Scoring scheme for Comparative Ranking of impact potential of chemical Alternatives (SCoRA)

Environmental Sciences Europe

Table 2 Scores for relative ranking of concerns about chemicals’ exposure (stock score) and effects (effect score)

Level of concern	Stock	Effect				Score
	Pollution stock levels in water/sediment* and soil [mol]	Toxicological threshold water, sediment * [mg/L]	Toxicological threshold soil [mg/kg dwt]	CMR properties	ED potential
–	–	–	–	no	no	0
Very low	< 5	≥ 100	≥ 1000	–	–	1
Low	5–< 50	1–< 100	100–< 1000	–	–	2
Moderate	50–< 500	0.01–< 1	1–< 100	–	low / moderate	3
High	500–< 5000	0.0001–< 0.01	0.01–< 1	H341, H351, H362	–	5
Very high	≥ 5000	< 0.0001	< 0.01	Annex XIII 3.2.3 (d) **	high / very high	10

*Pollution stock levels and toxicities in water and sediment may be considered together based on equilibrium partitioning (EqP) [58, 59].
**Criteria for classification as carcinogenic in Category 1A or 1B (H350 or H350i), germ cell mutagenic in Category 1A or 1B (H340), toxic for reproduction in Category 1A, 1B and/or 2 (H360, H360F, H360D, H360FD, H360Fd, H360fD, H361, H361f, H361d or H361fd), specific target organ toxic after repeated dose in Category 1 or 2 (H372 or H373), according to Regulation EC No 1272/2008.