Is ocean water cleaner than pond water?

In general, ocean water is often considered cleaner than pond water due to its larger volume and continuous mixing, which helps dilute pollutants and pathogens. However, ocean water can still be contaminated by various sources, such as plastic pollution and runoff. In contrast, pond water is more prone to stagnation and can accumulate higher concentrations of bacteria, algae, and other contaminants. Ultimately, the cleanliness of either water source can vary greatly depending on local environmental conditions and human activity.