One in four construction sites in the East of England are not as safe as they could be.
Inspectors from the Health and Safety Executive (HSE) visited 71 sites during a month-long inspection, 17 of which failed to meet the minimum safety requirements.
Eighteen enforcement notices were issued as a result including six Prohibition Notices.
Dominic Elliss, HSE principal inspector for construction in the East of England, said, "Poorly erected scaffolding, exposure to dangerous types of dust and inadequate washing facilities were among the poor standards we found on some sites.
"I hope by carrying out these spot checks we will help to raise awareness of the dangers and reduce the number of construction workers being killed or seriously injured at work."
During 2011/12, 19 workers were killed while working in construction across the East of England and a further 2,141 were seriously injured.
A statement from the HSE said that the purpose of the initiative is to remind those working in the sector that poor standards are unacceptable and could result in enforcement action.
By Kirsty Hewitt