Its coastline near the emptying rivers are heavily polluted. Groundwater in karst areas is just as easily polluted as surface streams. Some rivers and streams are also polluted by mining. This has left the water looking stagnant, polluted and murky. The waterways of the town had been polluted by PCBs from the plant. The water grows progressively more polluted as it passes downstream. Cholera from polluted water and typhoid were endemic. The people who drink the polluted water can become infected. Wastewater may also be polluted with organochlorine compounds. Elevated temperatures can also lead to polluted water. Industrialization had already polluted the river. Huge areas were polluted by radioactive elements. The modified fish turned green if placed into water that was polluted by oestrogen. DeSantis has promised to stop the spread of polluted water from Lake Okeechobee. This entire reach is grossly polluted.