Groundwater is not only affected by commercial and industrial activity, the actions of the average homeowner can lead to groundwater contamination as well. Plainview Water District Commissioners Kevin Langberg, Edward Shulroff and Joel Kessler explain how pesticides and fertilizers can have a detrimental impact on our water supply when improperly used and how people can take measures to prevent this.

Proper selection, storage and use of garden products are the primary measures that can be taken to prevent contamination. "Homeowners should always apply a minimum amount of pesticides and fertilizers in accordance with the manufacturer's label instructions. This will reduce the amount to eventually be disposed of," stated Commissioner Langberg. He also suggests that when applying these chemicals, homeowners become familiar with the product to determine the impact of use. "Always ask yourself the question, 'is the product suitable for the application?' and always follow the label directions for use and disposal. Look for alternative 'non' or less hazardous products for performing the job before applying chemicals," Commissioner Langberg commented.

Consumers should use organic fertilizer and biodegradable insecticides and fungicides to prevent and/or avoid pollution. Organic fertilizers are good because they break down slowly and release small quantities of nitrates. Cotton seed meal, bone meal and manure are examples of organic fertilizer. Biodegradable chemicals break down into harmless substances in 2 to 21 days depending upon chemical composition.

In addition to properly selecting products, it is crucial that spills be quickly contained, cleaned (or neutralized) and properly disposed of. Chemicals should be kept in well ventilated cool and dry locations and be sealed in clearly labeled original leak-proof containers.

By carrying out these measures and using good common sense, homeowners can safely use fertilizers and lawn chemicals without adversely impacting the environment and our precious groundwater supply. For more information on "environmentally friendly" lawn care options residents should call the Cornell Cooperative Extensions of Nassau County at 292-7990.