DDW-2025-009896

Utah Department of Environmental Quality
Division of Drinking Water
Minimum Sizing Standards

Date Standard Effective: Mon Jun 27 11:11:37 MDT 2022
Peak Day Source Demand per ERC (gal/day): 2,957
Average Annual Demand per ERC (gal/day): 487,769
Equalization Storage per ERC (gal/day): 1,333
EPHRAIM CITY PWS ID: UTAH20011
Admin Name: JEFFERY MORRIS JENSEN
Address:
City, State, Zip: ,
Phone: [phone]
Email: [e-mail]
System Type: Community
Population: 6,135
MINIMUM SIZING STANDARD
MINIMUM SIZING STANDARD CALCULATIONS VARIABILITY
Data from these reporting years: 2019, 2020, 2021
Max Peak Day Source Demand per ERC (gal/day): 2,464
Max Average Annual Demand per ERC (gal/day): 406,474
Max Equalization Storage per ERC (gal/day): 1,111
x
x
x
(1 + 0.2)
(1 + 0.2)
(1 + 0.2)
=
=
=
2,956
487,768
1,333
DWRi WATER USE DATA REPORTED
Equalization per ERC (gal): 1,333
Existing Storage (gal): 5,280,000
ERCs: 1,844
Required Storage w/o Fire Flow: 2,048,684
Required Fire Storage (gal): 180,000
Required Storage w/Fire (gal): 2,228,684
Storage Deficiency: 0
Storage Deficiency (%): 0.0
No Storage Deficiency
Peak Day Source Demand per ERC (gpm): 2.05
Existing Source Capacity (gpm): 2,670
ERCs: 1,844
Required Resource Capacity (gpm): 3,780
Source Deficiency: 1,080
Source Deficiency (%): 28.57
Source Deficent
Year Peak
Day
Source
Demand
(gal/day)
Average
Annual
Demand
(gallons)
ERCs Peak
Demand
per ERC
(gal/day)
Avg
Annual
Demand
per ERC
(gal/day)
Equaliza
tion
Storage
per ERC
(gal/day)
OP
Days
2021 3,444,245 571,236,354.06 1,844 1,868 309,782 849 365
2020 4,392,471 724,741,501.65 1,783 2,464 406,474 1,111 366
2019 3,222,666 460,600,164.03 1,820 1,771 253,078 693 365
Variability:0.034 0.2 0.2 0.2
Year Peak Month Average
(gal/day)
Peak Month Average
per ERD (gal/day)
Ratio of PD/ERC to
Peak Month Avg/ERC
2021 3,471,182 1,882 0.99
2020 3,214,782 1,803 1.37
2019 2,958,096 1,625 1.09
CAPACITY CALCULATIONS FOR STORAGE
CAPACITY CALCULATIONS FOR SOURCES
SYSTEM STORAGE AND SOURCE INVENTORY
Storage ID Storage Name Effective Volume (GAL)
ST001 LAKE HILL TANK 1,000,000
ST002 30 K TANK 30,000
ST003 1 MILLION GALLON - 2 1,000,000
ST004 I MILLION GALLON -3 1,000,000
ST005 CANYON RD 750,000
ST006 1.5 MG EPHRAIM CANYON TANK 1,500,000
Storage Totals: 5,280,000 GAL
Source ID Source Name Flow Rate (GPM)
WS014 EPHRAIM WELL #1 1,800
WS001 SOUTH LITTLE SPRING 583
WS016 SOUTH WEST WELL 287
Source Totals: 2,670 GPM