In case you're wondering: mg/Kg is the same as ppm (parts per
million). I'm assuming those tests would be done on dry leaves. If you
made a tea infusion, the residual amounts of pesticides should be
less.

Also, since July, 2003, the EU set limits for pesticide residues in
tea at 0.01 ppm (or 0.01 mg/Kg). It was a much more stringent standard
than what was in in place in China. As a result, some teas for export
did not meet that standard. So that left tea producers who rely on tea
exports to meet the standard.

The 2005 standards above are for tea sales inside Mainland China. Now,
the government and tea prodcuers are working hard to meet the more
stringent standards, like those of the EU. So things can only get
better.