The USEPA maintains a list of 126 chemicals and toxic metals that may cause interferences or pass through in a POTW: this list is called the priority pollutants list (PPL). How many chemicals are on this list?

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Multiple Choice

The USEPA maintains a list of 126 chemicals and toxic metals that may cause interferences or pass through in a POTW: this list is called the priority pollutants list (PPL). How many chemicals are on this list?

Explanation:
The list your question is referring to is called the Priority Pollutants. This name signals that these substances are given special regulatory attention because they can cause problems for a wastewater treatment plant or pass through into the environment. The EPA page for this set notes it includes 126 chemicals and toxic metals, which matches the detail in the prompt. So, the best answer is Priority Pollutants, since that is the official designation for this EPA list. The other options aren’t the official name used for this specific compilation.

The list your question is referring to is called the Priority Pollutants. This name signals that these substances are given special regulatory attention because they can cause problems for a wastewater treatment plant or pass through into the environment. The EPA page for this set notes it includes 126 chemicals and toxic metals, which matches the detail in the prompt. So, the best answer is Priority Pollutants, since that is the official designation for this EPA list. The other options aren’t the official name used for this specific compilation.

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