Having your tap water tested can tell you the purity and content of your water - but you are better off sending it to an independent lab rather than a company that sells filters or water.
(a company; sells; filters or water) (Having your tap water tested; can tell; you; the purity and content of your water) (you; are; better off sending it to an independent lab rather than a company) (you; sending; it; to an independent lab rather than a company)
a company Having your tap water tested you you
sells can tell are sending
filters or water
you the purity and content of your water
better off sending it to an independent lab rather than a company
it to an independent lab rather than a company