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Disposal guidelines presented in this publication are restricted
to "home use" pesticides commonly applied in and around
residential dwellings by unlicensed pesticide users.
Home and apartment dwellers who practice do-it-yourself pest
control are confronted with chemical disposal problems because
they often purchase much more pesticide than they can use in
a reasonable period of time. This often results in the accumulation
of partially filled pesticide containers and speculation about
how best to dispose of these chemicals.
Although pesticides are poisons designed to kill pest organisms,
they are sold to the public in formulations that are minimally
hazardous to the user. In fact, most people buy their pesticides
in supermarkets; however, pesticides are hazardous chemicals
requiring proper disposal. Safe and legal disposal of pesticides
may be accomplished by adhering to the following guidelines:
- Avoid disposal problems by purchasing only as much chemical
as may realistically be used within two years. However, please
be advised that if the product container is tightly sealed and
has been stored in cool, dark conditions, the pesticide will
most likely retain its potency for many years.
- Dispose of unused pesticides by using them per label directions.
Immediately upon application, sunlight, soil micro-organisms,
and various chemical processes begin to destroy (degrade) these
chemicals. Degradation of properly applied pesticides is relatively
rapid and very important in preventing long-term environmental
contamination.
- If you determine that a pesticide is unusable and you need
advice about proper disposal, contact your county health office
regarding their disposal policies and programs. Many counties
and municipalities periodically conduct household hazardous waste
collection programs (supported by local taxes) that assure proper
disposal for these chemicals.
- Never dispose of any hazardous chemical by flushing it down
the drain or toilet. Contamination of any waterway (including
a sewage system) is illegal and potentially damaging to aquatic
plants and animals.
- Before disposing of any "empty" pesticide container,
remove as much of the product as possible. Dry pesticide formulations
often come in paper or cardboard containers. Dispose of these
containers in the garbage after a thorough shaking/patting. Dispose
of liquid pesticide containers after pesticide residues have
been removed by rinsing the container with water at least three
times. Dispose of the rinsate by adding it to the sprayer and
applying it per label directions.
- Do not place pesticide containers in kitchen garbage compactors
or attempt to burn them in a home fireplace, woodstove, or "burn
barrel." Dispose of all empty pesticide containers (including
aerosol containers) by placing them in the garbage for shipment
to a sanitary landfill.
College of Agriculture and Home Economics, Pullman,
Washington. Issued by Washington State University Cooperative
Extension and the U.S. Department of Agriculture in furtherance
of the Acts of May 8 and June 30, 1914. Cooperative Extension
programs and policies are consistent with federal and state laws
and regulations on nondiscrimination regarding race, color, gender,
national origin, religion, age, disability, and sexual orientation.
Evidence of noncompliance may be reported through your local
Cooperative Extension office. Trade names have been used to simplify
information; no endorsement is intended. Revised August 1994.
Reprinted June 1995. Subject code 355. A
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