 However, according to the Consumer Confidence Report issued by the city of Hanford in March 2010 for calendar year 2009, since November 2009, the city has supplied water that is below the federal standard of 10 micrograms of arsenic per liter of water.The city's mitigation project consisted of reducing the arsenic content in two existing deep water wells, drilling five replacement wells, and eliminating eight wells that produced water that exceeded standards.Although it does not pose a health hazard, Hanford's drinking water also naturally contains hydrogen sulfide, which caused the water to have a noticeable "rotten egg" odor.