The National Pesticides and Drinking Water Action Group (NPDWAG) has urged all users of pesticides to remain vigilant as the spraying window comes to a close.

The group is reminding all pesticide users that the actions they take now can help protect drinking water supplies for the communities that depend on them.

Since the establishment of the group in 2017, pesticide exceedances have reduced by more than 50%. The group warns, however, that continued vigilance remains essential, particularly during the autumn months, when wetter conditions can increase the risks of pesticides entering water sources.

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Dr Aidan Moody of the Department of Agriculture and chair of group said: “We urge everyone to continue the great work and always consider whether a pesticide is needed at all and, where it is, to make sure the best practices are followed. This approach not only protects our drinking water but also supports biodiversity and healthy ecosystems.”

Dangers outside of spraying season

Dr Patrick O’Sullivan of Uisce Éireann stressed that pesticide exceedances can still occur outside the main spraying season.

"Experience shows that pesticide exceedances can still occur outside the main spraying season, particularly during the autumn months," he said.

"These detections reinforce a simple message: it only takes one drop of pesticide to impact a water source. By following best practice and taking extra care near watercourses, pesticide users can help protect drinking water and build on the significant progress achieved in recent years.”

Key messages

The group also outlined key messages for pesticide users.

  • Only use pesticides when necessary and after considering all alternative control methods.
  • Always read and follow the product label.
  • MCPA products are not allowed to be used from the end of September (or the end of October, depending on the particular product) through to the beginning of March.
  • Do not use pesticides if rain is forecast in the next 48 hours.
  • Keep well clear of watercourses, drains, wells and springs, and observe the correct no-spray buffer zones.
  • Avoid spills. Never fill or wash sprayers beside drains or on concrete where run-off can occur, and triple-rinse containers into the sprayer.
  • Dispose of unused product and containers safely.
  • Never fill a sprayer directly from a watercourse.