The Regional Water Authority (the Authority) is required to test for over 120 constituents (substances) to make sure that the water you drink is safe.
(The Regional Water Authority; is required; to test for over 120 constituents (substances) to make sure that the water you drink is safe) (The Regional Water Authority; to test; to make sure that the water you drink is safe) (the water; drink; you) (the water you drink; is; safe)
The Regional Water Authority The Regional Water Authority the water the water you drink
is required to test drink is
to test for over 120 constituents (substances) to make sure that the water you drink is safe
to make sure that the water you drink is safe
you
safe