26Nov, 2025
    Understanding the General Binding Rules. A Simple Guide for Homeowners

    If your home relies on a septic tank or wastewater treatment plant, you are responsible for how your wastewater is managed. The General Binding Rules (GBRs) set the legal standards you must follow to stay compliant and protect local waterways. Many homeowners feel unsure about what the rules mean – this guide explains the essentials.

    1. Understand Your System

    The first step toward wastewater compliance is knowing what kind of system you have. A key point is the difference between a soakaway and a drainage field. Only drainage fields are suitable for treated wastewater. Soakaways are designed for rainwater and do not meet the requirements for effluent discharge. Issues often begin when a soakaway is mistakenly used for wastewater.

    2. Check How Your System Discharges

    The General Binding Rules require your system to discharge in one of two ways:
    • To a drainage field
    • To surface water through a compliant package treatment plant

    Older septic tanks that discharge to surface water no longer meet the rules. If yours still does, you will need to upgrade your system or redirect the discharge to a drainage field.

    3. Keep Up with Maintenance

    • Routine maintenance is essential for septic tank compliance. You must:
    • Arrange regular emptying
    • Follow service schedules from the manufacturer
    • Fix faults quickly
    • Keep clear maintenance records

    A well-maintained system reduces pollution risks and helps you avoid costly breakdowns.

    4. Know When an Upgrade Is Needed

    • You may need to upgrade your septic tank or treatment plant if:
    • It still discharges to a ditch or stream
    • The system uses a non-compliant soakaway
    • You notice smells, wet patches, or slower drainage
    • The tank struggles during heavy rain

    An engineer can assess your system and explain the best options for long-term wastewater compliance.

    5. Protect Your Home and the Environment

    The GBRs exist to prevent pollution of groundwater, rivers, and surrounding land. A failing or outdated septic tank can harm the environment and put your property at risk. Staying compliant keeps your home safe and reduces the chance of enforcement action.

    How Binder Supports Homeowners

    We work across East Anglia to help homeowners understand their responsibilities under the General Binding Rules. Our engineers provide clear assessments, servicing, repairs, and full system upgrades. We focus on simple advice and long-term solutions that keep your septic tank or drainage field operating safely.

    If you want a system check or need help understanding your options, we are here to guide you.

    31Oct, 2025
    Staying Compliant: General Binding Rules Explained

    If your property isn’t connected to the mains sewer, you’re legally responsible for how your wastewater is managed. The General Binding Rules (GBRs) set out by the Environment Agency are there to protect local rivers and groundwater from pollution and to make sure private systems like septic tanks and sewage treatment plants are running safely.

    What the General Binding Rules mean

    The General Binding Rules apply to small domestic sewage discharges across England. They set limits on how much can be discharged and what standards must be met to avoid pollution.

    In simple terms, your system must:

    • Handle domestic wastewater only (from toilets, sinks and washing facilities)
    • Not cause pollution to groundwater or local rivers
    • Be properly maintained and emptied by a registered waste carrier
    • Stay within the volume limits — up to 2,000 litres per day to the ground, or 5,000 litres per day to surface water

    It’s also important to know that since 2020, septic tanks that discharge directly into a watercourse (such as a stream or ditch) are no longer permitted. If yours still does, it must be upgraded or redirected to a drainage field or treatment plant.

    (Source: GOV.UK – General Binding Rules)

    Do the rules apply to you?

    Almost certainly, yes. If your property uses a private system and isn’t connected to the mains, the General Binding Rules apply.

    Systems installed, upgraded or moved after October 2023 must meet the latest design standards. Older systems should still meet the basic environmental requirements. If your system fails or causes pollution, the Environment Agency can require you to repair, replace or upgrade it.    If for example your system was installed in 2014, you would need to meet the General Binding Rules prior to 2015.

    It’s always worth checking now rather than later — especially if you’re planning to sell your property, as compliance is something buyers’ solicitors increasingly request evidence of.

    Why compliance matters

    Beyond avoiding enforcement action, compliance protects local ecosystems and community health. Even small leaks or poorly maintained tanks can allow wastewater to seep into soil and streams, leading to long-term damage.

