I agree pouring coffee into a bin was bad advice, but pouring coffee into the gutters is also wrong. She should have taken it with her and poured it down a sink or toilet.
There are two drainage systems under the roads. One is the clean surface water drainage which is designed to take rain water quickly and freely to nearby rivers and water courses - that is where she poured her waste water. The sewage system is separate and is for foul water - that is what sinks, toilets etc drain into - and should drain to sewage treatment plants to be cleaned.
The gutters on the sides of the side of streets do not connect with the sewers, so people should not be pouring contaminated water down them. It’s basically the same as just pouring coffee directly into the river or a lake.
I agree pouring coffee into a bin was bad advice, but pouring coffee into the gutters is also wrong. She should have taken it with her and poured it down a sink or toilet.
There are two drainage systems under the roads. One is the clean surface water drainage which is designed to take rain water quickly and freely to nearby rivers and water courses - that is where she poured her waste water. The sewage system is separate and is for foul water - that is what sinks, toilets etc drain into - and should drain to sewage treatment plants to be cleaned.
The gutters on the sides of the side of streets do not connect with the sewers, so people should not be pouring contaminated water down them. It’s basically the same as just pouring coffee directly into the river or a lake.
I understand that
How is coffee is going to “contaminate” the run-off from the roads that’s full of hydrocarbons, rubber from tyres and everything else?