The most common way homeowners dispose of leftover pesticides is
to dump them down the toilet or sink. This places a serious burden
on your municipality’s water-treatment facilities; if a home
is connected to a septic system, pesticides can interfere with the
system’s proper operation.
Although toxicity varies from one pesticide to the next, all pesticides
should be treated with caution. Take special care when disposing
of:
leftover pesticide concentrate
leftover pesticide mix
rinse water used to clean the sprayer after application
rinse water used to clean empty pesticide containers
empty pesticide containers.
If
you end up with excess pesticide concentrate, dilute it as directed
on the label; then apply it to an area listed on the label. You can
dispose of excess pesticide mix by applying it to an area listed on
the label. Do not apply more than is recommended. You can also store
leftover pesticide until you are able to take it to a hazardous-waste
collection site.
An
empty pesticide container is not as empty as you might think; a significant
amount of pesticide residue can remain inside of it. Triple-rinse
an empty container of liquid pesticide before you toss it into the
trash. Here’s how: First, when you are down to the last amount
of pesticide concentrate, drain the pesticide container into your
spray tank for at least 30 seconds.
Fill
the empty container one-fifth to one-fourth full of water and rinse
thoroughly. Use this rinse water as dilution water for the pesticide
concentrate in the sprayer. If the dilution rate allows you to pour
all the rinse water into the sprayer, drain it into the sprayer for
at least 30 seconds.
Follow
the procedure in Steps 2 and 3 two more times. Then spray the pesticide
mixture on areas listed on the label. Do not exceed the label’s
application rate.
Triple-rinse
containers as soon as they are emptied during the mixing/filling stage.
If you still have some rinse water left over after using it to dilute
pesticide concentrate, spray it on areas listed on the label. You
can do the same with rinse water used to clean the sprayer.