Drains are underground pipes that take water away from houses and buildings. Most homes have separate drains for rainwater and wastewater. The owner is responsible for checking their property has the right drain connections. If your property has the wrong drain connections, you could be causing water pollution.
Drain for rainwater
This drain collects rainwater from:
Rainwater is untreated. It's also described as 'storm water'. The surface water drain takes it directly to rivers and beaches.
Drain for wastewater
Wastewater comes from:
- toilets
- sinks
- baths and showers
- washing machines
- dishwashers
This drain takes the foul water to the local wastewater treatment works.
If wastewater from your home flows into the rainwater drain, this takes untreated water to the nearest river. This pollutes:
- river water
- the sea
- local beaches
https://www.nidirect.gov.uk/articles/connecting-your-home-right-drains
People thinking that dumping grey water over a gully or on the road is fine are WRONG. they will be polluting.
There is a reason why in camping sites there are grey water disposal areas rather than just road gullies.