*An HSEES event is the release or threatened release of a hazardous
substance(s) into the environment in an amount that requires (or would have
required) removal, clean-up, or neutralization according to federal, state,
or local law.3 A hazardous substance is one
that can reasonably be expected to cause an adverse health effect.
†During 1993-2004, a total of 17 state health departments participated
in HSEES. State health departments in Alabama, Colorado, Iowa, New York, North
Carolina, Oregon, Texas, Washington, and Wisconsin participated during the
entire period. Eight state health departments participated during portions
of this period: Louisiana (2001-2004), Minnesota (1995-2004), Mississippi
(1995-2004), Missouri (1994-2004), New Hampshire (1993-1996), New Jersey (2000-2004),
Rhode Island (1993-2001), and Utah (2000-2004).
‡Data for 2003 and 2004 are preliminary.