Cleaning and Protecting the Puget Sound
Changing water chemistry is making marine waters more acidic. As the Pacific Ocean and Puget Sound absorb more carbon dioxide from fossil fuel use and deforestation, the acidification of the water negatively affects marine organisms that need strong shells and skeletons such as shellfish, plankton, and fish.
Bacteria in Puget Sound can come from a number of sources but especially animal waste, human waste from faulty septic systems, waste discharges from boats, sewage overflows, wastewater treatment plants, and contaminated stormwater runoff. Too much bacteria pollution can close harvest of shellfish beds or make saltwater beaches unsafe for swimming.
Low levels of dissolved oxygen combined with high levels of nitrogen can stress and even suffocate marine life. While some natural influences can lower oxygen levels, many human-generated nitrogen sources contribute to the problem, including heavy fertilizer use, livestock manure, septic systems, and wastewater treatment plants. Too much nitrogen fuels excessive marine algae growth, which then die and decompose, consuming oxygen.
Toxic chemicals in Puget Sound enter, in large part, from the small, steady release of toxic chemicals in everyday products, such as the brakes on our vehicles, flame retardants in our furniture, softeners in plastic, and building and roofing materials. As we use and dispose of these products, the toxic chemicals they contain can enter rivers, lakes, and the sound. Toxics accumulate in fish and marine mammals.