Sewage Map

How to read live monitor reports

Water companies publish recent monitor reports for their storm overflows. We check them every 15 minutes and show the latest status we hold, with its time.

What to do

Read the status together with its time. Discharging means the monitor reported a discharge at that time. Offline or unknown means there is no usable reading, not that nothing happened.

Where reports come from

Nine company feeds are published through Stream under CC BY 4.0. We check them every 15 minutes and keep the last valid copy if a feed fails our checks.

Delays and gaps

A company can take time to publish a change, and a feed can stop. Each report keeps its own time. If the time is old, treat the status as old.

No discharge does not mean clean water

A report that an overflow is not discharging says nothing about the water itself. Earlier discharges and other sources of pollution can still affect it. Check official bathing-water advice before you enter the water.

Live reports and annual counts

Annual spill counts use a counting method and go through checks. Adding up live start alerts will not reproduce them. Use the annual figures to compare outlets over a year.

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