Definitions: Water Quality Parameters
Pesticides
Acetochlor:  A selective pre-emergent soybean herbicide in the chloracetanilide family.  Measured in µg/L or ppb.  Harness is one of the product names. 
Alachlor:  A common herbicide that is in the acetanilide family.  Measured in µg/L or ppb.  The MCL for alachlor is 2 µg/L or ppb.   Lasso is one of the product names. 
Ametryn:  A selective herbicide for use in controlling most annual broadleaf and grassy weeds.  Ametryn is in the triazine family.  Measured in µg/L or ppb.   
Atrazine:  A common corn herbicide that is in the triazine family of herbicides.  Measured in µg/L or ppb.  The MCL for atrazine is 3 µg/L or ppb.  Atrazine is the most commonly detected pesticide in Iowa's surface waters and groundwater.
Butylate:  A selective herbicide used for grassy weeds.  Measured in µg/L or ppb.  Sutan is one of the product names.
Cyanazine:   A common corn herbicide that is in the triazine family of herbicides.  Cyanazine is being phased out of production by 2001.  Cyanazine has a  Health Advisory Level of 1 µg/L or ppb.  Measured in µg/L or ppb.  Bladex is one of the product names.
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