It has been reported that the Bloemfontein laboratory failed to meet the international agency’s quality standards. As such, WADA will now closely monitor the drug-testing laboratory at the University of the Free State and will conduct regular site inspections.
South Africa is due to host the African track and field championships in June, but WADA's decision will complicate the doping control programme for that event with organisers now set to have to fly samples to a lab on another continent.
The South African lab previously said it would be upgrading its facilities for six months from the beginning of April, and would send some samples to Doha, Qatar, to be tested during that time.
Bloemfontein is the latest facility to lose its accreditation. Last month, WADA suspended the accreditations of doping labs in Beijing, Lisbon and Portugal, and revoked the accreditation of the lab in Moscow following allegations of wide-ranging corruption in the Russian anti-doping program.
In March 2016, Brazil just avoided losing the accreditation of its lab in Rio de Janeiro, which needs to test thousands of doping samples at the Olympics in August.