Recycled Water

Recycled Water Service

The Livermore Water Reclamation Plant produces recycled water for irrigation and fire protection uses. An average of 2 million gallons of recycled water is used every day in our recycled water service area.

Livermore Municipal Water staff maintain and inspect the City’s recycled water infrastructure and respond to emergencies 24/7. Livermore’s recycled water infrastructure includes two 1.88 million-gallon above ground reservoirs, 20 miles of recycled water mains, and 100 recycled water (purple) fire hydrants.

What is Recycled Water?

California Water Code defines recycled water as "water which, as a result of treatment of waste, is suitable for a direct beneficial use or a controlled use that would not otherwise occur." Water recycling allows water managers to match water quality to specific reuse applications.  This reduces the amount of water that is drinking quality being used for non-drinking purposes.

Wastewater at the Livermore Water Reclamation Plant goes through primary, secondary, and advanced tertiary treatment. During primary treatment, large solids are removed. During secondary treatment, bacteria are used to remove 95-98% of the remaining solids and organic material. Tertiary treatment uses filtration to remove any remaining solids and ultraviolet disinfection to destroy bacteria, viruses, and other pathogens. These processes duplicate nature's own purifying actions.

Generally, state, environmental management, and public health agencies regulate the production, conveyance, and use of recycled water.  The U.S. Environmental Protection Agency and local health agencies may also have a role in regulating recycled water use.

How does the Quality of Recycled Water compare to Drinking Water?

The final use of the water dictates how much additional treatment is required over and above the baseline treatment required for discharge into a waterway.  Recycled water that has the greatest potential for human contact must have the highest level of treatment and reliability.  Treatment requirements are less intense for non-potable uses where human contact is less likely to occur.

How is Recycled Water used in Livermore?

97% of Livermore’s recycled water is used for irrigation at commercial properties, the Las Positas Municipal Golf Course, and public parks and facilities. 3% of the recycled water is used for fire protection, construction uses, street sweeping, and toilet/urinal flushing.

Are Recycled Water Systems separate from Drinking Water Systems?

Yes, there are separate pipes for drinking and recycled water. Recycled water facilities are also clearly distinguishable to avoid mixing. Recycled water pipes and hydrants are purple and labeled with the words "Recycled Water - Do Not Drink."

Recycled Water Guidelines

All customers of the City of Livermore Water Reuse Program must comply with program requirements contained in the Guidelines for the Use of Recycled Water. Click on the link below to view the Guidelines

Recycled Water Guidelines