• 3.0%, and
• 2.0% on an annual basis.

• 2.2%, and
• 2.0% on an annual basis.

• 2.2% by mass, and
• 2.0% on an annual basis.

• No. 4 - 1.5 %
• No. 5 - 2.0%
• No. 6b - 3.0 %
• No. 6c - 3.0%

• Intermediate Oil: 1.0%
• Heavy Oil: 2.0%

• 1.5% as of March 1, 2006
• (no limit if facility has sulphur recovery; 1% equivalent limit for refineries simultaneously using lower sulphur fuel)

• No. 6 = 1.25% to 1.4%

• Sulphur dioxide for regulated sectors and facilities.
• Reductions that can be achieved through lower sulphur HFO have been incorporated: assumes 1% HFO use by iron & steel and pulp & paper sectors by 2010.

• 1.5%

• 1.0% ; and
• sulphur content providing a maximum rate of wet sulphate deposition of 0.1 kilogram per hectare per year (in areas set out in Schedule).

Regulation applies to boilers (equipment used for producing hot water or steam) using fuel oil or coal as fuel and excludes:

• boilers at OPG electric generating stations,
• boilers in dwellings housing max 3 families,
• buildings using natural gas or No. 2 oil; and
• holders of certificate of approvals where resulting emissions correspond to burning 1% sulphur in fuel.

• 1.1%