Updated July 13, 2023
Cockroach infestations reported
Our wastewater division has been receiving reports about cockroach infestations. While they are often called "sewer roaches," this is a misnomer. However, our sewer system does provide an ideal environment for cockroaches due to its damp and dark conditions.
Cockroaches are highly adaptable pests and can thrive in various settings, both indoors and outdoors. While cockroaches may take temporary shelter in our sewer pipes, they are unlikely to enter homes from our pipes if customers' indoor plumbing is regularly used and properly maintained.
Upon receiving calls regarding cockroaches in the sewer system, we:
• Dispatch our service workers to assess the situation
• Conduct thorough inspections of upstream and downstream manholes and customers' clean-out and lateral lines
• Perform pest control spraying on manholes and clean out using a product that is one of the least toxic options available, following the instructions on the product label if we find that there are cockroaches
We do not spray on the resident side and encourage customers to contact a pest control company or use a suitable product available at home improvement stores for their residences.
As part of our preventive measures, to date, we have coated 1,740 out of more than 12,000 manholes with paint mixed with an insecticide. This coating serves to prevent insects from emerging out of the sewer manholes.
During hot weather, cockroaches tend to be more active. So, we suggest customers seal cracks and crevices in their homes and maintain a clean yard by trimming brushes and addressing potential hiding spots.
The Environmental Utilities wastewater division has implemented a proactive maintenance program to ensure the proper functioning of sewer pipes. If you have any problems, please call us at (916) 774-5750 anytime.