The city has eliminated or reduced most pesticide applications. Pesticides can harm human health, contaminate waterways, hurt non-target organisms and damage ecosystems.

Why avoid pesticides?

Pesticide is a general term that includes insecticides, herbicides, fungicides, rodenticides or any substance or mixture of substances that can kill, repel, or interfere with a target organism. Long-time city policy aims to reduce and eliminate the use of pesticides. Why?

Pesticides are chemicals that are intentionally designed to harm organisms and are purposely released into the environment for that purpose. In most pesticide applications, the majority of the pesticide never reaches the target pest, but instead travels into the air, water and soil where non-target organisms are exposed. People try to create a silver bullet that will only kill or harm the target, but pesticides almost always interfere with the physiology and/or behavior of other living organisms - through the same pathways used for the pest, e.g. most insecticides have broad-spectrum action since animals, including humans, share the same type of nerve cells and neurotransmitters with insects. Or sometimes a pesticide can interfere with a physiological pathway that is completely different than the mode of action for the intended pest.

Pesticides have been shown repeatedly to adversely impact soil, freshwater ecosystems, amphibians, insects, birds, coral reefs, coral fish, marine mammals, etc. The regulatory process is not adequate to appropriately estimate the ecological risk from pesticides. As the EPA phased out the use of problematic pesticide groups like the organophosphates and carbamates, newer pesticide groups like the neonicotinoids and pyrethroids have increased the toxic load of agricultural lands by 50-fold. These newer products that were intended to be safer have contributed to catastrophic insect and wildlife declines.

Not only do pesticides directly harm organisms, but through both direct and indirect effects, entire ecosystems are impacted. As biodiversity continues to decline from multiple stressors, the worlds’ academies of science are calling on world leaders to take urgent action to reverse these trends.

Pesticide impacts on human health

Pesticides are associated with multiple human health issues. Developmental windows during gestation are particularly vulnerable times for pesticide exposure and can lead to birth defects. Pesticide exposure in children is linked to cancer and cognitive disorders like autism and ADHD. Pesticide exposure in adults is associated with reproductive disorders.

We’re exposed to pesticides and dozens of other synthetic chemicals in daily settings. Eliminating these chemicals in our homes, schools and workplaces and transitioning our food system to regenerative agriculture will protect our health and help reverse declining biodiversity.

Pesticide use on city property

Turf grass on city properties, including athletic fields, has been managed without pesticides (herbicides, fungicides and insecticides) since 2002. Landscaped areas of parks and medians are also pesticide-free.

Almost all pesticides are banned on city property, including the neonicotinoids and glyphosate (active ingredient of Roundup). Before a pesticide can be considered for use, it must be assessed with a review of the regulatory data and peer-reviewed literature. The results are run through hazard criteria and categorized. Any pesticide use has to be justified. Before city staff can consider applying a pesticide, they must use the city’s Integrated Pest Management decision process and show that non-chemical methods are not feasible and that the undesired organism has exceeded a threshold.

Notification of Pesticide Applications

City staff are required to notify the public of any pesticide application on city property. This dashboard is updated weekly to provide information about the location, product, application method and target pest.