The NYC water supply seemed OK after the attack

• In extensive testing on 9/15, EPA found no contamination in the New York City water supply above acceptable levels (http://epa.gov/enviro/nyc/drinking_water.html).
• The NYC Department of Health found no evidence of biological contamination in the days after the attacks (http://www.cdc.gov/mmwr/preview/mmwrhtml/mm5038a1.htm).

But could the next attack be on our water?