- Six hundred and thirty facilities reported a total of approximately 86,000 tonnes of priority substances as manufactured, processed or used in 2015.
- Of this, about 7,000 tonnes were released to the environment, mostly to air.
- The top three most released substances - Volatile Organic Compounds (VOCs), Nitrogen Oxides (NOx) and Particulate Matter 2.5 (PM2.5) – contribute to smog.
- Substances can also be ranked by their toxicity using their toxic equivalency potential (TEP).
- The substances that contribute most to Cancer risk are Polycyclic Aromatic Hydrocarbons (PAHs), Cadmium and Lead.
- The substances that contribute most to Non-Cancer risk are Lead, Mercury and Cadmium.