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
