EcoSpold 2 · Calculation comparison

ecoinvent 3.9.1 cut-off, eutrophication: marine

A comparison of published impact results with VoLCA calculations from the same source data and the publisher’s impact factors. Points on the diagonal agree.

Engine version: volca 0.14.0 (bd7e64a, v0.14.0, linux)
Measured on: 2026-09-20

Comparison measurements and reference
Database	ecoinvent 3.9.1 cut-off
Source format	EcoSpold 2
Impact method collection	EF v3.1
Impact category	eutrophication: marine
Unit	kg N-Eq
Activities compared	19,867
Median ratio (VoLCA / published)	1.0053
Comparison band	1%
Activities outside the band	7,053
Share outside the band	35.5%
Verdict	Disagrees: misses the agreement a release is held to
Points drawn	2,169
Largest relative deviation	+866.27%
Activity with largest deviation	trout, production in semi-intensive system, in lake
Published reference	ecoinvent 3.9.1_cutoff_cumulative_lcia_xlsx.7z

Each point is one activity: what ecoinvent 3.9.1 cut-off published for eutrophication: marine (kg N-Eq), against what VoLCA computes from the same EcoSpold 2 source under the publisher's own EF v3.1 factors. The black line is equality and the grey band is 1%. 19,867 activities were compared; 7,053 fall outside the band, more than a picture can hold, so 1,987 of the 19,867 are drawn, evenly spaced over the published value whichever side of the band they fall, and the 182 of the 200 farthest from equality that this walk missed are added. Where several fall on one spot, at most three markers are drawn there, since a fourth would not darken it. Median ratio 1.0053, 35.50% outside the band. This misses the agreement a release is held to: at most 5% of activities outside the band and a median ratio inside it.