Technical Annual Status Report (Stage 2) for the CLRTAP Inventory Review: Synthesis and Assessment Country report
KEY CATEGORY ANALYSIS
Party: BY Submission year: 2026
Key categories analysis is becoming important in prioritising emission sources and identifying where inventory improvements can be most efficiently implemented. We have assessed the most important sources (the sources making up 80% of the national total) for your country, based on your latest submission. The key sources for the 2024, 2010 and 2005 emissions, including the corresponding percentages, are listed below. |
| Component | Year | Key categories (Sorted from high to low from left to right) | Total | |||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| NOx | 2024 | 1A3biii (22.2%) | 1A4cii (18.9%) | 1A1a (13.9%) | 1A2f (9.0%) | 1A3bi (6.7%) | 1A4aii (5.5%) | 1A4bi (3.0%) | 1A2gvii (2.9%) | 82.1% | ||||||||
| NMVOC | 2024 | 2D3g (19.0%) | 2D3d (14.1%) | 1B2aiv (14.0%) | 2D3a (8.0%) | 1A3bi (6.9%) | 1B2av (6.7%) | 1A4bi (6.2%) | 1B2b (3.3%) | 2H2 (2.7%) | 80.9% | |||||||
| SOx | 2024 | 1B2aiv (28.2%) | 1A1b (21.3%) | 1A1a (18.9%) | 1A2f (7.0%) | 1A4ai (4.8%) | 80.1% | |||||||||||
| NH3 | 2024 | 3Da2a (22.7%) | 3B1a (18.7%) | 3Da1 (17.9%) | 3B1b (13.0%) | 3B3 (7.2%) | 3Da3 (5.1%) | 84.6% | ||||||||||
| PM2.5 | 2024 | 1A4bi (32.6%) | 1A1a (16.6%) | 2D3b (4.1%) | 1A2f (4.1%) | 1A2a (3.7%) | 2B10a (3.2%) | 1A3biii (2.9%) | 2A1 (2.9%) | 1A4ai (2.6%) | 1A4cii (2.6%) | 1A1c (2.3%) | 1A3bi (2.1%) | 1A3bvi (1.8%) | 81.5% | |||
| PM10 | 2024 | 1A4bi (20.3%) | 3Dc (14.6%) | 1A1a (11.7%) | 2D3b (5.0%) | 2A5a (4.7%) | 3B4gii (4.4%) | 2B10a (4.4%) | 2A1 (3.1%) | 1A2f (2.6%) | 3B4gi (2.3%) | 1A2a (2.3%) | 1A3bvi (2.1%) | 1A3biii (1.8%) | 1A4ai (1.6%) | 80.8% | ||
| TSP | 2024 | 1A4bi (16.9%) | 3Dc (11.5%) | 1A1a (10.2%) | 2A5a (7.6%) | 2B10a (5.7%) | 2D3b (5.0%) | 3B4gii (3.5%) | 2A1 (2.8%) | 2I (2.7%) | 3B1a (2.6%) | 3B3 (2.3%) | 1A3bvi (2.2%) | 1A2f (2.1%) | 3B1b (2.1%) | 2A6 (2.1%) | 1A2a (1.9%) | 81.1% |
| BC | 2024 | 1A4bi (22.8%) | 1A3biii (11.2%) | 1A4cii (10.7%) | 1A3bi (8.5%) | 1A2f (8.2%) | 1A2a (7.5%) | 1A4aii (5.7%) | 1A4ai (4.6%) | 1A1a (4.0%) | 83.2% | |||||||
| CO | 2024 | 1A4bi (33.1%) | 1A3bi (29.5%) | 1A4ai (5.8%) | 1A2f (5.2%) | 1A2a (4.4%) | 1A4ci (4.4%) | 82.4% | ||||||||||
| Pb | 2024 | 2C1 (49.4%) | 2A1 (20.4%) | 2C2 (10.2%) | 2A3 (4.6%) | 84.6% | ||||||||||||
| Cd | 2024 | 2C1 (67.5%) | 2A1 (7.3%) | 2B10a (4.5%) | 5C1bi (3.0%) | 82.3% | ||||||||||||
| Hg | 2024 | 2A1 (70.9%) | 5C1biii (7.8%) | 1A1a (5.3%) | 84.0% | |||||||||||||
| As | 2024 | 2A1 (21.8%) | 2A3 (19.2%) | 1A4ai (10.0%) | 1A2d (8.6%) | 1A4bi (8.3%) | 1A1c (7.6%) | 2C2 (7.0%) | 82.5% | |||||||||
