Sewage may make toxic fertilizer
The Associated Press also has learned that some of the same contaminants showed up in milk that regulators allowed a neighboring dairy farmer to market, even after some officials said they were warned about it.
In one case, according to test results provided to the AP, the level of thallium — an element once used as rat poison — found in the milk was 120 times the concentration allowed in drinking water by the Environmental Protection Agency.