What should you do if testing indicates toxins in water from cyanobacteria?

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When cyanobacteria toxins are detected in drinking water, the safest course is to switch to an alternate water source, such as bottled water or another supply confirmed toxin-free, and follow local public health advisories. Boiling water does not remove cyanotoxins and can concentrate them, chlorine disinfection is not reliably effective against these toxins, and many common home filtration systems may not remove them either. Use the alternate source for drinking, cooking, and preparing infant formulas until tests show the water is safe.