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- Original (As made) - Welsh
This is the original version (as it was originally made). Dim ond ar ei ffurf wreiddiol y mae’r eitem hon o ddeddfwriaeth ar gael ar hyn o bryd.
1.2 500 μg/m3 wedi'i fesur dros dair awr o'r bron mewn mannau sy'n gynrychioliadol o ansawdd yr aer dros o leiaf 100 km2 neu barth neu grynhoad cyfan, p'un bynnag yw'r lleiaf.
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Original (As Enacted or Made) - English: The original English language version of the legislation as it stood when it was enacted or made. No changes have been applied to the text.
Original (As Enacted or Made) - Welsh:The original Welsh language version of the legislation as it stood when it was enacted or made. No changes have been applied to the text.
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