The EPA tested the water along the coast of California and found that it was high in phosphates and nitrates. What might the EPA be MOST concerned about?

The EPA might be most concerned about the impact of high levels of phosphates and nitrates on marine life and ecosystems in the coastal waters of California. These nutrients can lead to algal blooms, which can deplete oxygen levels in the water and harm marine organisms. Additionally, excess nutrients can contribute to water pollution and impact the overall health of the coastal environment.