"brojack" wrote in message
...


What I really need to know is its effect on ground water.

Jack

Water:
Solubility: Glyphosate dissolves easily in water.
Potential For Leaching Into Ground-Water: The potential for leaching is low.
Glyphosate and the surfactant in Roundup are strongly adsorbed to soil
particles. Tests show that the half-life for glyphosate in water ranges from
35 to 63 days. The surfactant half-life ranges from 3 to 4 weeks.
Surface Waters: Studies examined glyphosate and aminomethylphosphonic acid
(AMPA) residues in surface water after forest application in British
Columbia with and without no-spray streamside zones. With a no-spray
streamside zone, very low concentrations were sometimes found in water and
sediment after the first heavy rain. Where glyphosate was sprayed over the
stream, higher peak concentrations in water always occurred following heavy
rain, up to 3 weeks after application. Glyphosate and AMPA residues peaked
later in stream sediments, where they persisted for over 1 year. These
residues were not easily released back into the water.

There are plenty of other peer-reviewed studies on glyphosate's effects on
water......