The boy, Samuel Matshusa, had been playing with his friends near the pit, in Mugwazeni village, Letsitele. It was filled with rain water and he apparently fell in and drowned. His body has been recovered.
Matshusa was at least the third child to drown in a pit toilet since January last year.
Three-year-old Hlumisa Makhasi drowned in a pit toilet, in France township on the outskirts of Pietermaritzburg, KwaZulu-Natal in December last year.
In January last year, six-year-old Michael Komape drowned in a pit toilet at the Mahlodumela Primary School in Chebeng village outside Polokwane, Limpopo.