Endothall may not be permitted for use in a public water supply watershed. Which option is correct?

• A. Endothall may not be permitted for use in a public water supply watershed.
• B. Endothall is freely used in all watersheds.
• C. Endothall is only allowed in non-public waters.
• D. Endothall has no restrictions.

Answer: (A)

Protecting drinking water quality is the key idea. Regulations restrict applying pesticides in or near watersheds that supply public drinking water to prevent residues from reaching intakes. Endothall is an aquatic herbicide that can affect water quality, so its use is not allowed in a public water supply watershed. That makes the statement stating Endothall may not be permitted in a public water supply watershed the correct one. The other options imply there are no restrictions or universal permission, which isn’t true because watershed protections limit pesticide use near public drinking water sources.