One of the requirements of the Lead and Copper Rule is for water systems to_____________if the action levels for lead or copper are exceeded.

The requirement for water systems to install corrosion control is a critical aspect of the Lead and Copper Rule. This regulation, enacted by the Environmental Protection Agency (EPA), aims to protect public health by minimizing exposure to lead and copper in drinking water. When action levels for these metals are exceeded, it indicates that corrosion of pipes or plumbing materials is occurring, which can lead to increased levels of lead and copper leaching into the water supply.

Corrosion control involves implementing various methods to prevent this leaching, such as adjusting the water's pH, alkalinity, or adding specific chemicals that can create a protective layer inside the pipes. This intervention is vital for maintaining water quality and ensuring that the water remains safe for consumption.

Other options, such as reducing water pressure, increasing chlorine dosage, or filtering the water, do not address the root cause of lead and copper leaching. While these methods may have their importance in water treatment, they are not effective solutions for corrosion control in the context of the Lead and Copper Rule.