Mosquito breeding checklist for worksites

Site: ______________________ Date: ____________ Checked by: ______________________

01Programme and people

NEA-registered vector control operator engaged, with a written scope of work. NEA ECO Code of Practice
Vector control service runs at least once a week from the start of the project. NEA ECO Code of Practice
ECO appointed where the contract sum exceeds $10 million. NEA ECO(SCS) scheme
Site zoned so each zone is checked once a week.
Upper-floor checks included in the vector control contract.

02Ground level and storage

No puddles on uneven ground. Low spots levelled or drained.
Unused containers, debris and building waste removed.
Canvas sheets checked and free of trapped water.
Materials and equipment stored under shelter or covered.
Steel casings and coring buckets stored so they cannot fill with rain.
Barriers in good condition and not holding water.

03Excavations and drains

Sump at the low point of each excavation, with a working pump.
Trenches and lift wells free of stagnant water.
Gutters and scupper drains flowing, with gratings in place.

04Upper floors, roof and structures

Every upper slab and basement checked for ponding.
Roof and roof water tanks checked.
Exposed brick holes sealed or treated with granular insecticide.
Steel struts and walers drilled or filled with sand.
Air-con units sheltered and drip trays removed or piped to a drain.

05Quarters, offices and canteen

Water drums and tanks covered or checked.
Unused sinks, toilet bowls and gully traps sealed.
Refuse bins covered and emptied daily.

06Treatment and follow-up

Anti-mosquito oil or NEA-registered larvicide applied weekly to water that cannot be removed. NEA ECO Code of Practice
Treatment repeated after heavy rain.
Every breeding find reported to the site supervisor and the cause fixed.
Workers told to report sudden fever and see a doctor early.

Legal requirement

Under Singapore's Control of Vectors and Pesticides Act, allowing conditions that let mosquitoes breed is an offence, with a fine of up to $5,000, up to 3 months' jail or both for a first offence. NEA's ECO code of practice requires occupiers of specified construction sites to engage an NEA-registered vector control operator for at least weekly service from the start of the project. NEA can also issue Stop Work Orders.

This is practical guidance, not legal advice. Laws and codes of practice change; always check the current official text and your site's own procedures.

Mosquito breeding checklist for worksites

01Programme and people

02Ground level and storage

03Excavations and drains

04Upper floors, roof and structures

05Quarters, offices and canteen

06Treatment and follow-up

Sources and further reading

Related reading

Dengue and vector control on worksites: what supervisors need to know

Toolbox talk: dengue and mosquito breeding

How to report a workplace accident in Bangladesh