SoundGRO® Fertilizer

Why choose SoundGRO®?

SoundGRO® is the natural choice fertilizer product for your landscaped areas and vegetable gardens. SoundGRO® is a slow-release fertilizer that contains nutrients and micronutrients that are vital for the healthy growth of your plants.

SoundGRO® fertilizer is manufactured at the Chambers Creek Regional Wastewater Treatment Plant and is made from solids that are removed from the wastewater treatment process known as biosolids. SoundGRO® meets the U.S. Environmental Protection Agency's (EPA) highest standards for biosolid safety and is classified as Class A "Exceptional Quality" product. 

SoundGRO logo


SoundGRO® is a safe and effective fertilizer that can be used immediately or stored in a cool, dry place such as a garden shed or garage. It has many benefits over chemical fertilizers, including:

  • Slow-release formula works over a longer period of time, decreasing the need for frequent fertilizing
  • Low salt index can be applied even in the hottest, driest weather without risk of burning your plants
  • Improves soil structure
  • Contains trace nutrients

SoundGRO® is a not-for-profit program of Pierce County Planning and Public Works.

Purchase SoundGRO in Bulk

If you are interested in purchasing SoundGRO® in 1-ton totes and individually wrapped 50-lb bags, please use the link below:

Questions before you order? Email us at [email protected].

Need less than a ton? Visit one of our local distributors.


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Contact Us


(253) 798-3099 (information line only)
(253) 798-4050

Pick-up by appointment only

Chambers Creek Regional Wastewater Treatment Plant
10311 Chambers Creek Rd. W
University Place, WA 98467