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Metaldehyde and PES in the Ampney Brook Catchment (Daryl Henehan)
Metaldehyde and PES in the Ampney Brook Catchment (Daryl Henehan)
Metaldehyde and PES in the Ampney Brook Catchment (Daryl Henehan)
Metaldehyde and PES in the Ampney Brook Catchment (Daryl Henehan)
Metaldehyde and PES in the Ampney Brook Catchment (Daryl Henehan)
Metaldehyde and PES in the Ampney Brook Catchment (Daryl Henehan)
Metaldehyde and PES in the Ampney Brook Catchment (Daryl Henehan)
Metaldehyde and PES in the Ampney Brook Catchment (Daryl Henehan)
Metaldehyde and PES in the Ampney Brook Catchment (Daryl Henehan)
Metaldehyde and PES in the Ampney Brook Catchment (Daryl Henehan)
Metaldehyde and PES in the Ampney Brook Catchment (Daryl Henehan)
Metaldehyde and PES in the Ampney Brook Catchment (Daryl Henehan)
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Metaldehyde and PES in the Ampney Brook Catchment (Daryl Henehan)

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  • 1. Metaldehyde and PES in the Ampney Brook Catchment July 2013 Daryl Henehan Catchment Adviser
  • 2. 2 Overview  Drinking water quality  Why is metaldehyde a problem?  Possible solutions  What would we like from this trial?  What we need to know today  Next steps  Questions?
  • 3. 3 Drinking water quality  EU and UK Drinking Water Regulations  Standards for a number of chemicals, including: – Pesticides 0.1µg/l – ‘Total’ pesticides 0.5µg/l
  • 4. 4 The metaldehyde problem  0.1 µg/l standard applies metaldehyde  Legal requirement for water companies  Metaldehyde is routinely found in many water sources at levels above 0.1 µg/l  Not removed by conventional water treatment  Additional treatment is extremely expensive and energy intensive  What else could we do to solve this problem?
  • 5. 5 The metaldehyde problem – Upper Thames
  • 6. The metaldehyde problem – Farmoor Water Treatment Works 6
  • 7. 7 Possible solutions  Catchment Management  Working with pesticide users to raise awareness and encouraging best practice  Thames Water is trialling a variety of projects throughout the River Thames catchment  PES is a form of catchment management – paying pesticide users to go beyond best practice  Also trialling abstraction management at Farmoor WTW later this year
  • 8. 8
  • 9. 9 What would we like from this trial?  Investigate the effect of different land management practices on metaldehyde use  Find out what farmers would need to enable them to take part in PES schemes in the future  To monitor metaldehyde concentrations associated with the different land management practices
  • 10. 10 What we need to know today  Are you interested in participating in this trial?  Information on land management practices  Are you willing to be involved in a sampling programme?  Can you see any potential problems with this approach?  Are you willing to support our abstraction management trial by telling us when you have applied metaldehyde this autumn?
  • 11. 11 Next steps  Determine sampling programme – Appropriate sample points – Weekly samples – Communicate results to participants or individuals
  • 12. 12

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