The Air Quality Standards Regulations 2007

PART 2 Alert and information thresholds for ozone

2.  In cases where either the information threshold or the alert threshold for ozone—

(a) is exceeded; or

(b) is predicted to be exceeded,

the details set out in paragraphs 3 to 6 shall, as a minimum, be made available to the public on a sufficiently large scale.

3.  Information on any observed exceedance—

(a) the location or area of the exceedance;

(b) the type of threshold exceeded (information threshold or alert threshold);

(c) the time at which the exceedance began and its duration; and

(d) the highest 1-hour and 8-hour mean concentration.

4.  Forecast for the following afternoon, day or days—

(a) the geographical area of expected exceedances of an information threshold or alert threshold; and

(b) the expected change in pollution, that is, improvement, stabilisation or deterioration.

5.  Information on the type of population concerned, possible health effects and recommended conduct in particular—

(a) information on population groups at risk;

(b) description of likely symptoms;

(c) recommended precautions to be taken by the population concerned; and

(d) where to find further information.

6.  Information provided under this Schedule shall also include—

(a) information on preventive action to reduce pollution or exposure to it;

(b) an indication of main source sectors; and

(c) recommendations for action to reduce emissions.