Nitrate vulnerable zone

Printed Regulation of a Nitrate Vulnerable Zone

A nitrate vulnerable zone is a conservation designation of the Environment Agency for areas of land that drain into nitrate polluted waters, or waterways that could become polluted by nitrates due to environmental and health threats. A nitrate vulnerable zone can be designated as a response to an increase in nitrate leaching or increased use of nitrate fertilizers.

Nitrate pollution

Sources of nitrate pollution

One of the primary causes of nitrate pollution is the use of nitrogen fertilizers and application of manure to agricultural fields, which stimulates crop production but also contributes to nutrient pollution due to nitrate leaches from soil during heavy precipitation events.[1]

Environmental impacts

Nitrate runoff can lead to eutrophication of waterways, leading to excessive algal growth and oxygen depletion.

Health effects

High levels of nitrate in drinking water used to prepare infant formula can negatively affect infant health.[2] With continued use of contaminated water, infants can develop Blue Baby Syndrome, which can be fatal.

Regulations

Nitrate vulnerable zones are designated when the concentration of nitrate in a given area reaches or surpasses 50 NO3 mg/L. Regulations include:

  • Reducing the amount of fertilizer applied;
  • Prohibiting application of fertilizer during the winter when runoff is greatest and uptake by plants at a minimum;
  • Changing the times when animal waste is applied to the land and holding the waste in tanks until application.

The restrictions are within Good Agricultural Practice guidelines, meaning that farmers are expected to adhere to the given regulations without receiving any subsidies.[3] Farmers who do not adhere to these restrictions can be fined by the government.

Locations

Farm in Europe.

Nitrate vulnerable zones were introduced by the United Kingdom government in response to the European Union mandate that all countries in the EU must reduce the nitrate in drinking water to a maximum of 50 NO3 mg/L to protect public health and environmental health.[1]

United Kingdom

The United Kingdom identifies nitrate vulnerable zones as discrete zones in specific agricultural regions. There are at least 70 nitrate vulnerable zones in England and several in Wales, covering 600,000 hectares of surface water and ground water.[1]

Wales

The Welsh Government introduced an all Wales NVZ in 2021, previously, 2.4% of Wales' land was designated as a NVZ. Environmental and fishing groups welcomed the new rules. It will be rolled out, pending a review by the Senedd, over the next three years. The review came after major political backlash from opposition parties and farmers.[4]

Northern Europe

Belgium, Germany, the Netherlands, and Denmark have established their entire nations as nitrate vulnerable zones. These countries take a broader approach to designating nation-wide nitrate vulnerable zones because of the quality of the groundwater[5] as well as marine eutrophication.[1]

References

  1. ^ a b c d Osborn S, Cook HF (1997). "Nitrate Vulnerable Zones and Nitrate Sensitive Areas: A Policy and Technical Analysis of Groundwater Source Protection in England and Wales". Journal of Environmental Planning and Management. 40 (2): 217–234. doi:10.1080/09640569712191. ISSN 0964-0568.
  2. ^ Knobeloch L, Salna B, Hogan A, Postle J, Anderson H (2000). "Blue babies and nitrate-contaminated well water". Environmental Health Perspectives. 108 (7): 675–8. doi:10.1289/ehp.00108675. PMC 1638204. PMID 10903623.
  3. ^ "Encouraging low-input farming in the EU". European Commission - European Commission. Retrieved 2021-04-15.
  4. ^ "River pollution Wales: Farmers face 'six-figure sum' to comply". BBC News. 2021-06-09. Retrieved 2021-06-10.
  5. ^ Arauzo, M (2017). "Vulnerability of groundwater resources to nitrate pollution: A simple and effective procedure for delimiting Nitrate Vulnerable Zones". The Science of the Total Environment. 575: 799–812. Bibcode:2017ScTEn.575..799A. doi:10.1016/j.scitotenv.2016.09.139. hdl:10261/205492. PMID 27707576.


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