Facts and Figures


Formed: September, 1960
Purpose: To cost effectively and reliably finance, construct, operate and maintain a water, wastewater and recycled water system.
Service Area: Covers about 5,430 acres including all of the city of Laguna Woods (36%), and portions of the cities of Laguna Hills (21%), Mission Viejo (12%), Lake Forest (27%) and Aliso Viejo (4%)
Population Served: 48,821 (Estimated by the Center of Demographic Research at Cal State University Fullerton as of January 2019)


Budget: Annual budget, $22.7 Million
Staffing: 61 employees

Facilities – Potable Water:

Reservoir Storage Capacity:

Reservoirs 1 thru 5 – 12 million gallons combined

Reservoir 6  – 275 million gallons.  The capacity of this regional reservoir is shared by ETWD, SMWD and MNWD.
Distribution System: Over 170 miles of water lines and 8 booster stations with 12 water pressure zones.
Isolation Valves: 5,600
Fire Hydrants: 1,900
Cross Connection Devices: 1,801
Distribution Pressure Reducing Facilities: 23
Water Service Connections: 9,568
Water Quality Analysis: Operates a fully state certified laboratory
Emergency Connections with other Districts: Trabuco Canyon, Moulton Niguel, Laguna Beach County, Santa Margarita, and Irvine Ranch Water Districts
Transmission/Distribution Sample Points: 57
The District collects and analyzes 8,750 water quality samples per year

Facilities – Sanitation:

Wastewater Treatment Plant: Capacity of 6 mgd
Collection System: 158 miles of 4″ to 24″ sewer collection pipelines
Sewer Pumping Facilities: 11 (9 submersible and 2 dry well)
Effluent Pumping: 1 effluent pumping stations to convey treated secondary effluent to the ocean
Wastewater Quality Analysis: Operates a fully state certified laboratory
Manholes: 3,200
Effluent Storage: 14 mg
Pretreatment Program: The District performs its own Industrial Pretreatment Program.

Facilities – Recycled Water:

Tertiary Treatment Plant: Capacity of 3.7 mgd
Distribution System: 24.9 miles of 4″ to 20″ recycled water pipelines
Isolation Valves: 275
Water Service Connections: 275