Health Warning Issued for Te Weta Bay, Lake Rotoiti February 11th, 2020 2005-12-06T07:59:41+13:00 [14 November] BOPDHB have issued a health warning (PDF) regarding cyanobacteria at Te Weta Bay in Lake Rotoiti, affecting water in the Kaituna river. Update, 6 December: BOPDHB have issued a press release lifting the health warning on Lake Rotoiti.