12.—(1) The National Assembly must ensure that up-to-date information on ambient concentrations of each of the relevant pollutants is routinely made available to the public.
(2) Information on ambient concentrations of sulphur dioxide, nitrogen dioxide and particulate matter must be updated—
(a)in the case of hourly values for sulphur dioxide and nitrogen dioxide, where practicable on an hourly basis;
(b)in all other cases, as a minimum on a daily basis.
(3) Information on ambient concentrations of lead must be updated on a three-monthly basis.
(4) Information on ambient concentrations of benzene, as an average value over the last 12 months, must be updated—
(a)where practicable on a monthly basis;
(b)in all other cases, as a minimum on a three-monthly basis.
(5) Information on ambient concentrations of carbon monoxide, as a maximum running average over eight hours, must be updated—
(a)where practicable on an hourly basis;
(b)in all other cases, as a minimum on a daily basis.
(6) Information made available under paragraph (1) must include—
(a)an indication of the extent to which limit values and alert thresholds for particular pollutants have been exceeded over the averaging periods specified in Schedule 1; and
(b)a short assessment of those exceedances and their effects on health.
(7) When an alert threshold is exceeded, the National Assembly must ensure that the necessary steps are taken to inform the public, and the information made available must as a minimum include the information specified in paragraphs 1.3 of Part I and 2.3 of Part II of Schedule 1.
(8) Information to be made available to the public under this regulation must include the map of zones referred to in regulation 2 and action plans, plans and programmes prepared under regulations 9 and 10 respectively.
(9) For the purposes of this regulation, the public includes, but is not limited to, health care bodies and organisations having an interest in ambient air quality and representing the interests of sensitive populations, consumers and the environment.
(10) Information made available under this regulation must be clear, comprehensible and accessible.