The largest releases occurred in Arizona and Montana. The greatest releases to water occurred in Washington and Louisiana. Little is known about antimonys fate once released to soil. Some studies indicate that antimony is highly mobile in soils, while others conclude that it strongly adsorbs to soil. In water, it usually adheres to sediments.
Most antimony compounds show little or no tendency to accumulate in aquatic life.
The regulation for antimony became effective in 1994. Between 1993 and 1995, EPA required your water supplier to collect water samples every 3 months for one year and analyze them to find out if antimony is present above 6 ppb. If it is present above this level, the system must continue to monitor this contaminant. If contaminant levels are found to be consistently above the MCL, your water supplier must take steps to reduce the amount of antimony so that it is consistently below that level. If the levels of antimony exceed the MCL, the system must notify the public via newspapers, radio, TV and other means.