Emission measurements

The best statistics in Europe

Wherever waste is burned, gases are released. How much and what exactly those exhaust gases are allowed to contain is subject to strict rules. So ISVAG keeps a very close eye on this aspect. Through a very precise automatic measuring system, ISVAG keeps meticulous records of what is released in its flue gases. Independent laboratories perform additional checks. But time and again, all the measurement results for chloride, sulphur dioxide, carbon monoxide, hydrocarbons and nitrogen oxide are exactly what they should be, and are even well within the statutory requirements. The dioxin content of the flue gases only just registers on the measurement scale. With these results, ISVAG is among the top 5% of cleanest incinerators in Europe.


How to read the graph?

Measurement results

The measured values shown in the table are daily averages.


The value that is prescribed by law for the incinerator, and which must not be exceeded.


The measured values and standard values for all values except dioxins (see next paragraph), expressed in mg/Nm3. These relate to emissions converted to the following conditions: Temperature 0° C, pressure 101.3 kPa, dry gas, applicable to the discharged flue gases, calculated at 11% O ² (Ref. VLAREM environmental regulations section 4.4.3).


For the concentration of polychlorinated dibenzodioxins (PCDDs) and polychlorinated dibenzofurans (PCDFs) expressed as nanograms of dioxin toxic equivalent per Nm3 (ng TEQ/Nm3) none of the values measured in a sampling period of minimum 6 and maximum 8 hours is allowed to exceed mean values of 0.1 ng TEQ / Nm3 (1 ng = 0.000000001 g = 1 billionth of a gram). Unlike all the other substances, is not technically possible to measure dioxins continuously. Therefore, these emissions are measured, as prescribed by law, twice a year by an external accredited laboratory.

No value

If "no value" is shown for a particular component, it means that due to calibration or maintenance of the measuring instrument concerned, fewer than 44 half-hourly averages of the measurement data are available which, according to the VLAREM legislation, means it is impossible to calculate a relevant daily average.

Measured components

Carbon monoxide
Nitrogen oxides
Sulphur dioxide
Total particulate content
Tot. carbon
Total organic carbon compounds
Dioxin concentration (see above)

Furnace 1

Measurement date
26% (13 mg/Nm3) 50 mg/Nm3
12% (1.2 mg/Nm3) 10 mg/Nm3
55% (110 mg/Nm3) 200 mg/Nm3
34% (17 mg/Nm3) 50 mg/Nm3
5% (0.5 mg/Nm3) 10 mg/Nm3
Tot. carbon
5% (0.5 mg/Nm3) 10 mg/Nm3
3% (0.003 ng TEQ/Nm3) 0.1 ng TEQ/Nm3

Furnace 2


* According to legislation dioxin measurements are performed by an external certified laboratory twice a year. On top of this ISVAG continuously takes samples on which additional measurements are carried out every two weeks. The figures of the last external dioxin measurement in the table above date from December 2018.