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Laundering Contaminated Clothing

LAUNDERING PESTICIDE CONTAMINATED CLOTHING

by

Carol Bryan Easley, Joan Laughlin, and Roger Gold
University of Nebraska - Lincoln

The problem of how to launder pesticide contaminated clothing has puzzled many as pesticide use has become widespread. What is the best method? What water temperature should be used? Is there a difference in detergent performance? Must you be careful about washing contaminated clothes with other clothing?

Use the pesticide label as a guide for knowing which chemicals are more toxic. Key words on all pesticides labels identify the toxicity of the product (Figure 1).

Figure 1:

  Key Word              Toxicity                    Examples*
------------------------------------------------------------------
  Danger                Highly toxic/               Counter
  Poison                  concentrated              Disyston
                                                    Parathion
                                                    Furadan
                                                    Dyfonate
  Warning                Moderately toxic           Diazinon
                                                    Treflan
                                                    Chlorodane
  Caution                Slightly toxic             2,4-D
                                                    Sevin
                                                    Altrazine
                                                    Malathion
___________________________________________________________________
  *Toxicity of the pesticide may vary depending upon the formulated
product.  Use the key word as an indication of the toxicity level.

Clothing contaminated with highly toxic and concentrated pesticides must be handled most carefully as these pesticides are easily absorbed through the skin. If the clothes have been completely saturated with concentrated pesticides, discard them. Clothing contaminated by mod- erately toxic pesticides do not warrant such drastic measures. Hazards are less pronounced in handling clothing exposed to low toxicity pesticides. But...the ease of pesticide removal through laundering does not depend on toxicity level--it depends on the formulation of the pesticide. For example, 2,4-D amine is easily removed through laundering because it is soluble in water, 2,4-D ester is much more difficult to remove through laun- dering.

Disposable clothing helps limit contamination of clothes because the disposable garments add an extra layer of protection. This is especially im- portant when you are in direct contact with pesticides, such as when mixing and loading pesticides for application.

Laundering Recommendations

Wash contaminated clothing separately from the family wash. Research has shown that pesticide residues are transferred from contaminated clothing to other clothing when they are laundered together. Know when pesticides have been used so all clothing can be properly laundered!

Pre-rinsing contaminated clothing before washing will help remove pes- ticide particles from the fabric. Pre-rinsing can be done by:

  1. pre-soaking in a suitable container prior to washing
  2. pre-rinsing with agitation in an automatic washing machine
  3. spraying/hosing garment(s) outdoors

Pre-rinsing is especially effective in dislodging the particles from clothing when a wettable powder pesticide formulation has been used.

Clothing worn while using slightly toxic pesticides may be effectively laundered in one machine washing. It is strongly recommended that multiple washings be used on clothing contaminated with concentrated pesticides to draw out excess residues. Always wear rubber gloves when handling highly contaminated clothing to prevent pesticide absorption into the body.

Washing in hot water removes more pesticide from the clothing than washing in other water temperatures. Remember...the hotter, the better. Avoid cold water washing! Although cold water washing might save energy, cold water temperatures are relatively ineffective in removing pesticides from clothing.

Laundry detergents, whether phosphate, carbonate, or heavy duty liquids, are similarly effective in removing pesticides from fabric. However, re- search has shown that heavy duty liquid detergents are more effective than other detergents in removing emulsifiable concentrate pesticide formulations. Emulsifiable concentrate formulations are oil-based and heavy duty liquid detergents are known for oil-removing ability.

Laundry additives, such as bleach or ammonia, do not contribute to re- moving pesticide residues. Either of these additives may be used, if desired, but caution must be used. Bleach should never be added to or mixed with ammonia, because they react together to form a fatal chlorine gas. Be careful--don't mix ammonia and bleach!

If several garments have been contaminated, wash only one or two garments in a single load. Wash garments contaminated by the same pesticide(s) together. Launder, using a full water level to allow the water to thoroughly flush the fabric.

During seasons when pesticides are being used daily, clothing exposed to pesticides should be laundered daily. This is especially true with highly toxic or concentrated pesticides. It is much easier to remove pesticides from clothing by daily laundering than attempting to remove residues that have accumulated over a period of time.

Pesticide carry-over to subsequent laundry loads is possible because the washing machine is likely to retain residues which are then released in following laundry loads. It is important to rinse the washing machine with an empty load, using hot water and the same detergent, machine settings and cycles used for laundering the contaminated clothing.

Line Drying is recommended for these items. Although heat from an auto- matic dryer might create additional chemical breakdown of pesticide residues, many pesticides break down when exposed to sunlight. This also eliminates the possibility of residues collecting in the dryer.

When Laundering Pesticide Contaminated Clothing.....REMEMBER

  • READ the pesticide LABEL for information
  • DISPOSABLE PESTICIDE CLOTHING provides extra protection
  • PRE-RINSE clothing by:
    • presoaking in a suitable container
    • agitating in an automatic washing machine
    • spraying/hosing the garment(s) outdoors
  • WASHING machine settings: Hot water temperature (140 degrees F/ 60 degrees C), full water level, normal (12 minutes) wash cycle.
  • RE-WASH the contaminated clothing two or three times, if necessary
  • Wash A FEW contaminated garments at a time, using lots of water
  • Wash SEPARATELY from FAMILY laundry. DISCARD clothing if thoroughly saturated.
  • LAUNDER CLOTHING DAILY when applying pesticide daily
  • RINSE MACHINE thoroughly after laundering contaminated clothing
  • LINE DRY to avoid contaminating the automatic dryer
  • BE AWARE of when pesticides are being used so that clothing can be appropriately laundered.

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