These sewage treatment plants are designed to cater for 6-9 bedroom properties or where up to 18 people are occupying the property.
These units are all certified to the European standard EN-12566.
In 2005, a new European Performance Standard was introduced. EN-12566 requires manufacturers to submit their product to a testing regime that accurately measures the performance of treatment plants up to 50 population.
These tests identify how much pollution the treatment plant removes from the sewage, what level of maintenance is required, and what power is absorbed.
By holding EN-12566 certification, the Clearwater treatment plant is approved for an exemption from a permit to discharge under the new EPP2 environmental legislation.