If your home or property has a septic tank or package sewage treatment plant, it is a legal requirement to register it. For most, this is a free registration. In certain circumstances however your private sewage system may require further permission.
If you have received notification from Natural Resources Wales that you are not eligible for a free registration, you will need to apply for an environmental permit.
What to do next
If you have been refused a registration for your sewage system, you will need to apply for a bespoke permit to discharge treated domestic sewage effluent.
Apply for a bespoke permit to discharge treated domestic sewage effluent up to fifteen cubic metres (15m3) a day into ground or up to twenty cubic metres (20m3) a day to surface water.
Email your completed forms to:
or post to:
Permit Receipt Centre
Natural Resources Wales
29 Newport Road
Why has my registration been refused?
Your septic tank or package sewage treatment plant registration will have been refused for one of the following reasons:
- your property has more than 13 people living there and the septic tank discharges to a soakaway in the ground
- your property has more than 33 people living there and your package sewage treatment plant discharges to a watercourse
- your sewage system is near a protected or designated area, such as a Site of Special Scientific Interest (SSSI) or Source Protection Zone
- your sewage discharge is 50 metres or less from a borehole or well
- your property is within 30 metres of the public foul sewer
Most septic tanks or package sewage treatment plants do not cause problems when they are well maintained. Discharge from poorly maintained systems can pollute rivers, streams and underground water or harm nature conservation sites. To ensure sewage systems near sensitive areas are operating efficiently, Natural Resources Wales attach certain conditions to their use, through an Environmental Permit.