Which of these potential sources of water pollution is excluded from the Clean Water Act? A. Agricultural runoff B. Oil tankers C. Lakes, rivers, and streams D. Drainage pipes

## Step 1<br />The Clean Water Act is a federal law in the United States that regulates the discharge of pollutants into the nation's waters. It is important to understand what this law covers and what it does not.<br /><br />## Step 2<br />The Clean Water Act regulates the discharge of pollutants into the nation's waters. This includes oil tankers, which are considered as point sources of pollution. Point sources of pollution are discrete conveyances, such as pipes or man-made ditches.<br /><br />## Step 3<br />The Clean Water Act also regulates agricultural runoff. This is considered as a non-point source of pollution. Non-point sources of pollution are diffuse and do not have a single point of origin.<br /><br />## Step 4<br />The Clean Water Act regulates the discharge of pollutants into lakes, rivers, and streams. These are considered as point sources of pollution.<br /><br />## Step 5<br />The Clean Water Act regulates the discharge of pollutants into drainage pipes. These are also considered as point sources of pollution.<br /><br />## Step 6<br />However, the Clean Water Act does not regulate agricultural runoff. This is because agricultural runoff is considered a non-point source of pollution, which is not regulated by the Clean Water Act.