...as if the danger was that ISIS would poison the water supply with a biological toxin. Nope.
The real and present danger is ISIS actually wants to activate the chlorine gas by throwing in something acidic. That's why the anxiety extends not just to water treatment plants with stores of chlorine but also swimming facilities and any other source of chlorine.
Over 16,000 suspected ISIS operatives in France under surveillance by DSCG etc with more off radar. That's the alleged focus right now of the Islamic terrorist hive mind. Finding the chlorine.