EcoSpold 1 · Calculation comparison

BAFU 2025 v2, Heavy metals into water

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	BAFU 2025 v2
Source format	EcoSpold 1
Impact method collection	Ecological Scarcity 2021
Impact category	Heavy metals into water
Unit	UBP
Activities compared	11,549
Median ratio (VoLCA / published)	1.0038
Comparison band	1%
Activities outside the band	828
Share outside the band	7.17%
Verdict	Disagrees: misses the agreement a release is held to
Points drawn	2,086
Largest relative deviation	+409.73%
Activity with largest deviation	Disposal, polyurethane, 0.2% water, to construction waste landfill {CH}
Published reference	BAFU-2025 version2_LCIA Results.xlsx

Each point is one activity: what BAFU 2025 v2 published for Heavy metals into water (UBP), against what VoLCA computes from the same EcoSpold 1 source under the publisher's own Ecological Scarcity 2021 factors. The black line is equality and the grey band is 1%. 11,549 activities were compared; 828 fall outside the band, more than a picture can hold, so 1,925 of the 11,549 are drawn, evenly spaced over the published value whichever side of the band they fall, and the 161 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 1.0038, 7.17% 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.