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How South West Water used data to tackle water poverty and cut debt

The problem

South West Water (SWW) aims to eradicate water poverty in the South West. SWW has to be efficient given the already high costs of serving a sparse coastal population. Its offer includes efficiency measures, smart meters, debt support and a 15-85% off WaterCare tariff. Like all water companies, awareness of support was low. Brett Conibere, Head of Customer Insight, Support Services and Metering said: “We cannot wait for people to come to us”.

What they did

SWW partnered with CACI, an analytics company, to build a high resolution view of estimated water affordability down to groups as small as 12 households. SWW segmented customers, offering efficiency measures and smart meters where that was enough to bring them out of water poverty, and providing additional support like their WaterCare tariff where it was needed.

Behind the scenes

Technically, SWW and CACI combined several data sets, including matching SWW’s billing data and CACI’s Ocean data set (which draws on Electoral Roll, research surveys, open data, government data and other sources) at postcode level, along with other data sets like OBR’s income forecasts, to estimate water poverty at household level. To enrol customers onto social tariffs, benefit receipt was checked with DWP through an API. Legally, CACI’s data is aggregated facing fewer data governance hurdles. DWP’s API relies on the Digital Economy Act Section 38 to assist people in water poverty.

Impact on customers

By the end of 2024, SWW has helped over 1,000 customers with water efficiency measures and over 2,000 with smart meters, on top of the 26,000 customers enrolled onto WaterCare. And this is only the beginning: by 2030, SWW plans to have supported 1 in 10 customers with water efficiency measures.

Impact on the utility

SWW found customers more willing to engage in other support when coupled with financial support. Despite the cost of living crisis, SWW’s commitment to aiding and supporting customers struggling with debt has decreased its doubtful debt charge by 45% from £16 million in 2012-13 to £8 million in 2023-24.

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