Health officials in Wisconsin and Minnesota are re-evaluating the effectiveness of efforts to get the word out about the dangers of mercury in fish. Mercury can cause developmental and neurological problems, especially in fetuses and young children. Most Minnesota and Wisconsin lakes are contaminated with mercury as a result of airborne pollution, and both states publish advisories indicating how much fish people should eat from various lakes. But a recent study showed only about a fourth of Wisconsin women of childbearing age know about the advisories. Minnesota Public Radio's Stephanie Hemphill reports. Mercury accumulates in the flesh of fish. The older and larger a fish, the more contanimated it's likely to be. Minnesota's advisories are lake-specific suggesting limits depending on fish size and the age of the consumer. For instance, it tells children - and women who might have children - they should not eat 20-inch or larger walleye from the St. Louis River near Duluth. And they should limit their meals of smaller walleye to one each month. But how are non-angling fish-eaters to know that? For years the advisories have been available with fishing licenses and at bait shops. The Wisconsin DNR's Jim Amrhein (AM-rine) says the word isn't getting from the anglers to their families.