King County Recycled Water: New Water, New Solutions Jacque Klug - - PowerPoint PPT Presentation

Jacque Klug Recycled Water Project Manager King County Department of Natural Resources & Parks Wastewater Treatment Division

King County Recycled Water: New Water, New Solutions

• 1. Current state of reclaimed/recycled water use
• 2. Washington State regulations and uses
• 3. King County water reuse
• 4. Innovative water resource projects using water reuse
• 5. Future of water reuse

Recycled Water is:

Also known as “Reclaimed Water” or “Reuse Water”

The many uses of recycled water…

Industrial process water Irrigation Environmental Enhancement Even for potable water

Direct and Indirect potable reuse projects (as of April 2017)

From 2017 Potable Reuse Compendium, EPA

Reclaimed Water in Washington

• Authorized in 1992 in Washington, codified in RCW 90.46.
• Regulated jointly by Department of Ecology and

Department of Health.

Water quality requirements align with end use

Water where public can contact requires Class A water. Environmental uses requires additional treatment. Reclaimed water rule creates approval pathway for direct reuse.

King County recycled water is safe!

King County has been safely recycling water for nearly 20 years. Recycled water treatment produces water with zero bacteria but keeps valuable nutrients plants need to thrive!

What about pharmaceuticals and personal care products?

Putting Risk Into Perspective

Example: A child could play

• n a lawn irrigated

with recycled water for 67,000 years before being exposed to the equivalent of one dosage of Ibuprofen.

Source: WateReuse Research Foundation

Recycled water supplies water to 29 communities in Washington

Why does King County make recycled water?

• Reduce reliance on Puget Sound for discharge
• Keeps more water in streams and aquifers
• Recycle nutrients and reduce fertilizer use
• Supports conservation and recycling values of our community

King County distributed 76.9 million gallons of recycled water in 2018

South Plant Recycled Water Distribution

• 1 million gallon per day production capacity
• 40.5 million gallons (MG) recycled in 2018
• 4.9 MG distributed to customers
• 35.6 MG used at South Treatment Plant
• 0.1% of effluent recycled and distributed to customers in

2018

Carnation Recycled Water enhances wetlands at Chinook Bend

31 million gallons of water produced at the Carnation treatment plant was used to enhance the wetland in 2018

Wetland in 2007 Wetland today

Brightwater Recycled Water Distribution

• 12 million gallon per day recycled water treatment capacity
• 40.7 million gallons distributed in 2018
• Approximately 1% of effluent produced in summer months

was recycled in 2018

Sammamish Valley Irrigators & Water Rights

Source: Department of Ecology

Sammamish Valley Recycled Water Project

• Keep water in the Sammamish River
• Enhances parks, golf courses and local agriculture
• Creates opportunities for water markets/trading water rights
• Drought-resistant water supply

INNOVATIVE RECYCLED WATER PROJECTS

City of Hermiston, OR

• Creates more water supply for

farmers

• City meets outfall temperature limits

City of Quincy, WA

• Economic development -water supply

for data centers, food processors

• Pursuing Aquifer Storage and Recovery

23

Bullitt Center Seattle, WA

• Decentralized non-potable reuse
• Greywater and rainwater captured and

reused onsite for non-potable uses

• Composting toilets treat and reuse human

waste

FUTURE DRIVERS FOR WATER REUSE IN THE PACIFIC NORTHWEST

Puget Sound Nutrient Source Reduction Project

Department of Ecology is investigating nitrogen limits for wastewater plants to improve water quality in Puget Sound.

2015 State of Knowledge: Climate Change in Puget Sound. Climate Impacts Group

Recycled water may help respond to changing watershed hydrology due to climate change.

www.kingcounty.gov/recycledwater Find out more: Jacque.Klug@kingcounty.gov Tel: 206-477-4474