by perchlorate | Sep 1, 2022 | Science
California’s current MCL is “final” in that it is currently enforceable, but is under review by regulatory authorities as part of a review process required by state law. At the federal level, the U.S. EPA has decided to set a national drinking water...
by perchlorate | Sep 1, 2022 | Science
Following a mandatory five-year review mandated by state law, California proposed revising its Public Health Goal (PHG) for perchlorate from 6 ppb to 1 ppb. The State Water Resources Board is now conducting research to determine how frequently perchlorate is found in...
by perchlorate | Sep 1, 2022 | Science
EPA’s 24.5 ppb reference dose (the maximum dose without any risk, abbreviated RfD) may be used by officials across the U.S. to make site-specific cleanup or interim drinking water standard decisions involving perchlorate. States and private parties also may look...
by perchlorate | Sep 1, 2022 | Science
Perchlorate is being contained, removed and treated at sites where it has been used for manufacturing. New state-of-the-art technologies for removing perchlorate from water have been developed and put to use. Others are being developed or refined.
by perchlorate | Sep 1, 2022 | Science
RfD is defined by the EPA as, “an estimate of a daily oral exposure to the human population (including sensitive subgroups such as children) that is not likely to cause harmful effects during a lifetime.” See the definition of reference dose on the EPA...
by perchlorate | Sep 1, 2022 | Science
Typically, EPA derives an RfD by starting with the highest dose at which no adverse effects can be observed (the No Observed Adverse Effect Level, or NOAEL). Learn more abou how the U.S. EPA sets RfD» It is unprecedented to use the level at which no effect, even a...
