- Y Diweddaraf sydd Ar Gael (Diwygiedig)
- Gwreiddiol (a wnaed Fel)
Dyma’r fersiwn wreiddiol (fel y’i gwnaed yn wreiddiol).
Regulations 7(8), 8(1)
The following upper and lower assessment thresholds will apply:
Health protection | Ecosystem protection | |
---|---|---|
Upper assessment threshold | 60% of 24-hour limit value (75 µg/m3), not to be exceeded more than 3 times in any calendar year | 60% of winter limit value (12 µg/m3) |
Lower assessment threshold | 40% of 24-hour limit value (50 µg/m3), not to be exceeded more than 3 times in any calendar year | 40% of winter limit value (8 µg/m3) |
Hourly limit value for the protection of human health (NO2) | Annual limit value for the protection of human health (NO2) | Annual limit value for the protection of vegetation (NOx) | |
---|---|---|---|
Upper assessment threshold | 70% of limit value (140 µg/m3), not to be exceeded more than 18 times in any calendar year | 80% of limit value (32 µg/m3) | 80% of limit value (24 µg/m3) |
Lower assessment threshold | 50% of limit value (100 µg/m3), not to be exceeded more than 18 times in any calendar year | 65% of limit value (26 µg/m3) | 65% of limit value (19.5 µg/m3) |
24-hour average | Annual average | |
---|---|---|
Upper assessment threshold | 60% of limit value (30 µg/m3), not to be exceeded more than seven times in any calendar year | 70% of limit value (14 µg/m3) |
Lower assessment threshold | 40% of limit value (20 µg/m3), not to be exceeded more than seven times in any calendar year | 50% of limit value (10 µg/m3) |
Annual average | |
---|---|
Upper assessment threshold | 70% of limit value (0.35 µg/m3) |
Lower assessment threshold | 50% of limit value (0.25 µg/m3) |
Annual Average | |
---|---|
Upper assessment threshold | 70% of limit value (3.5 µg/m3) |
Lower assessment threshold | 40% of limit value (2 µg/m3) |
Eight-hour average | |
---|---|
Upper assessment threshold | 70% of limit value (7mg/m3) |
Lower assessment threshold | 50% of limit value (5mg/m3) |
Exceedances of upper and lower assessment thresholds must be determined on the basis of concentrations during the previous five years where sufficient data are available. An assessment threshold will be deemed to have been exceeded if it has been exceeded during at least three separate years out of the previous five years.
Where fewer than five years' data are available, measurement campaigns of short duration during the period of the year and at locations likely to be typical of the highest pollution levels may be combined with results obtained from emission inventories and modelling to determine exceedances of the upper and lower assessment thresholds.
Y Diweddaraf sydd Ar Gael (diwygiedig):Y fersiwn ddiweddaraf sydd ar gael o’r ddeddfwriaeth yn cynnwys newidiadau a wnaed gan ddeddfwriaeth ddilynol ac wedi eu gweithredu gan ein tîm golygyddol. Gellir gweld y newidiadau nad ydym wedi eu gweithredu i’r testun eto yn yr ardal ‘Newidiadau i Ddeddfwriaeth’.
Gwreiddiol (Fel y’i Deddfwyd neu y’i Gwnaed): Mae'r wreiddiol fersiwn y ddeddfwriaeth fel ag yr oedd pan gafodd ei deddfu neu eu gwneud. Ni wnaed unrhyw newidiadau i’r testun.
Gallwch wneud defnydd o ddogfennau atodol hanfodol a gwybodaeth ar gyfer yr eitem ddeddfwriaeth o’r tab hwn. Yn ddibynnol ar yr eitem ddeddfwriaeth sydd i’w gweld, gallai hyn gynnwys:
Defnyddiwch y ddewislen hon i agor dogfennau hanfodol sy’n cyd-fynd â’r ddeddfwriaeth a gwybodaeth am yr eitem hon o ddeddfwriaeth. Gan ddibynnu ar yr eitem o ddeddfwriaeth sy’n cael ei gweld gall hyn gynnwys:
liciwch ‘Gweld Mwy’ neu ddewis ‘Rhagor o Adnoddau’ am wybodaeth ychwanegol gan gynnwys