Coöperatie Mobilisation for the Environment UA and Vereniging Leefmilieu v College van gedeputeerde staten van Limburg and College van gedeputeerde staten van Gelderland (Joined Cases C-293/17 and C-294/17) EU:C:2018:882
Dutch nitrogen Habitats assessment is a major Court of Justice judgment on nitrogen deposition, programmatic assessment and the precautionary approach under Article 6 of the Habitats Directive.
The court held that a programme-level appropriate assessment can support later individual authorisations only where its findings are sufficiently complete, precise and definitive to remove reasonable scientific doubt. Future conservation or mitigation benefits cannot simply be assumed before there is sufficient certainty that they will actually deliver the required ecological result.
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- Neutral citation
- EU:C:2018:882; Joined Cases C-293/17 and C-294/17
- Court
- Court of Justice of the European Union, Second Chamber
- Judgment date
- 7th November 2018
- Judge
- A. Prechal, acting President of the Second Chamber, C. Toader (Rapporteur) and A. Rosas
- Case number
- C-293/17 and C-294/17
What the Dutch nitrogen case decided
The joined cases concerned the Netherlands’ Programme for Tackling Nitrogen, usually referred to as the PAS. The programme sought to assess nitrogen effects at a strategic level while allowing categories of agricultural activity to proceed under simplified authorisation or exemption arrangements.
The Court of Justice considered whether that system complied with Article 6(2) and Article 6(3) of the Habitats Directive.
The judgment did not rule that programmatic approaches are inherently unlawful. It set a demanding evidential standard for using a programme-level assessment to support later project decisions.
A programme-level assessment can be used, but only if it is robust enough
An appropriate assessment carried out for a wider programme may provide the scientific basis for individual authorisations.
But it must contain complete, precise and definitive findings and conclusions capable of removing all reasonable scientific doubt about the effects of the plans or projects covered.
If important effects remain dependent on uncertain future measures or assumptions, the programme cannot simply substitute for the project-level assessment required by the Habitats regime.
Future ecological benefits cannot be credited too early
The PAS relied in part on expected future improvements from conservation measures, source-control measures and autonomous developments.
The court drew an important distinction between measures whose benefits were sufficiently certain at the time of the assessment and future improvements which remained uncertain in nature, timing or effectiveness.
Benefits cannot be used to remove scientific doubt merely because they are hoped for, planned or expected. The assessment needs a sufficiently firm scientific basis for relying on them.
Recurring agricultural activity can amount to a project
The court also considered activities such as grazing livestock and spreading fertiliser.
Whether a recurring activity constitutes one continuing project or a series of projects depends on its nature, the circumstances in which it is carried out and the continuity between successive operations.
The fact that an activity recurs annually does not automatically take it outside the Habitats assessment regime.
The precautionary standard is demanding
The judgment sits within the established Habitats line of authority requiring the competent authority to be satisfied that a plan or project will not adversely affect site integrity where no reasonable scientific doubt remains.
That does not mean scientific knowledge must be perfect. It does mean that uncertainty cannot be bridged by optimistic assumptions about measures whose benefits have not been sufficiently established.
Why the case matters to UK planning
The judgment is important background to the approach used in Habitats Regulations assessment, particularly where a strategic nutrient or nitrogen scheme is intended to support large numbers of later permissions.
For current English practice, however, the starting point must be the domestic Habitats Regulations and current UK case law. The legal status and application of retained or assimilated EU case law should be considered in that domestic framework rather than treating this judgment as a stand-alone contemporary UK code.
Planning Geek’s guide to Habitats Regulations Assessment explains the current process, while our nutrient neutrality guide covers the planning implications of nutrient loading.
Read the full Dutch nitrogen judgment
The full Court of Justice judgment is held in the Planning Geek case law library. Gold Members can open the protected PDF below.
Dutch Nitrogen Habitats Assessment Case Law Page Updated: 10th September 2026