The Water Authority engages in an ongoing effort to prevent cockroaches in its network of sanitary sewer manholes.
When a problem is identified, the Water Authority will spray manholes to address cockroaches. The product used to control the roaches is boric acid. About one pound of boric acid is sprayed into each manhole through a hole in the center of the cover. The process does not typically require lifting the cover. While boric acid is very effective in killing cockroaches, it is not toxic to humans or animals.
If you would like to request treatment for cockroaches in the sewer system in your neighborhood, please fill out and submit the form below.