Cylindrospermopsin in drinking water is not currently regulated by the U.S. Environmental Protection Agency. Several states have guidelines for utilities for monitoring and addressing cylindrospermopsin and other cyanotoxins in drinking water. You can contact your water utility to determine how cyanotoxins are addressed in your state.
In 2015, EPA issued a drinking water health advisory for cylindrospermopsin. Health advisories are non-regulatory levels to assist public health professionals. No negative health impacts are anticipated at these concentrations. EPA has provided two different ten-day health advisory levels – 0.7 microgram/liter for bottle-fed infants and young children and 3.0 micrograms/liter for school-aged children and adults.
Regulators, utility managers and public health officials use health advisories to consider what management practices are necessary and if additional actions are necessary when cylindrospermopsin is found.