Philadelphia Worker and Community Right-to-Know Act
The Philadelphia Worker and Community Right-to-Know Act requires employers that use any of 450 chemical substances to file Material Safety Data Sheets with various local government agencies. (An additional list of 99 chemicals will trigger the filing requirement if they are emitted from the workplace.) Material Safety Data Sheets must be made available to the public, upon request, through the governmental agencies where they are filed. Containers of these chemicals must be clearly labeled. (This was the first municipal right-to-know law.)
Cry Wolf Quotes
[I]t is conceivable that this trade secret data would be considered so valuable that a company would elect not to do business in Philadelphia rather than disclose it and so I have detailed our concerns on the issue of confidentiality.
When the City Council was considering the right-to-know law, lobbying was intense. Those opposed to it argued that the tough regulations would drive businesses from the city. That threatened exodus has not happened.
Then without regard for exposure concentration in the air, City Council is being asked to make it against the law to ‘receive, store, use manufacture or transport’ any substance on that list without first burdening the citizen and the City Administration with more red tape.
To me it is just damned incompetent to consider legislation without knowing what the cost is going to be. In business we couldn’t do this. We couldn’t have jobs if we ran our business that kind of way.
Backgrounders & Briefs
Dying To Know: A Historical Analysis of the Right-To-Know Movement
This survey provides a sweeping analysis of the right-to-know movement in America.

