Despite having the legal power to fine up to £1,000, companies say they have relied on public goodwill for compliance during multiple bans imposed since 2020.
Campaigners argue that water companies' own failings, such as leaking pipes and underinvestment, pose a greater threat to supplies than household water use.
The water sector faces scrutiny over a 60 per cent rise in serious pollution incidents in 2024, prompting government plans to overhaul regulation and scrap Ofwat.
Experts warn that the UK is running out of water, stressing the need for broader solutions beyond hosepipe bans, including everyone reducing water waste.