Musina residents were "on the verge of a mass uprising" due to corruption and poor service delivery, the SA Municipal Workers' Union in Limpopo said on Friday.

"Samwu members from the Musina local municipality in Limpopo province have discovered grave corruption and malpractice... these findings have emerged in cheques, bank statements and financial reports of the municipality," it alleged in a statement.

"The situation in Musina is tense and on the verge of a mass uprising."

Workers were "sick and tired of the lack of service delivery". Roads were riddled with potholes, municipal vehicles were poorly maintained and there was "blatant corruption" by municipal managers.

Citing "compelling evidence", Samwu said the municipality's finances were in the red.

"The municipality has incurred a deficit of R552 467.43 this year during an annual show hosted by the municipality, which was riddled with corruption," the union claimed.

Samwu had asked the ANC's regional executive committee to intervene "immediately", and would raise alleged corruption, unfilled vacancies, poor service delivery, political interference in the administration of the municipality and companies operating without proper contracts with the party.

"If these issues are not dealt with as a matter of urgency, we will find ourselves experiencing a situation similar to what the country experienced in Diepsloot and Lekwa municipalities."

After recent service delivery protests in Standerton, Mpumalanga, the ANC stepped in. As a result the Lekwa municipality mayor and a number of councillors were fired.

The Musina municipality could not immediately be reached for comment.