| Cr | 2024 | 2C2 (29.4%) | 1A3bi (9.8%) | 1A1b (8.9%) | 2C1 (8.8%) | 1A4bi (7.5%) | 1A1a (7.0%) | 1A3biii (6.4%) | 1A4ai (6.0%) | 83.8% | ||||||||
| Cu | 2024 | 2C1 (29.0%) | 1A3bi (14.5%) | 2C2 (13.5%) | 1A3biii (9.5%) | 1A1a (5.8%) | 1A4bi (5.3%) | 1A4cii (4.7%) | 82.4% | |||||||||
| Ni | 2024 | 1A1b (51.3%) | 1A1a (20.1%) | 1A4ai (8.1%) | 1A3bi (6.1%) | 85.6% | ||||||||||||
| Zn | 2024 | 2C1 (83.5%) | 83.5% | |||||||||||||||
| DIOX | 2024 | 5C1bi (32.1%) | 2C1 (22.9%) | 1A4bi (12.2%) | 2C2 (10.5%) | 2A1 (6.9%) | 84.6% | |||||||||||
| PAH | 2024 | 1A4bi (56.9%) | 1A2f (9.3%) | 1A2a (8.5%) | 1A4ai (6.4%) | 81.1% | ||||||||||||
| HCB | 2024 | 5C1bi (39.8%) | 1A3biii (20.6%) | 1A3bi (12.4%) | 1A4cii (10.1%) | 82.9% | ||||||||||||
| PCB | 2024 | 2C1 (95.0%) | 95.0% | |||||||||||||||
| Component | Year | Key categories (Sorted from high to low from left to right) | Total | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| NOx | 2010 | 1A1a (20.2%) | 1A3biii (18.5%) | 1A4cii (17.6%) | 1A2f (7.9%) | 1A3bi (7.8%) | 1A3c (4.9%) | 1A2gvii (4.4%) | 81.3% | |||||
| NMVOC | 2010 | 1B2aiv (17.7%) | 2D3d (15.1%) | 2D3g (12.0%) | 1A3bi (9.1%) | 1A4bi (8.6%) | 2D3a (7.9%) | 1B2av (6.8%) | 1B2b (4.5%) | 81.8% | ||||
| SOx | 2010 | 1A1a (33.8%) | 1A1b (26.3%) | 1B2aiv (21.6%) | 81.8% | |||||||||
| NH3 | 2010 | 3Da2a (23.0%) | 3Da1 (18.5%) | 3B1a (17.2%) | 3B1b (11.6%) | 3B3 (10.8%) | 81.2% | |||||||
| PM2.5 | 2010 | 1A4bi (50.5%) | 1A1a (10.0%) | 2D3b (6.1%) | 1A3biii (2.9%) | 2B10a (2.7%) | 1A4ai (2.5%) | 1A4cii (2.5%) | 2A1 (2.4%) | 1A2a (1.8%) | 81.4% | |||
| PM10 | 2010 | 1A4bi (32.2%) | 3Dc (14.2%) | 2D3b (7.6%) | 1A1a (7.2%) | 2A5a (3.8%) | 2B10a (3.4%) | 3B4gii (2.9%) | 2A1 (2.6%) | 2A6 (2.4%) | 3B4gi (2.3%) | 3B3 (2.2%) | 80.7% | |
| TSP | 2010 | 1A4bi (27.3%) | 3Dc (11.4%) | 2D3b (7.6%) | 1A1a (6.5%) | 2A5a (6.1%) | 2B10a (4.4%) | 3B3 (3.8%) | 2A6 (3.8%) | 3B1a (2.6%) | 2A1 (2.4%) | 3B4gii (2.3%) | 3B1b (2.1%) | 80.2% |
| BC | 2010 | 1A4bi (38.2%) | 1A4cii (11.5%) | 1A3biii (11.2%) | 1A2gvii (5.8%) | 1A4ai (4.4%) | 1A3bi (4.3%) | 1A3c (3.7%) | 1A2a (3.1%) | 82.3% | ||||
| CO | 2010 | 1A4bi (41.0%) | 1A3bi (31.4%) | 1A3bii (5.8%) | 1A4ai (3.9%) | 82.1% | ||||||||
| Pb | 2010 | 2C1 (38.5%) | 2A3 (24.3%) | 2A1 (13.1%) | 2C2 (6.6%) | 82.5% | ||||||||
| Cd | 2010 | 2C1 (66.9%) | 2A1 (6.0%) | 1A1a (5.7%) | 1A4bi (3.9%) | 82.5% | ||||||||
| Hg | 2010 | 2A1 (61.2%) | 1A1a (13.6%) | 1A1b (5.9%) | 80.6% | |||||||||
| As | 2010 | 2A3 (47.3%) | 1A4ai (17.5%) | 1A2a (7.5%) | 1A1a (7.5%) | 2A1 (6.5%) | 86.4% | |||||||
