Ambient Air


UK and EU Air Quality Limits

According to DEFRA - There are a wide range of terms and concepts in national and international initiatives, for example, standards, objectives, target values and limit values. The two which feature within the UK’s Air Quality Strategy are standards and objectives. The EU Ambient Air Quality Directive and fourth Daughter Directive contain Limit Values and Target Values. The national Air Quality Objectives and EU limit and target values with which the UK must comply are summarised in the National Air Quality objectives of the Air Quality Strategy.

DEFRA Definition:

Air Quality Standards are concentrations recorded over a given time period, which are considered to be acceptable in terms of what is scientifically known about the effects of each pollutant on health and on the environment. They can also be used as a benchmark to indicate whether air pollution is getting better or worse.


Marchwood Scientific offer a full range of analysis to complement the requirements of the UK & EU legislation.

  • Sulphur Dioxide (SO2 /SOx)
  • Nitrogen Dioxide (NO2/NOx)
  • Ozone (O3)
  • Carbon Monoxide (CO)
  • Ammonia (NH3)
  • Arsenic (As)
  • Lead (Pb)
  • Nickel (Ni)
  • Benzo-a-Pyrene (BaP)
  • Benzene (C6H6)
  • 1,3-Butadiene
  • Particulate matter PM10 & PM2.5

Indoor air quality  - Sick Building Syndrome

Causes of sick building syndrome are not entirely clear but experts suspect that it's probably due to a combination of factors, including: poor ventilation or poorly maintained air conditioning systems, dust, smoke, fumes or fabric fibres in the air, bright or flickering lights. Sick building syndrome is most common in open-plan offices, but can occur in any building.

MSSL have a wide range of analytical tools to assist in identifying the root causes of problems that cause high levels of staff sickness and poor performance