Wednesday, September 09, 2015

Is A Smog Standard of 70 Really Good Enough? Here's What EPA's Science Advisers Said About the Need for a Tougher Smog Standard

...Although a level of 70 ppb is more protective of public health than the current standard [of 75], it may not meet the statutory requirement to protect public health with an adequate margin of safety.
In this regard, the CASAC deliberated at length regarding advice on other levels that might be considered to be protective of public health with an adequate margin of safety. For example, the recommended lower bound of 60 ppb would certainly offer more public health protection than levels of 70 ppb or 65 ppb and would provide an adequate margin of safety. Thus, our policy advice is to set the level of the standard lower than 70 ppb within a range down to 60 ppb 

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