| Cr | 2010 | 1A1a (19.6%) | 2C2 (18.7%) | 1A1b (14.1%) | 1A4bi (11.6%) | 1A4ai (8.5%) | 2C1 (6.8%) | 1A3bi (4.8%) | 84.3% | |||||
| Cu | 2010 | 2C1 (28.8%) | 2C2 (11.0%) | 1A1a (10.4%) | 1A3bi (9.2%) | 1A4bi (9.0%) | 1A3biii (8.8%) | 1A4cii (4.5%) | 81.8% | |||||
| Ni | 2010 | 1A1a (48.0%) | 1A1b (45.2%) | 93.1% | ||||||||||
| Zn | 2010 | 2C1 (84.0%) | 84.0% | |||||||||||
| DIOX | 2010 | 5C1bii (22.8%) | 5C1bi (20.7%) | 2C1 (19.4%) | 1A4bi (14.1%) | 2C2 (7.3%) | 84.3% | |||||||
| PAH | 2010 | 1A4bi (61.3%) | 1A1a (21.1%) | 82.4% | ||||||||||
| HCB | 2010 | 5C1bi (34.2%) | 1A3biii (20.6%) | 1A4cii (10.9%) | 1A1a (7.4%) | 1A3bi (6.3%) | 1A4bi (5.4%) | 84.8% | ||||||
| PCB | 2010 | 2C1 (86.9%) | 86.9% | |||||||||||
| Component | Year | Key categories (Sorted from high to low from left to right) | Total | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| NOx | 2005 | 1A1a (22.2%) | 1A3biii (19.9%) | 1A4cii (14.5%) | 1A3bi (8.7%) | 1A2f (6.7%) | 1A3c (5.3%) | 1B2aiv (4.3%) | 81.6% | ||||
| NMVOC | 2005 | 1B2aiv (21.7%) | 2D3g (13.7%) | 2D3d (13.3%) | 1A3bi (9.3%) | 1A4bi (9.0%) | 2D3a (8.2%) | 1B2av (5.9%) | 81.1% | ||||
| SOx | 2005 | 1A1a (31.2%) | 1A1b (30.0%) | 1B2aiv (23.9%) | 85.1% | ||||||||
| NH3 | 2005 | 3Da2a (23.7%) | 3B1a (20.0%) | 3Da1 (15.1%) | 3B1b (11.0%) | 3B3 (10.4%) | 80.1% | ||||||
| PM2.5 | 2005 | 1A4bi (58.9%) | 2D3b (6.0%) | 1A1a (5.7%) | 1A4ai (2.9%) | 2B10a (2.6%) | 1A3biii (2.4%) | 1A4cii (2.0%) | 80.6% | ||||
| PM10 | 2005 | 1A4bi (37.6%) | 3Dc (15.5%) | 2D3b (7.4%) | 1A1a (4.2%) | 2A6 (3.4%) | 2B10a (3.4%) | 2A5a (2.7%) | 3B4gi (2.5%) | 3B3 (2.1%) | 3B4gii (2.0%) | 80.8% | |
| TSP | 2005 | 1A4bi (31.9%) | 3Dc (12.3%) | 2D3b (7.4%) | 2A6 (5.4%) | 2A5a (4.4%) | 2B10a (4.3%) | 1A1a (3.8%) | 3B3 (3.8%) | 3B1a (3.2%) | 3B1b (2.0%) | 3B4gi (2.0%) | 80.5% |
| BC | 2005 | 1A4bi (48.4%) | 1A4cii (10.2%) | 1A3biii (10.0%) | 1A3bi (4.8%) | 1A4ai (4.4%) | 1A3c (4.3%) | 82.1% | |||||
| CO | 2005 | 1A4bi (45.7%) | 1A3bi (32.8%) | 1A3bii (4.2%) | 82.7% | ||||||||
| Pb | 2005 | 2C1 (37.9%) | 2A3 (19.7%) | 2A1 (11.4%) | 2C2 (7.4%) | 1A1a (6.7%) | 83.2% | ||||||
| Cd | 2005 | 2C1 (63.6%) | 1A1a (5.5%) | 1A4bi (5.4%) | 2A1 (5.1%) | 5C1bi (4.1%) | 83.7% | ||||||
| Hg | 2005 | 2A1 (52.2%) | 1A1a (17.2%) | 1A1b (9.0%) | 1A4ai (8.8%) | 87.1% | |||||||
| As | 2005 | 1A4ai (41.5%) | 2A3 (31.8%) | 1A4bi (10.4%) | 83.7% | ||||||||
| Cr | 2005 | 1A1a (18.3%) | 1A1b (17.0%) | 2C2 (16.1%) | 1A4ai (15.0%) | 1A4bi (13.5%) | 2C1 (5.1%) | 84.8% | |||||
| Cu | 2005 | 2C1 (25.7%) | 1A4bi (11.4%) | 2C2 (11.3%) | 1A3bi (9.8%) | 1A1a (9.3%) | 1A3biii (7.6%) | 1A4ai (6.9%) | 81.8% | ||||
| Ni | 2005 | 1A1b (49.0%) | 1A1a (45.9%) | 94.8% | |||||||||
| