How much detergent is in runoff?

The amount of detergent in runoff can vary widely depending on factors such as the type of detergent used, the frequency of washing, and local regulations regarding wastewater treatment. In urban areas, studies have shown that detergent concentrations in runoff can range from a few micrograms to several milligrams per liter. However, specific measurements can differ significantly based on the presence of impervious surfaces, household practices, and stormwater management systems. Overall, while detergents are present in runoff, their concentrations are typically monitored to minimize environmental impact.