Background: With increasing pressure on companies
to minimize environmental impacts, this study devel-
ops an applicable approach to quantify environmental
impacts for industrial symbiosis (IS) networks, with
the purpose of supporting decision-making for symbi-
otic flows, in addition to assisting in the maturing of
the network.

Methods: A case study of Industrial Symbiosis North
is carried out to develop a life cycle assessment (LCA)
model based on the case context and a literature re-
view of preexisting literature.

Results: Results showed it possible to represent the
environmental impacts for three taxonomic levels (i)
Networks (ii) Entities (iii) Flows. The LCA results are
bound by limited data quality and a narrow system
boundary. Therefore, further improving adjustments
to the model were identified along with implementa-
tion steps.

Conclusion: Quantifying environmental impacts at
taxonomic levels proves beneficial for creating value
propositions for companies within the IS network. By
doing so, the facilitating organization expands its role
for the network in regards to supporting sustainable
development in a broader sense. Applying LCA in
IS networks is therefore seen as a vital step for ma-
turing both the facilitating organizations and the IS
networks.