State and Local Stringency

The Clean Air Act allows state and local air pollution control agencies to adopt programs more stringent than those of the federal government.  In reality, most state agencies are still not able to adopt more stringent programs, due to state or local law, regulation, policy or other restrictions.  NACAA conducted a survey of state and local air agencies in September and October 2014 and discovered that over one-half of state respondents are precluded from adopting measures more stringent than federal requirements, or may do so only under special circumstances. Read Restrictions on the Stringency of State and Local Air Quality Programs (December 8, 2014) for details on the survey results.