Here are just a few more articles that show how toxic all this run-off from your chemicals is since you can't seem to acknowledge scientific data in your responses.
Although the pyrethroid levels were low -- around 10-20 parts per trillion -- they were high enough to kill a test organism similar to a small shrimp that is used to assess water safety.
"These indicator organisms are 'lab rat' species that are very sensitive, but if you find something that is toxic to them, it should be a red flag that there could be potential toxicity to resident organisms in the stream," said study leader Donald P. Weston, UC Berkeley adjunct professor of integrative biology.
http://www.sciencedaily.com/releases/2010/02/100202151051.htm
II. Effects of Pesticides on Human Health
Pesticides can be classified based on the target groups on which they are designed to act
such as into insecticides, herbicides, fungicides and others, or based on their chemical
nature such as organochlorines, organophosphates, carbamates and synthetic pyrethroids,
for example. Organochlorines and synthetic pyrethroids are stomach and contact poisons,
while organophosphates and carbamates target the nervous system of insects and also
affect humans because of the similarity between humans and insects in nerve impulse
transmission. Both organophosphates and carbamates are inhibitors of the enzyme acetyl
cholinesterase leading to accumulation of acetylcholine in the nerve synapses thereby
preventing synaptic transmission of nerve impulses. Organochlorines and synthetic
pyrethroids, on the other hand, attack individual nerves, impairing the transmission of
impulses (Solomon et al ., 2000; EJF, 2003). The three major routes of pesticide exposure
are oral ingestion, dermal absorption and inhalation. The route may vary from pesticide
to pesticide. For instance, dichlorvos (DDVP) being volatile is likely to be inhaled;
endosulfan can be easily absorbed on the skin; while chlorpyrifos is more likely to be
taken through ingestion or inhalation (EJF, 2003). When pesticides are used in
agricultural fields, homes, lawns and gardens, people other than the sprayers also get
exposed [The Ontario College of Family Physicians (OCFP), 2004]. Pesticides, among
other chemicals also act as hormone-disruptors. They have a chemical structure similar to
that of many hormones, thereby interfering with their function and causing many
developmental and reproductive abnormalities (Buranatrevedh and Roy, 2001-reviewed
in EJF, 2003)
The numerous primary epidemiological studies and reviews published till date have been
able to establish the cause-effect relationship between pesticides and a large number of
diseases. These include solid malignant tumours in lung, kidney, pancreas, breast, brain
and prostate.
http://www.academia.edu/1001825/Imp...m_Health_Scientific_Ethical_and_Policy_Issues
http://www.fao.org/docrep/w2598e/w2598e07.htm
http://www.hindawi.com/isrn/toxicology/2012/247072/
http://www.beyondpesticides.org/lawn/factsheets/facts&figures.php