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<p>The Environment Agency puts forward storm overflows that spill greater than a given
threshold for investigation by water companies through the Water Industry National
Environment Programme (WINEP).</p><p> </p><p>The spill thresholds currently applied
are shown in the table below and depend on the number of years of Event Duration Monitoring
(EDM) data available. As more data becomes available a tighter threshold of spills
per year is adopted.</p><p> </p><p> </p><p> </p><p>In the period 2020-2025, 727 storm
overflows are currently being investigated. As the provision of storm overflow monitoring
data increases more overflows are being identified as crossing the spill thresholds
and will be put forward for the WINEP. If the investigation shows that it is cost-beneficial
to reduce spills, a scheme would be secured through the WINEP.</p><p> </p><p>The Environment
Agency also investigates storm overflows based on evidence of environmental impact
and/or non-compliance with permit conditions.</p>
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