Do not drain wastewater into road gutters or waterways.

About river in Yokohama-shi, it becomes good water quality by the spread of public sewer.
However, water pollution accidents such as turbid water and oil flow often occur.
Investigations have occurred when paint residues and brush washing water flow into road gutters, rainwater masu, and waterways at the site of building renovation and construction.
If waste liquid flows 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 are not drained into road gutters or rainwater masu, etc. properly discharged as industrial waste or sewage.

Green Environment Bureau Frequently Complaints and Consultations <Water Pollution>

• Paints and oils flow while adhering to riverbanks and waterside plants, pollute rivers and seas.
• It can flow into paddy fields and affect crops.
• It can kill fish and shellfish in rivers and seas and cause natural destruction.

• Gutters and rainwater masu on the road are used to release rain falling into rivers and the sea.
  When draining paints and oils into gutters and rainwater masu, it flows directly into rivers and the sea.

Road gutters

Road gutters

Rainwater

Rainwater

Waterways

Waterways

• Use up paints and oils so that waste fluid does not come out.
• Sewage after washing the remaining paint and brushes should be properly treated by soaking it into used cloth.
• Perform daily inspections and safety checks to prevent oil spills due to deterioration of equipment, construction machinery, and pipelines.

River turbidity

River turbidity

White turbidity in paddy fields

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

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