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Nitrous Oxide

Volume 460: debated on Thursday 24 May 2007

To ask the Secretary of State for Environment, Food and Rural Affairs what monitoring the Government undertake of nitrous oxide levels in water supplies in England; and if he will make a statement. (137858)

Nitrous oxide is a gas, and as such it is not monitored for in drinking water. Water companies are required by law to test for nitrate and nitrite. The Drinking Water Inspectorate publishes the results of these tests annually.