Joseph 'Hohepa' Harawira QSM (13 March 1946 – January 2017) was a Māori kaumātua (elder) and environmental campaigner in New Zealand, prominent for raising issues of dioxin poisoning around Whakatāne in the Eastern Bay of Plenty.

Harawira spent the last 30 years of his life seeking recognition for workers at the Whakatane Sawmill harmed by workplace chemical poisoning.

For many decades, the mill had dumped contaminated sawdust, bark, scrap timber, and chemicals in and around Whakatane and the Rangitaiki Plains, including the Kopeopeo Canal, which was sometimes called New Zealand's most polluted waterway.

Between 1950 and 1989, these canals received point-source discharge containing waste from the timber treatment mill, where PCP had been used as a wood preservative.

[9] MP Te Ururoa Flavell, co-leader of the Māori Party, said Harawira's "ground-breaking campaign resulted in significant transformative outcomes for the people and land of Ngāti Awa.