    Our engineers regularly see issues that could have been prevented with routine maintenance — cracked lids, blocked outlets, or tanks that haven’t been desludged for years. Catching these early saves money, protects the environment, and keeps your property compliant.

    We’re also proud to work with Our Rivers — a partnership helping homeowners upgrade old systems that don’t meet today’s standards. Through this initiative, eligible properties in certain catchment areas can receive a free or heavily subsidised system upgrade, helping reduce pollution and safeguard local waterways for the future.

    How to stay compliant

    • Check your system type and location – Is it a septic tank or treatment plant? Where does it discharge?
    • Book regular maintenance – Tanks should be emptied and inspected at least once a year.
    • Keep clear records – Service logs and waste transfer notes prove your system is being managed correctly.
    • Upgrade if needed – Older systems discharging to watercourses will need replacing.
    • Ask for advice – If you’re unsure, our team can carry out a compliance check and explain your options clearly.

    How Binder can help

    We’ve been supporting homeowners and businesses with wastewater management for decades. Our trained engineers provide servicing, tank emptying, maintenance, and full system replacements, ensuring everything we install and maintain meets current regulations.

    If you’re not sure whether your septic tank or treatment plant complies with the General Binding Rules, our friendly team is happy to help. We’ll explain what’s needed in plain English with practical advice you can trust.

    Get in touch with us to arrange a compliance check or learn more about the Our Rivers upgrade scheme.

    22Aug, 2022
    Focus On: Septic Tank vs. Treatment Plant

    Septic tanks and sewage treatment plants (STP’s) are often confused as the same thing, however they are not.  

    How do they work?

    A STP works in a similar way to a septic tank by acting as a trap for the solid waste and discharging the waste water but with a big difference; STP units are designed to treat the wastewater before it is discharged, and is therefore permitted to discharge to a watercourse such as a river, stream or pond and in many instances can be discharged into a storm water soak-away.

    What are the differences?

    • STP’s require electricity to run the air pump and other mechanical components however septic tanks can run power-free
    • Septic tanks don’t require servicing (although they do require emptying), whereas sewage treatment plants require servicing and emptying.
    • A typical septic tank has two ‘zones’, whereas a sewage treatment plant typically has three.
    • A STP provides treatment of the waste, whereas a septic tank simply separates it – this means that the waste water that leaves a STP is cleaner than what leaves a septic tank. 

    Septic Tank

    Sewage Treatment Plant

    What does this mean to you? 

    There are a lot of properties out there which currently have a septic tank that discharges to a local watercourse (instead of to a soakaway system or drainage field). As of January 1st 2020, this is no longer legal. 

    If you own a property with this drainage system, you must upgrade it by that date. If you are selling a property with this system in place before 2020, you must upgrade it before selling. If you are buying a property with a septic tank discharging to a watercourse and this hasn’t yet been discussed – don’t until agreement has been made about upgrading the system. 


    For more information about the General Binding Rules read our blog here, or speak to our team.

    1Aug, 2022
    Do you meet the General Binding Rules?

    Industry standards released by the Environmental Agency in 2015, mean any sewage treatment plant that discharges wastewater must meet strict regulations. 

    If your treatment system was installed before 1983 you do not need to do anything, as there was no British Standard in place before then. You must, however, still meet the other general binding rules that apply to you.

    The new January 2020 General Binding regulations are thorough and rules depend on how much you discharge, where you discharge and if you are a commercial entity. 

    Some of the key standards outlined in the regulations are: 

    • Discharge can only be domestic sewage
    • In an area where the water level changes depending on the tide, discharge must be below the mean low water spring mark.
    • Plant must meet the relevant British Standard.
    • Plant must be the correct size for the amount of sewage it will need to treat. This should meet the sizing requirements in British Water’s guidelines.
    • Regular maintenance in line with manufacturer’s instructions should be adhered, and it the system must always be in good working order
    • The system must be regularly emptied – once a year or in line with the manufacturer’s instructions. The company used to dispose of the waste must be a registered waste carrier. 

    If you’re not sure if you meet the regulations, reach out to our team who can advise you on the system right for you and of our standard practices for installation and maintenance.