National Pollutant Inventory

Substances

Substance list and thresholds

NPI substances required to be reported for the first three reporting years (1998 - 1999, 1999 - 2000, 2000 - 2001)

Table 3
prefix Substance CAS No. Threshold Category Threshold
  Acetone 67-64-1 1 10 tonnes per year
  Arsenic & compounds 7440-38-2 1 10 tonnes per year
      2b 2,000 tonnes per year,
or 60,000 megawatt
hours, or rated at 20 megawatts
  Benzene 71-43-2 1 10 tonnes per year
1,3- Butadiene (vinyl ethylene) 106-99-0 1 10 tonnes per year
  Cadmium & compounds 7440-43-9 1 10 tonnes per year
      2b 2,000 tonnes per year,
or 60,000 megawatt
hours, or rated at 20 megawatts
  Carbon monoxide 630-08-0 1 10 tonnes per year
      2a 400 tonnes per year, or
1 tonne per hour
  Chromium (VI) compounds 7440-47-3 1 10 tonnes per year
      2b 2,000 tonnes per year,
or 60,000 megawatt
hours, or rated at 20 megawatts
  Cobalt & compounds 7440-48-4 1 10 tonnes per year
  Cyanide (inorganic) compounds N/A 1 10 tonnes per year<
1,2- Dibromoethane 106-93-4 1 10 tonnes per year
  Dichloromethane 75-09-2 1 10 tonnes per year
2- Ethoxyethanol 110-80-5 1 10 tonnes per year
2- Ethoxyethanol acetate 111-15-9 1 10 tonnes per year
  Ethylene glycol (1,2-ethanediol) 107-21-1 1 10 tonnes per year
  Fluoride compounds N/A 1 10 tonnes per year
      2a 400 tonnes per year, or
1 tonne per hour
  Glutaraldehyde 111-30-8 1 10 tonnes per year
  Lead & compounds 7439-92-1 1 10 tonnes per year
      2b 2,000 tonnes per year,
or 60,000 megawatt
hours, or rated at 20 megawatts
  Mercury & compounds 7439-97-6 1 10 tonnes per year
      2b 2,000 tonnes per year,
or 60,000 megawatt
hours, or rated at 20 megawatts
  Methanol 67-56-1 1 10 tonnes per year
  Methyl ethyl ketone 78-93-3 1 10 tonnes per year
  Methyl isobutyl ketone 108-10-1 1 10 tonnes per year
  Methyl methacrylate 80-62-6 1 10 tonnes per year
  Nickel carbonyl 13463-39-3 1 10 tonnes per year
      2b 2,000 tonnes per year,
or 60,000 megawatt
hours, or rated at 20 megawatts
  Nickel subsulfide 12035-72-2 1 10 tonnes per year
      2b 2,000 tonnes per year,
or 60,000 megawatt
hours, or rated at 20 megawatts
  Oxides of Nitrogen N/A 2a 400 tonnes per year, or
1 tonne per hour
  Particulate Matter 10.0 um (PM10) N/A 2a 400 tonnes per year, or
1 tonne per hour
  Polycyclic aromatic hydrocarbons N/A 2a 400 tonnes per year, or
1 tonne per hour
  Sulfur dioxide 7446-09-5 1 10 tonnes per year
      2a 400 tonnes per year, or
1 tonne per hour
  Sulfuric acid 7664-93-9 1 10 tonnes per year
  Tetrachloroethylene 127-18-4 1 10 tonnes per year
  Toluene (methylbenzene) 108-88-3 1 10 tonnes per year
  Toluene-2,4- diisocyanate 584-84-9 1 10 tonnes per year
  Total nitrogen N/A 3 15 tonnes per year
  Total phosphorus N/A 3 3 tonnes per year
  Trichloroethylene 79-01-6 1 10 tonnes per year
  Xylenes (individual or mixed isomers) 1330-20-7 1 10 tonnes per year

More information about reporting some NPI substances.

  1. In this Schedule:
    1. the threshold for category 1 acids refers to the amount of the acid compound used (for example, in the case of Hydrochloric acid, the threshold refers to the amount of hydrogen chloride used). This amount can be calculated as a factor of volume and concentration;
    2. the thresholds for total Nitrogen and total Phosphorus refer only to the amounts of those Nitrogen and Phosphorus compounds that give rise to nitrate/nitrite and phosphate ions respectively;
    3. the threshold for Ammonia (total) refers to the total amount of both ammonia (NH3 CAS number 7664-41-7) and the ammonium ion (NH4+) in solution;
    4. the threshold for Chlorine includes the amount of hypochlorite and like substances used;
    5. the threshold for category 1 substances that are listed as (a metal) compounds refers to the total amount of the metal and its compounds used (for example, Lead & compounds refers to Lead and all compounds which incorporate Lead);
    6. the threshold for Phenol (CAS number 108-95-2) refers, at the discretion of the reporting facility, to either the total amount of phenolic compounds used or the total amount of phenol used.
  2. For the purposes of estimating emission data to be reported under clause 9 of the Measure:
    1. the amount of a category 1 acid emitted refers to the amount of the actual acid compound emitted (for example, in the case of Hydrochloric acid, the amount emitted refers to the amount of hydrogen chloride emitted). It does not include any amounts of the acid that have been neutralised before release as the acid no longer exists;
    2. the amounts of total Nitrogen and total Phosphorus emitted refer to the amounts of those Nitrogen and Phosphorus compounds emitted that give rise to nitrate/nitrite and phosphate ions respectively;
    3. the amount of Ammonia (total) emitted refers to the total amount of both Ammonia (NH3 CAS number 7664-41-7) and the ammonium ion (NH4+) emitted in solution;
    4. the amount of Chlorine emitted refers only to the amount chlorine (Cl CAS number 7782-50-5) emitted;
    5. the amount emitted in relation to a substance listed as (a metal) & compounds refers only to the amount of the metal emitted (for example, the amount of Lead & compounds emitted refers only to the amount of Lead emitted);
    6. the amount of Phenol (CAS number 108-95-2) emitted refers, at the discretion of the reporting facility, to either the total amount of phenolic compounds emitted or the total amount of Phenol emitted.

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Cascade Beverage Company. Credit: Michael Lindquist