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WAgriCo An Opportunity for Improving Drinking Water Quality

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Presentation on theme: "WAgriCo An Opportunity for Improving Drinking Water Quality"— Presentation transcript:

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2 WAgriCo An Opportunity for Improving Drinking Water Quality
Luke de Vial Water Resources Manager Wessex Water

3 Impact of diffuse pollution
Solutions Examples of catchment management Pesticides Empool WAgriCo The new three nitrate sites

4 Trends

5 New sources affected by poor water quality by 2010

6 New sources affected by poor water quality by 2015

7 Solutions Blend Treat Solve the problem at source – catchment management

8 Blending

9 Blending

10 Ion Exchange

11 GAC (at Fovant WTW)

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13 Catchment management Solves the problem at source
Public water supply and the environment More sustainable Lower cost

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15 Pesticides Ulwell Friar Waddon

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17 Ulwell

18 Ulwell Location of sheep dip

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23 Treated Water Quality

24 Chlortoluron October/November 2002

25 Isoproturon - November 2003

26 Metazachlor September 2004

27 Friar Waddon Discussions with DWI and farmers Agreement
No spraying pesticides for a 3 year trial Contribute to improving his batching facility Contribute to a weed-wipe system for a neighboring farmer

28 Picture of new barn

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30 Empool Rising nitrate levels

31 Sampling, water and soils
Catchment adviser Nikki Downton Empool Nitrates Five year project Work programme Sampling, water and soils Contact with farmers Agronomic advice Farm management plans Modeling

32 Results Too early

33 Preliminary map of nitrate concentration distribution
EMPOOL CATCHMENT AREA 48 52 42 25 TERTIARY DEPOSITS 87 EMPOOL SOURCE 40 71 < 1 39 56 41 51 36 45 2 km 155

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35 Three new sites Deans Farm near Salisbury
Winterbourne Abbas, Eagle Lodge near Dorchester New Wessex catchment adviser, who is Harry Wheeler

36 Conclusions Catchment management is the best solution to water quality problems To achieve it: Start as soon as possible – to meet drinking water regulation requirements Be site specific Be detailed Involve significant changes to land management Offer something to the farmers


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