The Eastern Cape, North West, and KwaZulu-Natal reported increases, according to Stats SA's Non-Financial Census of Municipalities, June 2013.
In North West, 1481 households were using the bucket toilet system in 2012. This increased to 1750 in 2013.
In KwaZulu-Natal, no households were using the bucket system, but in 2013, 1585 were using it, according to Stats SA.
The number of households using the system in the Eastern Cape increased from 38,606 to 52,732. The province had the highest number of households using the bucket toilet system.
Democratic Alliance MPL in the Eastern Cape, Nokonwaba Matikinca, said the increase was shocking.
"The bucket system is an assault on the dignity of our citizens," she said in a statement.
"It is unacceptable that people have to live in contravention of Section 24 of the Bill of Rights in our Constitution which states that 'everyone has their right to an environment that is not harmful to their health or well-being'."
According to Stats SA the number of households using the bucket system decreased between 2012 and 2013 in Gauteng, Western Cape, Northern Cape, and Free State.
In Gauteng the number dropped from 160 to 58; in the Western Cape it decreased from 3804 to 2598; Northern Cape decreased from 9286 to 8147, and the Free State went down from 35,214 to 31,032.
Limpopo reported no use of the bucket toilet system in 2012 or 2013, Stats SA said.