Criteria for the selection of Priority Substances

Published by the Norwegian Environment Agency Lag rapport

Substances that fulfil one or more of the following four sets of criteria are included in the national target to achieve substantial reductions in emissions. The criteria and the values that are presented below are mainly based on international work in the EU and OSPAR, and laid down in REACH (see Annex XIII).

1 2 3 4
P+B+Th and/or Te vP+vB Additional criteria

 

Substances that are persistent, bioaccumulative
and have serious long-term effects on health or are highly toxic to the
environment.

 

Very persistent,  and very bioaccumulative
substances (documentation of toxicity is not required).

 

Substances that are detected in the food chain at levels which give rise to an equivalent reason for concern.

 

Other substances, such as substances that have endocrine disrupting effects and heavy metals,  that give rise to an equivalent level of concern.

 

 

For these sets of criteria the following definitions are used:

Criterion   Defined by
Persistent P

One of the following:

1) Fresh water: half-life > 40 days

2) Marine water: half-life > 60 days

3) Sediment, fresh water: half-life > 120 days

4) Sediment, marine: half-life > 180 days

5) Soil: half-life > 120 days

Other relevant information may be used if test results are lacking.1) 
Bioaccumulative B

Bioconcentration factor (BCF) > 2000

Other relevant information may be used if test results are lacking.1) 
Serious long-term effects on health T

One of the following:

1) Carcinogenic (Category 1A or 1B), i.e. classified as H350 or H350i

2)  Mutagenic (Category 1A or 1B), i.e. classified as H340

3)  Toxic to reproduction (Category 1A, 1B or 2), i.e. classified as H360 or H361 

4) Chronic toxicity (STOT RE category 1 or 2), i.e. classified as H372 or H373

Highly toxic for the environment T

One of the following:

1) Very high chronic toxicity for aquatic organisms: NOEC (aquatic, chronic) < 0,01 mg/l

2)  Substances that are sufficiently documented in internationally accepted tests as causing endocrine disrupting effects

Other relevant information may be used if test results are lacking.1) 
Very persistent vP

One of the following:

1) Fresh water and marine water: half-life > 60 days

2) Sediment, fresh water or marine: half-life > 180 days

3) Soil: half-life > 180 days

Other relevant information may be used if test results are lacking.1)
Very bioaccumulative vB

Bioconcentration factor (BCF) > 5000

Other relevant information may be used if test results are lacking.1)
Additional criteria  

One of the following:

1) Metals that may cause serious long-term effects. 

2) Substances that are traced in the food chain or for example in breast milk at levels that give rise to an equivalent level of concern.

3)  Substances that are sufficiently documented in internationally
accepted tests as causing endocrine disrupting effects.

1) Test results that show potential for persistency, toxicity and bioaccumulation may be used if tests of higher quality are lacking: a) potentially high persistency: does not fulfil the criteria for ready or inherent persistency (OECD 301, 302 or 306), b) potentially high chronic aquatic toxicity: L(E)C50 in acute test < 0,1 mg/l. This is most relevant with regard to persistency, as half-life test has recently been internationally accepted and little test data therefore exists today.