DIY Recycled Bottle Hanging Planter

February 6, 2018

DIY Hanging planter

Most of the time the biosolids team tries to “DIY” (do it yourself) we end up with #pinterestfails. Perhaps we should stick to our day jobs – making sure Loop® gets to our customers so they can build good soil…

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Loop Landscapes Photo Contest

January 24, 2018

Loop landscapes photo contest

Check out the top winners of our 2018 Loop Landscapes photo contest! 1st place Overall    1st place “Mesmorizing Macro”    1st place “Soil and Seedlings and First Signs of Spring”    1st place “Flourishing Fauna”    1st place “Lush…

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Doing our part to fight climate change as a Utility of the Future

October 5, 2017

Maile in the forest

When confronted with big problems – problems that have no easy solution – we might feel overwhelmed. Climate change can make some of us feel that way. But every action helps, whether it is small or big. There are things you can do and there are things we as your utility can do.

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Where are those trucks going?

August 31, 2017


If you drive or live along Interstate-90, you’ve probably seen this truck on the road. You have probably wondered what it is carrying, and where it might be going.

Each one of these trucks carries about 31 tons of an endlessly renewable resource that returns valuable nutrients back to the soil. Loop® is a fertilizer-like product recycled from the waste that we send down drains and toilets.

While a small amount of Loop biosolids is turned into a garden product called GroCo compost, most Loop trucks are headed to farms and forests. Farmers and foresters have used Loop for decades to grow healthy crops and trees. Every day of the year, 10-15 trucks travel to approved sites across the region. As long as people in King County use those drains and toilets, we will find beneficial uses for recycled resources.

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CitySoil Farm hosts a special group of summer campers

August 14, 2017

Stakes at CitySoil Farm

Summer camp season is upon us, and what a different experience it is today! Camp has expanded beyond canoeing, s’mores, and campfire songs. King County campers dive into sports, performing arts, outdoor education, and a wealth of other activities.

King County hosted a special group of campers who are becoming immersed in a new life and a new country. A group of thirty-four children from World Relief Summer Camp visited CitySoil Farm, located at South Treatment Plant in Renton. There, they learned about wastewater treatment and sustainable urban agriculture, while helping other families in need.

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The poop Loop scoop: How King County recycles waste and water

August 4, 2017

Public Health Seattle & King County gives the scoop on Loop, an endlessly renewable resource that helps us in the fight against climate change. Dr. Rodgers, a local public health expert, explains how the advances of engineering technology harness nature’s cleaning powers and recover valuable resources: Loop® biosolids, biogas, and recycled water. Unlike synthetic fertilizer, or even manure, Loop is held to stringent environmental regulations. Engineering and technology allows us to test and monitor the entire process, which keeps our communities safe and healthy. 

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King County employees share the value of recycling

July 12, 2017

loop carbon cycle

People who work at King County Wastewater Treatment Division (WTD) are committed to a healthy future for our region. We invest in recycling as part of our work – just as people do at home. We turn waste into resources that help protect our environment and climate change.

Our employees bring vast personal and work experience to this commitment. Here are three people who developed their commitment to recycling resources from their experiences living and working outside the United States.

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CitySoil Farm grows healthy food and community

June 9, 2017

Produce at CitySoil Farm

CitySoil Farm is all about partnerships. King County, King Conservation District (KCD), Tilth Alliance, and DIRT Corps joined to create this unique 1.5 acre demonstration garden. Located at King County’s South Treatment Plant in Renton, CitySoil has transformed an unused area of the grounds into a teaching farm. CitySoil partners envision a future where education leads to sustainable food systems in urban areas.

Partnerships also help CitySoil deliver healthy food to people who need it. In 2016, CitySoil delivered 3,100 pounds of fresh produce to the White Center Food Bank. These deliveries included culturally specific foods requested by the food bank.

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CitySoil Farm Grows a New Generation of Gardeners

April 20, 2017

CitySoil Farmer

Fedora Williams carries on her family’s farming tradition in a whole new way.

As an immigrant to the United States in the late 1870’s, her great-great-grandfather began a living land trust with a small plot of land in Kansas. A fourth generation farmer, Williams remembers a childhood of school, chores, and more chores:  feeding animals, chopping wood, harvesting the garden for dinner. 

Today, Fedora Williams works for King Conservation District on a unique 1.5-acre farm site located at King County’s South Treatment Plant in Renton.

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Building a Resilient Foundation for Boulder Park Farms

September 10, 2016

Boulder Park Wheat

It’s just past Labor Day. The Harvest Moon will rise in a couple days. That means harvest time is over in Eastern Washington. Grain stalks that once glowed golden against blue skies have fallen. During harvest, giant combine harvesters crawl across fields, reaping, thrashing and winnowing as they travel. The grain that pours into a waiting truck means that our food cycle continues to turn.

Here at Boulder Park, farmers work in challenging conditions to build and conserve the foundation of their livelihoods, the soil.

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How Many T. Rex Dinosaurs Can a Loop® Truck Carry?

August 9, 2016

Loop truck backs

King County Wastewater Treatment Division takes public outreach seriously, but we like to have a little fun working with people- especially little people.   We meet people where they’re at to tell them how our projects and services support their communities and their values.

On July 30, the Loop Biosolids Program brought a Loop Truck to the City of Tukwila Safety and Emergency Preparedness Fair Touch-A-Truck held at Westfield Mall.

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A Garden Nourished with GroCo Beats a Cage in a Closet

July 28, 2016

Swallowtail on flowers grown with GroCo compost

I was one of those kids who are nuts about animals. You know who I’m talking about. The kid who finally got her own room in a city apartment and then spent dog-walking money on hamster cages.  I raised rodents in my closet until the smell gave away my expanding breeding operation.

Now I’m all grown up and I can host animals in my gardens instead of my closet.  I plant for our local wildlife and stand back to enjoy the show. 

This year, I picked up a free pickup load of GroCo compost at the World Water Day event at Brightwater Center.  It’s my first time using GroCo.

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GroCo Helps Your Garden Grow

July 27, 2016

Plums at CitySoil Farm

Even Mary, who we hear is quite contrary, knows how to make her garden grow – with the nutrient-rich power of GroCo compost made with Loop biosolids. 

But don’t take it from us; let a local gardener tell you how GroCo turned an average meal into a locally-sourced and sustainable farm-to-table dinner party.

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Recent Blog Posts

DIY Recycled Bottle Hanging Planter

February 6, 2018

Loop Landscapes Photo Contest

January 24, 2018