The Air Quality (Ozone) (Wales) Regulations 2003

Regulations 6, 7(8) and (9)

SCHEDULE 7 INFORMATION AND ALERT THRESHOLDS

PART I Information and alert thresholds for ozone

	Parameter	Threshold
(a) The exceedance of the threshold is to be measured or predicted for three consecutive hours.
Information threshold	1 hour average	180μg/m3
Alert threshold	1 hour average (a)	240/μg/m3

PART II Minimum details to be supplied to the public when the information or alert threshold is exceeded or exceedance is predicted

Details to be supplied to the public on a sufficiently large scale as soon as possible should include:

1.  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.

2.  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)

3.  Information on the type of population concerned, possible health effects and recommended conduct:

(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.

4.  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.