Purveyors around the county
were asked what their average
gallon per day (gpd) usage was
for their systems.
Washington State
Department of Health – 350
gpd, WAC 246-290-221
WAC 173-539A Upper
Kittitas County Rule
reference 350 gpd
DOH Water System Design
Manual reference 200 gpd
Other banks statewide 150
to 350 gpd (as per Ecology’s
presentation)
Kittitas County Occupancy
Characteristics
1 person household
2 person household
3 person household
4 or more person household
19%
27%
16%
38%
Total Occupied Housing Units: 12,025
*Source: U.S. Census Bureau, 2008-2012 American Community Survey 5 year Estimates
320 gallons per day
used per household
(this number
includes domestic
use and outside
watering).
Cities included were:
 City of Cle Elum
 City of Kittitas
 City of Ellensburg
 City of South Cle Elum
192 gallons per day
per household (this
number includes
domestic use and
outside watering).
Districts included were:
 KCWD #2 (Ronald), KCWD #3
(Easton), KCWD #4 (Thorp),
KCWD #5 (Elk Meadows), KCWD
#7 (Sunlight Waters)
Mostly permanent residences
136 gallons per day
per household (this
number includes
domestic use and
outside watering).
Systems included were:
Sun Island Maintenance
Association, Driftwood Acres
Maintenance Association,
Evergreen Valley, Sun Country
Includes permanent and
seasonal residents
218 gallons per day per household.
Grasslands Water System includes only permanent residences
Upper Kittitas County
188 gpd
Lower Kittitas County
299 gpd
Comparison includes only residences
using water for domestic use and
outdoor watering.
 Kittitas County Water
District #1 (Snoqualmie
Pass)– mostly seasonal
connections.
35 gallons per day
 Evergreen Valley – an
upper county system mostly seasonal
connections.
42 gallons per day
Benton County – 274
gpd
Chelan County – 344
gpd
Klickitat County – 384
gpd
Okanogan County –
354 gpd
Includes indoor and
outdoor use
Water usage in 32 systems
in Eastern Washington
were averaged – 381
gpd/ERU (this number
includes both
indoor/outdoor use)