Do not drain effluent into road gutters or waterways

About river in Yokohama-shi, it becomes good water quality by public sewer became widespread.
However, water pollution accidents such as cloudy water and oil flow are frequently occurring.
Investigations have revealed that residual paints and brush-washing water into road gutters, rainwater masu, and waterways at the site of building renovation and construction sites.
If waste liquid is drained into road gutters or rainwater masu, it will flow directly into the river.
In order to maintain a good water environment, we ask for your cooperation so that waste liquids do not flow into road gutters or rainwater masu, but to properly discharge it as industrial waste or sewage.

Green Environment Bureau, Frequently Asked Complaints and Consultation <Water Pollution>

• Paints and oil flow while adhering to plants on river banks and water, contaminate rivers and seas.
• It can flow into paddy fields and affect crops.
• It can kill fish and shellfish in rivers and seas and cause destruction of nature.

• Gutters and rainwater masu on the road are used to release rain that has fallen into rivers and the sea.
  When drainage such as paint and oil is drained into gutters or rainwater masu, it flows directly into rivers and the sea.

Road gutter

Road gutter

Rainwater masu

Rainwater masu

Waterway

Waterway

• Use up paint and oil without leaving waste liquid.
• Remaining paint residue and sewage after washing the brush should be treated properly by soaking it into used cloth.
• Perform daily inspections and safety checks to prevent oil spills due to deterioration of equipment, construction equipment, pipelines, etc.

Whitewater pollution of rivers

Whitewater pollution of rivers

White turbidity in paddy fields

• Izumi Ward has adopted a "separate sewer system" that separates rainwater and sewage.
  In the "split sewer system", rainwater flows directly into rivers and seas without passing through a sewage treatment plant.
  Therefore, if paints, oils, chemicals, domestic wastewater, etc. are drained into road gutters or rainwater masu, they may flow directly through rainwater pipes and flow directly into rivers and sea areas, which may have a major impact.
• Domestic wastewater used in kitchens, baths, washrooms, toilets, etc. flows into underground sewage pipes, purified at a water reclamation center (sewage treatment plant), and then released into rivers and the sea.

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In the unlikely event of a water pollution accident, take immediate measures to prevent the spread of pollution and contact Public Works Office.