Answer extracted from The Future of Utilities Podcast — listen to the full episode below.
What motivates customers to adopt water audits?
Money is the strongest motivator for water audit adoption, followed by environmental concerns, according to Thames Water's test of 400,000 smart-metered households. The utility is now moving beyond one-size-fits-all messaging to test whether tailored segment-specific communication performs better than bulk emails.
Testing three messaging strategies at scale
Thames Water divided 400,000 customers into experimental groups and sent different email approaches promoting online water audit calculators. Each email variant emphasized a different psychological driver: financial savings, environmental impact, or responsibility to future generations.
The results were clear: financial messaging outperformed all other approaches in driving customer completion of the audit. Environmental messaging came second, while appeals to future generations proved least effective at moving customers to action.
From bulk messaging to segment-specific targeting
Rather than treating this experiment as a final answer, Arminak Antonian and his behavioral economics team at Thames Water recognized an opportunity to refine the approach further. As detailed in this episode of The Future of Utilities Podcast, the company has now developed hybrid messaging that combines both financial and environmental motives into single communications.
The team is currently testing whether customers respond better when messaging is tailored specifically to their segment than when everyone receives the same generic bulk email. This represents a shift from broadcast campaigns toward precision targeting based on behavioral evidence.
"Awareness raising alone is not really going to do the job because it assumes a rational model of the customer."
Arminak Antonian — Head of Behavioral Economics at Thames Water. Antonian brings academic expertise from his tenure as an economics professor at Cardiff Business School and previous position at a Chinese university. He has designed and implemented behavioral interventions for governments and international organizations across Central Asia and Eastern Europe, tackling challenges from health screenings to tax compliance and plastic waste reduction.
Antonian's point underscores why traditional awareness campaigns—which assume customers will rationally weigh information and make optimal decisions—often fail in practice. Real human behavior is shaped by countless non-rational factors: form complexity, habit, competing priorities, and unconscious biases. A 400,000-customer test provides the statistical power to move beyond assumptions and reveal what actually works.
What makes this behavioral economics approach distinct is the rigor of testing. Rather than guessing which message will resonate, Thames Water systematically measures completion rates across different segments. This data-driven methodology is explored further in the conversation with Antonian, where he explains how behavioral science can address the three main categories of water-saving interventions: technology adoption, audit utilization, and behavioral nudges.
Key takeaways
Key takeaways
- Financial savings messages drive the highest completion rates for water audits, outperforming environmental and intergenerational appeals.
- Thames Water tested messaging effectiveness across 400,000 smart-metered households to identify the strongest behavioral levers.
- Hybrid messaging combining financial and environmental motives is now being tested to determine if segment-specific communication outperforms generic bulk emails.
- Traditional awareness-raising campaigns assume rational customer behavior and often fail—behavioral science reveals what actually motivates real people.
See also
What are the three categories of demand-side interventions that behavioral science can address in the water sector?
Interventions using technology such as smart meters and water-efficient appliances; interventions using audits whether online or offline to identify water usage patterns; and interventions using behavioral nudges to encourage conservation among customers.
What role do smart meters and data analytics play in designing targeted customer interventions?
Smart meters and technological advancements allow utilities to understand customer behavior better and tailor interventions accordingly. Detailed consumption data enables personalized communication strategies rather than one-size-fits-all messaging to all households.
How can water utilities leverage behavioral science to improve customer engagement beyond traditional awareness campaigns?
Behavioral science interventions should be tailored to customers through focus groups, literature review, and rigorous testing. Awareness raising alone is not sufficient because it assumes a rational model of customer behavior; real humans respond to psychological and environmental triggers.