About this dataset
How discharge data works on WaterWatch
operates monitored storm overflow sites. Every site is fitted with an Event Duration Monitor (EDM) that records when an overflow starts discharging untreated wastewater into a watercourse and when it stops. The company publishes that signal as a public feed; WaterWatch ingests it every 15 minutes, normalises it, and surfaces it on this site so anyone can see what is happening in real time.
On the live map a red point means a site is discharging right now. Orange means it discharged in the last 48 hours. Green is not currently discharging. Grey means the sensor is offline or not reporting — which is itself useful information, because it shows where the data has gaps.
Region
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Sites monitored
Historical from
Live only