Bio-plastic foodware is not necessarily compostable or degradable, and some may contain toxic materials.
- Some bio-plastics may contain harmful chemicals such as PFOs and PFAs.
- When non-compostable bio-plastics enter compost processing facilities, they contaminate the waste stream.
- Bio-plastics do not always break down during the composting process.
- Bio-plastics look a lot like their plastic counterparts during the composting process.
- When bio-plastics end up in oceans and bays, they behave similar to regular plastics in the way they decompose, potentially harming marine life.
Nearly 90 percent of Marin’s organic material (food scraps and yard trimmings) is processed locally at the WM EarthCareTM Compost Facility located on the Redwood Landfill in unincorporated Novato. The facility produces compost approved for organic farming. This compost is then used by local farmers and ranchers in Marin County to keep their soil, crops, and animals healthy.
According to WM EarthCareTM Compost Facility, “compost that is suitable for use in organic food production in California must be registered as an Organic Input Material with the California Department of Food and Agriculture. This means only a very limited, if any, amount and type of synthetic (i.e. paper and cardboard) material can be included. CDFA investigators conduct routine sampling and inspections, respond to consumer complaints and make sure facilities comply with the laws and regulations.” As such, WM EarthCareTM Compost Facility does not accept many commonly labeled “compostable” materials such as bio-plastics.
Marin County waste hauler organizations explain how important it is to maintain the quality of the compost:
For the green bin for example, it is imperative that plastic lined paper and "compostable" plastics are not put into the green carts which are hauled to WM Earthcare in Novato. Having non-approved items in the material we send them can jeopardize our ability to continue hauling any compostable materials to this local facility. These standards ensure they can produce high quality compost certified for organic agriculture. This organic compost is used by local farmers who bring their food to our farmers markets, contributing to a circular economy.
Mill Valley Refuse Service, Marin Sanitary Service, and Recology
Read their full letter which supports adopting the ordinance.