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The manufacturing of pentachlorophenol officially came to an end in December of 2021. This was the last location anywhere in the world that made pentachlorophenol.  However, penta will continue to be available from some pole producers for at least another year. Pole treating plants are working through their penta inventories while others have already converted…

They provide long-term efficacy with low environmental impact. They are the first major innovation in years for utility infrastructure, with 28 years of performance data for treated wood pole and crossarm protection.

Generally linemen will not notice a difference between DCOI and penta treated poles other than it’s lower odor and is also easy to climb.