Concerned about mercury levels in the Great Salt Lake, Salt Lake City Mayor Rocky Anderson is urging the Nevada State Environmental Commission to set specific targets for mercury reduction. On Wednesday, the commission will hold a public hearing on the regulation of mercury emissions from Nevada gold mines, which are suspected of poisoning the Great Salt Lake and the state's fish and waterfowl. Noting that mercury exposure can cause serious health problems, Anderson said Nevada's proposal is "insufficient to ensure the quality of life for residents in surrounding states" because it does not include reduction targets. "While it is not customary for officials from one state to concern themselves with the regulatory practices of another state, recent research on mercury levels in the Great Salt Lake compels me to write to you," Anderson said in his letter to the commission chairman. Anderson's letter notes concerns raised by Utah's waterfowl hunters, who have urged Gov. Jon Huntsman Jr. to weigh in on Nevada's plan. Utah imposed two "do not eat" warnings on two duck species because some birds had mercury levels up to 40 times above those deemed safe. Utah's environmental regulators have said they don't plan to submit comments. Anderson sent a copy of his letter to Huntsman and Utah's congressional delegation.