Primary standards protect public health by limiting the levels of contaminants in drinking water.
For copies of the complete regulations regarding these contaminants, follow these links to the National Primary Drinking Water Regulations and National Secondary Drinking Water Regulations . Higher turbidity levels are often associated with higher levels of disease-causing microorganisms such as viruses, parasites and some bacteria. These organisms can cause symptoms such as nausea, cramps, diarrhea, and associated headaches. People with Wilson's Disease should consult their personal doctor if their water systems exceed the copper action level. Delays in physical or mental development.