What should I do if there is a rat in the sewer? - briefly
«Contact the municipal pest‑control authority and refrain from entering the sewer yourself.» «Seal any nearby entry points to block further rodent access.»
What should I do if there is a rat in the sewer? - in detail
Encountering a rodent within a municipal drainage conduit requires a systematic response to protect public health, prevent infrastructure damage, and comply with local regulations.
First, assess the situation. Verify the presence of the animal by visual inspection through an access hatch or camera inspection. Confirm that the sewer is not actively flowing, as water movement can increase the risk of disease transmission and hinder safe handling.
Second, isolate the area. Close any nearby valves or divert flow to reduce water pressure and limit the spread of contaminants. Deploy personal protective equipment (PPE) that includes waterproof gloves, a face shield, and a respirator rated for airborne pathogens.
Third, capture or remove the rodent. Acceptable methods include:
- Live‑capture traps designed for confined spaces, positioned at the sighted location and checked frequently.
- Mechanical removal tools such as grabbers attached to a flexible pole, allowing the animal to be extracted without direct contact.
If the animal is deceased, use sealed containers for disposal and follow hazardous waste protocols.
Fourth, disinfect the affected segment. Apply an EPA‑approved disinfectant to all surfaces the rodent contacted, allowing the recommended dwell time before rinsing.
Fifth, document the incident. Record the date, exact location, actions taken, and any observations of damage or disease signs. Submit the report to the responsible public works department and, if required, to health authorities.
Finally, implement preventive measures. Install rodent‑proof grates on all manholes, maintain regular cleaning schedules, and conduct periodic inspections to identify potential entry points. Coordination with pest‑control professionals ensures long‑term mitigation.