*Note: These rankings are based on chemical releases and transfers reported
by industrial facilities to the Toxics Release Inventory, and do not
take into account major sources of pollution or toxic chemicals that are
not covered by TRI.
Some chemicals are associated with more than one health
effect, so their release may be counted multiple times in this
table. Therefore, it is not appropriate to sum releases sorted by
health effect. Total reported releases to air and water are
provided in the data summary below.