Mitigation

Simple steps to minimise the effects of chemical contamination on water quality and mahinga kai.

• Use low-toxicity herbicides adjacent to waterways.
• Minimise the need for pesticide applications by applying them only when needed, at times when they are most likely to be effective, and in recommended concentrations.
• Use, wherever possible, new-generation chemicals that have a high degree of target specificity, have low persistence in the environment, and are less inclined to be leached to groundwater or carried in surface runoff.
• Apply chemicals in conditions and with equipment that prevent spray drift and coverage of non-target plants and waterways.
• Avoid applying chemicals immediately prior to rain.
• Investigate alternative methods to the use of herbicides for the control of weeds and unwanted grass.
• Reduce contaminants from entering waterways by planting riparian margins and maintaining and incorporating vegetated swales and constructed wetlands.
• Contain wastewaters carrying chemical preservatives as part of wood treatment within a closed loop application system.
• Prevent leaching of contaminated waters into the soil and groundwater.
• Line and waterproof storage areas and treatment areas (including agri-chemicals, timber processing yards, and meat and dairy processing facilities).
• Recycle chemicals.

You can find out about industry or land use specific mitigation options on the corresponding activity or industry page