What are the common causes of a foul smell in well water and how can it be remedied?

Common causes of a foul smell in well water include bacteria, sulfur, or decaying organic matter. To remedy this, shock chlorination can be used to disinfect the well and kill bacteria. Installing a water filtration system or aeration system can also help remove sulfur and other contaminants causing the odor. Regular maintenance and testing of the well water can help prevent future issues.