Water Quality Reports
Moulton Niguel Delivering Safe & Clean Water
Our highest priority is providing you and your family with safe and reliable water service at one of the lowest water rates in South Orange County.
Every year, Moulton Niguel conducts approximately 12,000 water quality tests that are independently analyzed at state-of-the-art laboratories. Our water is tested at each stage of the treatment and delivery process to ensure it’s safe when it reaches your home or business.
We are proud to report that, once again:
Moulton Niguel’s water is safe and continues to meet all state and federal water quality standards.
Copies of the report are available at the District’s office at 26161 Gordon Road in Laguna Hills. To request a copy, please call (949) 831-2500, or email customerservice@mnwd.com.
Lead and Copper Rule
The United States Environmental Protection Agency issued revisions to the Federal Lead and Copper rule in 2021 to better protect communities from the impacts of lead exposure. The Lead and Copper Rule Revisions (LCRR) required community water systems throughout the United States to inventory service lines and determine the material of all lines and fittings.
Moulton Niguel Water District completed an inventory of all District-owned and Customer-owned service lines and did not identify any lead components. A Notice of Lead Service Line Inventory Completion, which includes a description of inventory methods, may be found here.
Our Water Supply
Learn where Moulton Niguel customers get their water from
Have you ever wondered where your water comes from? Here in the Moulton Niguel Water District, our water is imported from both Northern California and the Colorado River.
Water from Northern California travels to us through a complex delivery system known as the California State Water Project. Designed and built in the 1960s, the State Water Project is one of the largest public water and power utilities in the world, providing drinking water for more than 27 million people statewide.
Managed by the California Department of Water Resources, the project stretches over 700 miles, from Lake Oroville in the north to Lake Perris in the south. Water stored in Lake Oroville, Folsom Lake, and other tributaries, and fed by snow melt from the Sierra Mountains, flows into the Sacramento and San Joaquin rivers, and from there into reservoirs in the Bay-Delta region.
From the Bay-Delta, giant pumps lift the water into the 444-mile-long California Aqueduct, there to flow southward to cities and farms in central and Southern California. Composed mainly of concrete-lined canals, the Aqueduct also includes over 20 miles of tunnels, and nearly 160 miles of pipelines. Along the way, the water is pumped 2,882 feet over the Tehachapi Mountains. The Edmonston Pumping Plant alone lifts millions of gallons a day up 1,926 feet, the highest single water lift in the world.
Managed by the Metropolitan Water District of Southern California, the Colorado River Aqueduct begins
near Parker Dam on the Colorado River. There, the Gene Pumping Station lifts the water over 300 feet, and it begins its 242 mile journey to Lake Mathews, just outside the City of Corona. Along the way, the water passes through two reservoirs, five pumping stations, 62 miles of canals, and 176 miles of pipelines.
All told, the water is lifted four times, a total of more than 1,300 feet. After its journey across the Mojave Desert, the water descends into the Coachella Valley and through the San Gorgonio Pass. Near Cabazon, the aqueduct flows underground, passing beneath the San Jacinto Mountains and continuing until it reaches its terminus at Lake Mathews. From there, 156 miles of distribution lines, along with eight more tunnels, delivers the water throughout Southern California.
Thirsty for More Information?
If you have any questions, please contact our Customer Service Department at (949) 831-2500 or customerservice@mnwd.com and ask to speak with our Water Distribution team.
Check out these great video resources on the State Water Project and the Colorado Aqueduct.
