§ Mr. Teddy Taylorasked the Secretary of State for the Environment on how many occasions water authorities notified medical officers that th 50 mg per litre nitrate level in public water supplies was exceeded in the most recent annual period for which figures are available; and if he will provide a separate figure for such notifications in Essex.
§ Mr. Giles ShawIndividual water authorities are responsible for notifying medical officers in their areas when nitrate levels in water supplies exceed guideline levels.
No central record is kept, but officials have asked the four water undertakers supplying Essex, and they say that medical officers were notified of two water supplies, where at some time during 1982, nitrate levels exceed 50 mg per litre.