In MS4 programs, street sweeping frequency is often higher in which areas?

In MS4 programs, street sweeping frequency is often higher in which areas?

• A. High-pollution zones.
• B. Rural areas.
• C. Forested parkland.
• D. Areas with no traffic.

Answer: (A)

MS4 programs aim to prevent pollutants from entering the storm sewer system, so sweeping is concentrated where pollutant loading is highest. In high-pollution zones there’s more road dust, litter, oil residues, and fine sediments that can be washed off during rain events. Sweeping these areas more often captures more of that material before it reaches storm drains, reducing the amount of sediment and contaminants that can reach surface waters. Rural areas usually have less impervious surface and fewer pollution sources, forested parkland filters debris naturally, and areas with no traffic generate far less material to sweep, so they’re swept less frequently.

MS4 programs aim to prevent pollutants from entering the storm sewer system, so sweeping is concentrated where pollutant loading is highest. In high-pollution zones there’s more road dust, litter, oil residues, and fine sediments that can be washed off during rain events. Sweeping these areas more often captures more of that material before it reaches storm drains, reducing the amount of sediment and contaminants that can reach surface waters. Rural areas usually have less impervious surface and fewer pollution sources, forested parkland filters debris naturally, and areas with no traffic generate far less material to sweep, so they’re swept less frequently.