







According to an 8-hour time-weighted average (TWA), the UK's workplace exposure limit for respirable crystalline silica is 0.1 mg/m³. This implies that the average amount of RCS in the air a worker breathes during a workday should not be more than this.
It is crucial to remember that this is the highest legal threshold and not a "safe" limit. In order to lower the danger of long-term sickness, many health professionals advise aiming well below the WEL. Lower exposures are always preferable.