Blocked sewers are major problem for Joburg Water, which clears about 4 500 blocked pipes a month. Picture: Supplied Every month Joburg Water (JW) clears more than 4 500 blocked drains and sewers and what they find in those blockages will make your skin crawl. Spokesperson Nombuso Shabalala said teams routinely remove problematic items from blocked sewers, including clothing, rags, towels, hair extensions, plastic bags, stones, sand, building rubble and even toys.
“Blocked sewer pipes remain one of the major operational challenges faced by JW and in many instances, these blockages are caused by items that should never be disposed of through the sewer system,” she said. In October, JW cleared 5 278 of the reported 6 448 blocked sewers around the city. Shabalala said these sewer blockages can result in overflows, environmental pollution, health risks, service disruptions and costly emergency repairs.
JW has 38 sewer pump stations, an 11 816km sewer network and six wastewater treatment works to serve a city with more than six million residents. They generally clear in excess of 4 500 blockages a month. Currently, there are 152 sewer blockages per 100km of network in Johannesburg.
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Joburg Water treats 1 043 million litres of sewage per day at its treatment plants. Flushable wipes, sanitary pads, nappies, fat, oil and food scraps are major culprits in blocked sewers. Cooking oil – wait for it to cool, pour into a milk carton and put in the bin.
You can also use paper towels to soak up fat. It goes into the bin. Shabalala said fats, oils and grease from household cooking are a significant contributor to sewer blockages. “When poured down sinks, these substances cool and harden inside pipes, forming large obstructions that restrict flow and can lead to sewer overflows,” she said.
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