Well if your in California or Canadia your OK...
I want to know what the averages are here in Michigan but havent found anything yet.

The world-leading California standard limits sulphur content to an average of 30 ppm. This standard must be met in Canada in 2005, under a regulation adopted by the Government of Canada in 1999. Imperial Oil and other oil companies still oppose early phase-in of this health-protection regulation.