Which statement best describes the impact of poorly performing inlet protection on downstream water quality?

Which statement best describes the impact of poorly performing inlet protection on downstream water quality?

• A. It has no impact on downstream areas.
• B. It can improve water quality by filtering sediment.
• C. Poorly functioning inlet protection can lead to sediment entering receiving waters and downstream areas.
• D. It only affects upstream areas.

Answer: (C)

Inlet protection is meant to trap sediment before stormwater leaves the site, so it helps keep downstream water clean. When that protection is functioning poorly, sediment isn’t retained and can be washed into receiving waters and downstream areas. This increases turbidity, can harm aquatic habitat, and leads to sediment buildup downstream, all of which degrade water quality. The idea that there is no downstream impact or that it would improve water quality if it’s not working correctly is not accurate, and runoff clearly affects downstream as it moves with the flow, not just upstream.

Inlet protection is meant to trap sediment before stormwater leaves the site, so it helps keep downstream water clean. When that protection is functioning poorly, sediment isn’t retained and can be washed into receiving waters and downstream areas. This increases turbidity, can harm aquatic habitat, and leads to sediment buildup downstream, all of which degrade water quality. The idea that there is no downstream impact or that it would improve water quality if it’s not working correctly is not accurate, and runoff clearly affects downstream as it moves with the flow, not just upstream.