| Attribute name | Label | Description |
|---|---|---|
| objectid_1 | ||
| sssi_name | ||
| sssi_id | ||
| sssi_code | ||
| sssi_nh3_c | ||
| shape_starea__ | ||
| shape_stlength__ | ||
| geom |
SSSI NH3 Critical Levels
Natural Resources Wales
This layer provides a Critical Level (CLe) for ammonia against which impacts on a SSSI should be assessed. The value is the lowest CLe for a feature on that site. The layer gives the SSSI name, SSSI code and ammonia Critical Level. The ammonia CLe can be: 1: a 1µg/m3 NH3 Critical Level indicates a SSSI has N-sensitive bryophytes/lichens as a feature or has bryophytes/lichens as key components of a habitat feature of that SSSI; 3: a 3µg/m3 NH3 Critical Level indicates a SSSI has N-sensitive vegetation, or has invertebrate features that are dependent on N-sensitive vegetation; NS: all features on a site are considered not to be particularly sensitive to ammonia; this does not mean that other aspects of a development will not have negative impacts on a SSSI, for example through water pollution or disturbance.
Attribution statement
Contains Natural Resources Wales information © Natural Resources Wales and Database Right. All rights Reserved. Contains Ordnance Survey Data. Ordnance Survey Licence number AC0000849444. Crown Copyright and Database Right.
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- Type:
- Spatial data
- Category:
- Environment
- Publication date:
- 03 August 2022
- Licence:
- Open Government Licence for Public Sector Information (OGL)
-
Copyright:
- Point of contact:
- opendata@naturalresourceswales.gov.uk
- Language
- English