The new limit for blood lead is 60 µg/100 ml (2.90 µmol/l). Workers with blood lead levels above this will need a repeat test done. If a level above the limit is confirmed, the employment medical adviser will normally temporarily suspend the employee from that work

The regulations stipulate an action limit of 50 µg/100 ml (2.41 µmol/l) above which the employer must act to try to reduce lead exposure.

For women capable of bearing children and for young employees under 18 there are lower limits

Category	Action Level	Suspension level
General	50 µg/100 ml (2.41 µmol/l)	60 µg/100 ml (2.90 µmol/l)
Women capable of having children	25 µg/100 ml (1.21 µmol/l)	30 µg/100 ml (1.45 µmol/l)
Young people under 18	40 µg/100 ml (1.93 µmol/l)	50 µg/100 ml (2.41 µmol/l)

For on-line conversion of blood lead values from one set of units to another, click here.

For exposure to lead alkyls, urine lead results are now expressed as µg/g creatinine as shown below

Category	Action Level	Suspension level
General	95 µg/g creatinine (52 nmol/mmol creatinine)	110 µg/g creatinine (60 nmol/mmol creatinine)
Women capable of having children	20 µg/g creatinine (11 nmol/mmol creatinine)	25 µg/g creatinine (13.6 nmol/mmol creatinine)