The article states:

First, salt and impurities such as viruses and even traces of medicine must be removed. Then, the wastewater will be channeled into a lake or reservoir. There, it will be blended with fresh water. Eventually, the water will be pumped to the water-treatment facility. Once there, it will undergo several more rounds of cleaning, disinfection, and testing before finally reaching home faucets.
The author's purpose for writing this passage was to __________.

Provide an explanation as to why residents are against the plan to recycle sewage
Describe the process used to sanitize wastewater and make it safe to drink
Explain why recycled sewage water has that distinctive briny flavor
Support critics who argue that recycling sewage is a costly and ineffective solution

Describe the process used to sanitize wastewater and make it safe to drink