The city council said on Saturday that a chemical-clean of the water system was taking longer than the expected 36 hours, and that bottled drinking water and alternative bathing facilities were being provided.
What is becoming clearer with time is that the chemical dispersants typically used in clean-up efforts to break masses of oil up into small droplets does more harm than good.
As he returned from Baghdad this week, Mr Butler said that he was close to giving Iraq a clean bill of health on missiles and chemical weapons, but was still far from that point in the biological field.
Thanks to that treaty, countries like Iran that are known to have ongoing covert chemical-weapons programs are being given a wholly unwarranted clean bill of health.