The Air Quality Standards Regulations 2007

Information on concentrations

23.—(1) The Secretary of State shall make available information in respect of—

(a) concentrations of Group A pollutants;

(b) concentrations of Group B pollutants;

(c) concentrations of ozone; and

(d) in so far as measured or monitored under Part 3 of these Regulations—

(i) concentrations of mercury, PM_2.5 and polycyclic aromatic hydrocarbons; and

(ii) deposition rates of Group B pollutants, mercury and basic polycyclic aromatic hydrocarbons.

(2) The information referred to in paragraph (1)(a) shall be updated in the cases of—

(a) benzene, as an average value over the preceding 12 months—

(i) at least on a three-monthly basis; and

(ii) where practicable, on a monthly basis;

(b) carbon monoxide, as a maximum running average over eight hours—

(i) at least on a daily basis; and

(ii) where practicable, on an hourly basis;

(c) lead, on a three monthly basis; and

(d) nitrogen dioxide, sulphur dioxide and PM₁₀—

(i) at least on a daily basis; and

(ii) in the case of hourly values for nitrogen dioxide and sulphur dioxide, where practicable, on an hourly basis.

(3) The information required to be made available by paragraph (1)(c) shall be updated—

(a) at least on a daily basis; and

(b) where appropriate and practicable, on an hourly basis.

(4) The information required to be made available by paragraph (1)(d)(i) in respect of PM_2.5 shall be updated at least on a daily basis.