Community Science-informed Local Policy: a Case Study in Pinole Creek
Litter Assessment
Abstract
California is one of the only states actively managing trash in its
rivers. Several community groups in the Pinole, CA and a scientist
collaborated on a Thriving Earth Exchange community science project. Its
purpose was to assess the trash in Pinole Creek and identify policy
opportunities for the Pinole City Council. The key scientific questions
were: how much trash was in the creek, what types of trash were most
abundant, and where were areas of highest concern? The team enlisted
additional community volunteers at in-person local events and local
nonprofit listservs. We used a randomized sampling design and a
community science adapted version of The Trash Monitoring Playbook, to
survey the trash in the creek. We estimated there were 37 m 3 and 47,820
pieces of total trash in the creek channel with an average concentration
of 2 m 3 per km 2697 pieces per kilometer. This gave the community an
understanding of the scale of the problem and the resources needed to
address it. Plastic and single-use trash were most abundant, and the
community members expressed high concern about plastic single-use food
packaging and tobacco-related waste. The community used the data to
identify locations in the creek where trash was abundant and prioritize
follow-up study locations. Seven new policies were recommended to the
Pinole City Council. The City Council unanimously voted for the proposed
policies to be reviewed by the Municipal Code Ad-Hoc Committee. And that
is when community science turned to policy.