What factor can dramatically affect the absorption rate of a septic system?

The absorption rate of a septic system is highly influenced by various environmental factors, and among them, temperature, soil type, and vegetation all play significant roles.

Temperature affects the microbial activity in the septic system and surrounding soil. Warmer temperatures generally enhance the breakdown of organic matter, which can improve absorption rates.

Soil type is crucial because different soils have varying textures and drainage capabilities. Sandy soils, for instance, typically allow for quicker absorption than clay soils, which retain water and can lead to system saturation and failure.

Vegetation can also influence absorption as plant roots can enhance soil structure, allowing for better water infiltration and absorption. Additionally, plants can absorb some of the liquefied effluent, reducing the overall burden on the system.

Considering all these factors together, it's evident why they collectively influence the absorption rate of a septic system, making the option that includes all of them the most accurate choice.