March 14, 2023
Item No. SS4
Grouvxdwater Replaxiskment System
Ff*vlal avisioK
Presevitatiovi
Rob Tkompsovt, OC Smitatiovi District
Kelly Rowe, OC Water District
Stepkevt Skeldovt, OC Water District
Mark Vukojevic, N13 Utilities Dept.
%O-WV1P1z4YN>1
Iiizz--f FORS
City Council MeetiKg
Study SessioK
March 1-4, 2.02.3
Utilities Department
CLEAN
GROUNDWATER
PUMPED
WASTEWATER GENERATED
SA
ORANGE COUNTY SANITATION DI
WATER PURIFIED
WASTEWATER
TREATED
Utilities Department
388 miles of sewers
479 square miles
-180 million gallons per day
2.6 million population
2 treatment plants
15 ❑ pump stations
20 cities
4 special districts
unincorporated parts of
County of Orange
OCSan
Business
■ ■
■
■
Residential
Industrial
Local
Manhole
Local Sev
Treatment _-
OC San Plants
Regional Trunkline
G W R S
GROUNDWATER REPLENISHMENT SYSTEM
To Orange County
Water District
OCSan
Sewer
Pipelines
Owned and ,
Maintained r. Y77
by OC San
OC6SAN
ORANGE COUNTY SANITATION DISTRICT
Up To
175 MGD
Provided
1!;
16 G W R S
16;6
GROUNDWATER REPLENISHMENT SYSTEM
134,000 ac-ft
Production
Goal
OCSan
9 OCSan
• Bolsa Chica
'•,State Beach
I J
0 Ocean
•, Outfa11
Q Q'•�. Pipe -
0 •� O 0
., .�,� • O
0 Crystal Cove
0 0 ••''••., State Park
OCWD
n
3 2e5*
million
people
served TV
Groundwater
Basin provides
85%
drinking
water
• supply
10 board
members
womanA
woman
cities and retail
water districts in
north & central OC
Protect rights to
Santa Ana River water
Paclf a
D
Orange County Groundwater Basin
HUNTINGTON
BEACH
OnINJECTION WELLS
5L0
fe et
Amber
Colored Water
Natural discoloration
004 —
from ancient buried
feet
plant and woody
material
1 1,5oa —
feet Newport -
Inglewood
Fault Zone
2,000 —
fee t
SANTA ANA
O
►s1.0P 1 ;;1 1 «I
I Shallow Aquifer -
1 Principal i
Aquifer f CROSS SECTION LOCATOR MAP
r..
A
II _ RECHARGE �\
low BAS N$
Dee' V
I B
-Aquifer Peralta ,
1 * Hills ANATA
l Fault RIVER
Consolidated,
2,500 — non -water -bearing
feet formations
Aquitards Aquifers
Low -permeability clay Lj Water -bearing
and silt deposits sand and gravel
El AREA MANAGE]
BY GCWD
G R0�
=�Nflwat��
. nevtEW,SxxY,,,,�F,.
'K an
Groundwater
Replenishment
System (GWRS)
u
Santa Ana River
Baseflows and
Stormflows
U•
Natural Rainfall
mported Water
ORANGE COUNTY WATER DISTRICT
Groundwater Replenishment System
■ Largest potable reuse project in the world
■ Online since January 2008 (70 MGD)
Expanded May 2015 (100 MGD)
■ Final Expansion complete in 2023 (130 MGD)
■ Purifies sewer water that would otherwise be
discharged to the ocean
■ Addresses seawater intrusion, combats
drought, and increases local water supplies
■ 400+ billion gallons produced since 2008
MGD = million gallons a day
GWRS Final Expansion
Final Expansion Construction:
■ Expanded treatment facilities at GWRS
■ New conveyance facilities at OC San Is Plant 2
■ Pipeline rehabilitation from Plant 2 and GWRS
0%
NORTHERN
CALIFORNIA
� �/-Irovt�
r
O%
OCEAN
DESALINATION
ONO
NEWPORT
BEACH
23%
COLORADO
RIVER
77%
RENEWABLE
GROUNDWATER
Utilities Department
0%
NORTHERN
CALIFORNIA
Utilities Department
r
0%
OCEAN
DESALINATION
OEM
......
NEWPORT
BEACH
15%
COLORADO
RIVER
85%
RENEWABLE
GROUNDWATER