What type of water bodies are excluded from Category 3a applications?

Swimming pools are excluded from Category 3a applications because this category specifically pertains to the control of aquatic pests in natural water bodies such as lakes, rivers, ponds, and streams. These environments often require different considerations regarding the types of pests present, the application methods used, and the impact of pesticide use on aquatic life and water quality.

In contrast, swimming pools are controlled environments that do not support the same types of aquatic ecosystems. The water in swimming pools is typically treated primarily for human use, focusing on sanitation and health rather than managing aquatic pests common in natural bodies of water. Therefore, the regulations governing pesticide applications in natural water bodies do not apply to pools, making them an exception in this category.