minutes each zone is set to run
  • Days per week the system is set to run
Irrigation Table

Scenario #1

Using 65psi, if the irrigation system has 4 sprinkler heads per zone, with 4 zones and water for 10 minutes per zone this would equate to a usage of 337.6 gallons (0.45 ccf) used for one complete day of watering.

  • Under the smallest size nozzle (3/32”), if the system was set to irrigate 3 times per week for 8 weeks (24 times over the billing cycle) you would use 10.83 ccf just for irrigation.

Scenario #2

Using Scenario #1’s 65psi and changing the nozzle size 11/64”, it would equate to 1,129.6 gallons (1.51 ccf) used for one complete day of watering.

  • Under the middle of the range size nozzle (11/64”), if the system was set to irrigate 3 times per week for 8 weeks (24 times over the billing cycle) you would use 36.24 ccf just for irrigation.

IRRIGATION BILLING BREAKDOWN FOR SCENARIO #1 & #2

Bi-Monthly Base Charge – Inside City

Meter Size
Effective 1/1/2019
SF Allowance (CCF)
Effective 1/1/2020
SF Allowance (CCF)
Effective 1/1/2021
SF Allowance (CCF)
Effective 1/1/2022
SF Allowance (CCF)
Effective 1/1/2023
SF Allowance (CCF)
3/4"
$39.574$40.763$41.982$43.241$44.54
0



Bi-Monthly Base Charge – Inside City
Customer Class Single-Family Residential

Effective 1/1/2019

Effective
1/1/2020

Effective
1/1/2021

Effective
1/1/2022

Effective
1/1/2023


Block 1: 0 – 12 CCF
$3.70
$3.27
$2.94
$2.68
$2.47
Block 2: 12 – 30 CCF
$5.95
$6.13
$6.31
$6.50
$6.70
Block 3: Over 30 CCF
$7.45
$7.68
$7.91
$8.14
$8.39


SCENARIO #1

  • Nozzle Size 3/32”
  • 4 Sprinkler Heads per Zone
  • 4 Zones running 10 minutes each
  • 65 psi
  • 3 Days per week for 8 weeks (bi-monthly cycle)
Total Water Used for irrigation Only
2021 ¾” Meter Base Charge
2020 Usage Fee – 7 units (0-12 Range)
Total Bi-Monthly Water Bill
10 units (Billing for 8 units w/ 2 units incl. in base fee)
$41.98
$23.52
$65.50


SCENARIO #2

  • Nozzle Size 11/64”
  • 4 Sprinkler Heads per Zone
  • 4 Zones running 10 minutes each
  • 65 psi
  • 3 Days per week for 8 weeks (bi-monthly cycle)
Total Water Used for irrigation
2021 ¾” Meter Base Charge
2021 Usage Fee – 10 units (0-12 Range)
2021 Usage Fee – 18 units (12-30 Range)
2021 Usage Fee – 6 units (30+ Range)
Total Bi-Monthly Water Bill
36 units (Billing for 34 units w/ 2 units incl. in base fee)
$41.98
$29.40
$113.58
$47.46
$232.42

*** Please note, this is only to calculate the amount of water used in irrigation. This amount is on top of the normal residential usage (sinks, toilets, shower/bath, dishwasher, washing machine etc.) which on average is 11 ccf bi-monthly. ***