Following the 2025 DEFRA bathing water classifications, we are sharing an update on storm overflow performance associated with bathing waters across England for the 2025 season (15 May to 30 September). This year has seen an overall improvement: both the frequency and duration of storm overflow events has reduced. Storm Overflow Performance The data for 2025 shows: · Average spills per overflow: 5.9, down from 7.7 in 2024. · Average spill duration: 2.8 hours, compared to 3.9 hours last year – a.