Water regulations for farmers

Legislation exists to protect surface and groundwater, which affects how land and farm businesses are managed.

It also sets standards for the construction of farm facilities and the use of fertilisers, chemicals and manures. You therefore need to consider your water use and how to prevent water pollution.

Below we have rounded up information from Defra, the Environment Agency and other organisations.

The Nitrate Pollution Prevention Regulations (2015) set the safe limit for nitrates in surface and groundwaters as 50 mg/l. Surface and groundwaters in England and Wales are monitored and nitrate levels are recorded.

Approximately 70% of agricultural land in England is designated as a nitrate vulnerable zone (NVZ). Where nitrates are found to be consistently above the set limit and this is attributed to agriculture, an action programme is required to reduce these levels.

The action programme must be revised every four years, therefore the rules change frequently.

Rules farmers and landowners must follow if their land is in a nitrate vulnerable zone (NVZ).

If you run a farm in England that stores silage, slurry or agricultural fuel oil, you will need to follow the silage, slurry and agricultural fuel oil (SSAFO) regulations.

These regulations are intended to minimise the risks of pollution by setting out standards for the design and construction of storage facilities on farms in England and Wales. They apply to all slurry stores and reception pits.

In England, it is a legal requirement to pre-notify the Environment Agency 14 days before starting work on any new slurry store, silage clamp or fuel oil store.

There are additional requirements in Scotland.

These regulations are designed to reduce agricultural pollution in Wales. They apply to all farms in Wales and cover areas like nutrient management planning, sustainable fertiliser application and storage standards for silage and slurry.

They aim to protect water resources by setting rules for farming practices and replacing older regulations related to silage, slurry, and nitrate pollution.

You can read guidance for farmers and land managers on the Welsh government website or find out more on our web page.

Many farms have their own water supply as a cost-effective alternative to the mains supply. Taking water from a surface or underground source is called abstraction.

If you plan to take more than 20 cubic metres (20,000 litres) a day, you are likely to need an abstraction licence from the Environment Agency. The government has guidance on whether you need a licence, and how to apply. 

For more information, see the government's advice on managing water abstraction in England. Suggested sections are: 3.1 Addressing unsustainable abstraction; 3.3 Modernising regulation; 4.3 Abstraction licensing strategies (ALS).

Water byelaws control how water is stored and distributed on farms. They apply to all users of public water supplies. Livestock farms fall into the highest risk category for potential contamination.

The Water Regulations Approval Scheme (WRAS) has information on how to comply with water fittings regulations in the devolved nations on their guidance page.

These zones are catchment areas that have been identified when a protected area has been identified as ‘at risk’. Consult the maps of these zones when considering new buildings or outdoor production sites. View the Environment Agency map of the zones.

These have been established as part of the Water Framework Directive. There are also groundwater Source Protection Zones (see below).

Groundwater Source Protection Zones (SPZs) are zones which show the level of risk to a groundwater source from contamination. Sources include wells, boreholes and springs.

They are split into three risk categories: inner, outer, and whole catchment.  These are based on the time taken for water, and any pollutants within it, to reach drinking water abstraction points.

Find out more from the government website, including when you need to find out if you’re in an SPZ, a link to a map of SPZs, and technical guidance. There are also drinking water safeguard zones, see above.

Catchment Sensitive Farming (CSF) is a scheme run by Natural England in partnership with the Environment Agency and Defra.

CSF gives advice to farmers in England to improve the environmental performance of farms. Visit Catchment Sensitive Farming on GOV.UK for more information, including free advice and training to reduce diffuse water pollution from farming and to claim grants under the Capital Grant Scheme.

The Environment Agency have produced a list of tips to help pig producers protect water quality.

To report a pollution incident call the Environment Agency's 24hr hotline:
0800 80 70 60

There are regulations to protect groundwater. It is no longer permitted to dispose of tank washings containing pesticide residues to discard areas. Washings may only be applied to an untreated part of the crop.

Further information can be found on the Voluntary Initiative website.

If you have property or land adjacent to a river or other watercourse, you have several responsibilities: see owning a watercourse on GOV.UK.

If you plan to carry out work on land adjacent to a watercourse, plans must be submitted to the Environment Agency and the local authority before starting.

The Scottish Environment Protection Agency (SEPA) provides guidance and regulations for agriculture, including soil management, sheep dipping and pesticide use. 

Environmental regulations for farmers in Northern Ireland focus on preventing water and air pollution, managing waste and protecting designated environmental areas.

Key areas include nutrient management, particularly the storage and spreading of slurry and other manures, and the management of agricultural activities that could impact designated sites or semi-natural land.