River Avon: Nitrates

Environment Food and Rural Affairs written question – answered on 20th November 2007.

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Photo of John Maples John Maples Deputy Chair, Conservative Party

To ask the Secretary of State for Environment, Food and Rural Affairs what assessment he has made of the trend in the nitrate content of the River Avon in Warwickshire over the last 10 years; and what estimate he has made of the likely trend in the next 10 years.

Photo of Phil Woolas Phil Woolas Minister of State (Environment), Department for Environment, Food and Rural Affairs

Overall there are increases in nitrate concentration in the River Avon as the river flows downstream. This is not unusual in watercourses that receive treated sewage effluents and agricultural runoffs.

However, the temporal trend over the past 10 years shows a slight improvement in mean nitrate concentrations.

Due to the variability of data within and between years, it is difficult to provide an accurate forecast of future trends.

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