Nutrients Review 2023
On 1 April 2021, the Water Resources (Control of Agricultural Pollution) (Wales) Regulations 2021 came into force. These regulations revoked and replaced the Nitrate Pollution Prevention (Wales) Regulations 2013. Their objective is to reduce the loss of pollutants from agriculture to the environment by establishing rules for certain farming practices.
Following the implementation of the new Regulations, and at the request of the Welsh Government (WG), Natural Resources Wales (NRW) appointed consultants, Arup, to undertake a review of nutrients in water bodies across Wales. The aim was to develop a national-scale understanding of baseline nutrient water quality and assess potential nutrient risks. The review covers both nitrate and phosphate, which are considered the key nutrients contributing to poor water quality.
The review assessed the following water body types across Wales:
Groundwater
Surface waters (rivers)
Lakes
Transitional and Coastal (TraC) waters
The methodology used in the review broadly followed that applied during the 2017 NVZ review (NRW_DS116240), but was adapted to incorporate the assessment of phosphate. The methodologies provide a consistent and practical approach to identifying potentially polluted waters across Wales.
- Dull adnabod
- Rhychwant
- Dosbarthiad
- Ansawdd
- Allweddeiriau
- System Cyfeirio Gofodol
- Cynnwys
- Cyfyngiadau
- Cynnal a chadw
- Metadata
Dull adnabod
- Dynodydd
- NRW_DS125601
- Laith Metadata
- English
- Datganiad
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The methods used in this review largely follow the 2016 NVZ methodology. This approach was adopted to enable comparison of the results with previous assessments of waters polluted by nutrients from agricultural sources. However, there are several key differences, including:
Phosphorus has been included alongside nitrogen. This provides a more comprehensive understanding of the potential impacts of nutrients on water quality, as both nutrients play important roles in the nutrient cycle and should be considered when identifying measures to reduce nutrient inputs to water bodies.
Modelling has combined both agricultural and urban land use, whereas previous reviews assessed these separately. Land use types and individual nutrient inputs can still be viewed separately within the spatial layers of the dashboard.
A greater range of land use types has been included. Previous reviews used a maximum of five land use categories, whereas this review incorporates 17.
The same apportionment methodology has been applied across all water body types, whereas different methods were used in previous reviews.
Due to anomalous nutrient results affecting some water quality monitoring data, orthophosphate and total oxidised nitrogen (TON) data from 2014 to 2016 have been excluded from this review.
- Dyddiad cyfeirnod y set ddata (Cyhoeddiad)
- 2024-06-01
Ystod amser
- Dyddiad cychwyn
- 2023-01-01 After
- Dyddiad gorffen
- 2023-12-31 Before
- Categori pwnc
-
- Environment
Rhychwant
Rhychwant
- Hyd
- Wales (WLS)
))
Dosbarthiad
- Fformat - Math a Disgrifiad
-
-
Geographic Information System
(
)
- Math
-
ESRI Feature Class
-
Geographic Information System
(
)
Ansawdd
Ansawdd Data
- Cwmpas Ansawdd
- Dataset
- Cydymffurfiad
- Commission Regulation (EU) No 1089/2010 of 23 November 2010 implementing Directive 2007/2/EC of the European Parliament and of the Council as regards interoperability of spatial data sets and services
- Eglurhad
-
This dataset has not been assessed for conformance to the referenced INSPIRE regulation.
- Gradd
- false
- Datganiad
-
The methods used in this review largely follow the 2016 NVZ methodology. This approach was adopted to enable comparison of the results with previous assessments of waters polluted by nutrients from agricultural sources. However, there are several key differences, including:
Phosphorus has been included alongside nitrogen. This provides a more comprehensive understanding of the potential impacts of nutrients on water quality, as both nutrients play important roles in the nutrient cycle and should be considered when identifying measures to reduce nutrient inputs to water bodies.
Modelling has combined both agricultural and urban land use, whereas previous reviews assessed these separately. Land use types and individual nutrient inputs can still be viewed separately within the spatial layers of the dashboard.
A greater range of land use types has been included. Previous reviews used a maximum of five land use categories, whereas this review incorporates 17.
The same apportionment methodology has been applied across all water body types, whereas different methods were used in previous reviews.
Due to anomalous nutrient results affecting some water quality monitoring data, orthophosphate and total oxidised nitrogen (TON) data from 2014 to 2016 have been excluded from this review.
Allweddeiriau
Allweddair
- Math
- Theme
Dyfyniad
- Dyddiad (Cyhoeddiad)
- 2008-06-01
Allweddair
-
NRW Thesaurus
-
- nitrates (nitrogen)
- phosphates
- nutrients
- phosphorus
- nutrient pollution
- Nitrate directive
- Math
- Theme
Dyfyniad
- Dyddiad (Cyhoeddiad)
- 2026-08-27
System Cyfeirio Gofodol
Cynnwys
Gwybodaeth Cynnwys
Proffil CNC
Elfennau CNC
Cyfyngiadau
Cyfyngiadau
Cyfyngiadau ar Fynediad a Defnydd Cyhoeddus
- Math o Gyfyngiad
- Other restrictions
Cyfarwyddeb Cyfyngiadau Mynediad
- Cyfyngiadau
- no limitations
Testun cyfyngiadau mynediad
- Cyfyngiadau eraill
-
There are no access restrictions on this data. NRW may release, publish or disseminate it freely
Defnyddiwch gyfyngiadau
- Cyfyngiadau Defnyddio
- Other restrictions
- Cyfyngiadau eraill
-
© CNC/NRW Data may be re-used under the terms of the Open Government Licence providing it is done so, acknowledging both the source and NRW's copyright. It is the recipient's responsibility to ensure the data is fit for the intended purpose.
Datganiad Priodoli
- Cyfyngiadau eraill
-
Contains Natural Resources Wales information © Natural Resources Wales and Database Right. All rights Reserved
Math o Drwydded
- Cyfyngiadau eraill
- Open Government Licence
Metadata
Metadata
- Dynodydd Ffeil
- 4f4c4942-4343-5764-6473-313235363031 XML
- Laith Metadata
- English
- Math o adnodd
- Dataset
- Dyddiad Metadata
- 2026-10-02T09:08:27.929Z
- Enw Safonol Metadata
- NRW
- Fersiwn Metadata
-
1.0