WASTE TREATMENT REGULATIONS 2020

As of January 1, 2020, new UK regulations mandate that rural properties without access to main drainage systems must install compliant sewage treatment systems. This initiative is crucial to prevent environmental pollution and ensure that wastewater is properly managed and treated before being discharged.

Upgrading Septic Tanks

Properties with existing septic tanks that discharge directly into surface water bodies, such as rivers or streams, are required to upgrade their systems. The upgrade options include:

Connecting to the Mains Sewer: Where feasible, properties should connect to the public sewer system.
Installing a Sewage Treatment Plant: A small, onsite sewage treatment plant can be installed to treat wastewater to a safe level before discharge.
Installing a Drainage Field: This involves creating a designated area where treated effluent can safely percolate into the ground.

Regulatory Compliance

To comply with these regulations, property owners must adhere to the Environment Agency's 'general binding rules.' Key requirements include:

Annual Maintenance: Regular maintenance and emptying of the system every 12 months.
Registered Waste Carriers: Using licensed waste carriers for maintenance and emptying services.
Discharge Limits: Treated sewage discharge must not exceed 2000 litres per day into a drainage field or 5000 litres per day into flowing water.

Building Regulations

Any new installation or significant modification to existing sewage systems requires approval under building regulations. In some cases, planning permission may also be necessary. When selling a property with a private sewage system, it is mandatory to upgrade the system before the sale and provide full details to the buyer.

Siting Requirements

The location and installation of sewage treatment plants must comply with specific guidelines to prevent environmental harm. These guidelines are outlined in:

Part H of the Building Regulations
General Binding Rules by the Environment Agency
British Water Codes of Practice – Flows & Loads 4

Does a Sewage Treatment Plant Need a Drainage Field?

The necessity of a drainage field depends on the specific site conditions and regulatory requirements. Generally:

Discharge to Surface Water: Advanced treatment plants may clean wastewater to a level suitable for direct discharge into surface water without needing a drainage field.
Discharge to Groundwater: If the treated effluent is to be discharged into the ground, a drainage field or soakaway is required to ensure proper filtration and prevent contamination.

The Environment Agency determines the appropriate discharge method based on factors such as effluent volume, environmental sensitivity, and proximity to water sources.

For comprehensive guidance and specific inquiries, consulting professionals, such as those at Harlequin, is advisable. For further assistance and detailed presentations on these regulations, please visit our contact page.