Gross Pollutant Traps (GPTs)
GPT are filters that catch stormwater pollution before it has a chance to enter waterways. GPTs catch most of the litter and silt but donít stop chemicals going into the environment. The contents of the GPTs are emptied on a regular basis and sent to landfill.

What are gross pollutants?

Items classed as gross pollutants are:
- Domestic plastics (plastic bags, clingwrap etc)
- Industrial packaging
- Metals (aluminium)
- Plastic bottles Paper (including) cigarette butts
- Sediments
- Organics (grass and garden clippings etc)

How this issue affects you
By trapping the majority of solid stormwater pollution, GPTs aid in enhancing the aesthetic qualities of the Hawkesbury environment. If areas are free of gross pollutants it is possible to enjoy recreational activities such as swimming, boating and waterskiing.

How this issue affects the environment
Stormwater pollution can kill plants and animals that live in the water. For example: Sediment in the water reduces light penetration and affects photosynthesis, the process that allows plants to use light as their source of energy When green waste decays in water it uses up oxygen, taking vital oxygen away from plants, fish and other aquatic animals Soil makes waterways cloudy and can suffocate fish by clogging their gills Litter clogs waterways and causes toxicity as it breaks down. It affects the health of birds, fish and other animals and plants that live in the waterways

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