Siloxane D4 in industrial effluents: pollution prevention planning notice

Note: All facilities that became subject to this notice when it was published have met the requirements of the notice.

However, this notice remains in effect. Other facilities can still become subject to the notice and will then be required to prepare and implement a pollution prevention plan as per the deadlines below.

This notice applies to any owner or operator of:

For more details, refer to the siloxane D4 in industrial effluents notice.

If you are uncertain whether you are subject to the notice, contact us for clarification or to obtain a notification of non-engagement form.


If you became subject to the notice after June 2, 2012, you must:


You must complete and submit reports as required (see deadlines above).

Performance results

By July 1, 2017, the 6 facilities subject to the notice had submitted their final declaration (schedule 5 of the notice) summarizing the outcomes of their implemented pollution prevention plan. Five of the facilities have met the reduction target which consists either in reducing the D4 concentration in their effluents to a level that is less than or equal to 17.3 μg/L or in releasing a total quantity of D4 in their effluents that is less than or equal to 3 kg per year. The sixth facility also has fully implemented its pollution prevention plan but, despite achieving significant reductions in its D4 releases, it has not met the reduction target set out in the notice. For more information, see the performance report.

Time Extension

Les Emballages Knowlton Inc. (LEKinc.) was granted a time extension to prepare their pollution prevention plan. The deadline was extended to October 1, 2013.

Related information

Past consultations

Contact us

Technical inquiries regarding the content of this notice:
Chemical Production Division

Inquiries regarding reporting and pollution prevention practices:
Regulatory Innovation and Management Systems
Telephone: 1-844-580-3637

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