From the 1st January 2020 if your waste from your septic tank goes directly into a river or stream tour tank must be updated. Don’t wait until the time arrives as it is actually polluting the environment. The new system must meet the british standards and any new tanks or units must have planning permission.
Any new septic tank/sewage treatment unit must have both planning permission and building regulations approval. If it’s been installed since 1 January 2015 and you didn’t get these permissions when it was installed then you should apply retrospectively for them both.
The Environment Agency require you to connect to the mains if your property is within 30 metres of a mains sewer there are special rules for non-standard systems, for example reed beds, and in those cases you should contact the Environment Agency to find out.
If you need any help or general advice to comply with the new legislation get in touch.