The delivery of 1 litre of tap water creates 0.25g of CO₂.
Bottled water produces around 250g of CO₂ (including production and the bottle).If the world consumes 200 billion litres of water per year that’s 80 million tonnes of greenhouse gases, or one sixth of 1% of global emissions.The table below shows how CO₂ emissions for producing drinking water are reducing, but for treating wastewater are increasing.
| Carbon impact of delivering customer service (Thames Water) | 2012/13 | 2013/14 |
|---|---|---|
| Water service - kg of CO₂ equivalent emissions per cubic metre of treated potable (drinking) water. | 293.2kg | 270.9kg |
| Wastewater Service - kg of CO₂ equivalent emissions per cubic metre of treated wastewater. | 266.1kg | 272.5kg |
