black worms in toilet. they seem to be coming out of the bottom of the toilet where it has a gap

1 ANSWERS

1. Guest1974
   

   The "worms" you see are the larval (maggot) stage of the black
   scavenger fly (family Sepsidae). The larvae live in excrement and various types of decaying organic materials. The adults are common flies that are often found near materials where the larvae breed. Since it is not likely the
   adult flies would have access to the contents of the commode or sewer line, I
   suspect that there may be a plumbing problem at the school. Possibly
   there is a break in the line somewhere giving the adult flies access to the
   excrement. The larvae will easily breed in the sewer sludge and will
   work their way back into the commode. As a pest control operator there is
   nothing you can do about this problem except to advise the school
   officials. You certainly can't spray any pesticides into the commodes to kill the maggots. Once it is determined where the adult flies have access to
   the sewer sludge, then they can be stopped at that point using mechanical
   controls such as repairing any breaks in the line.

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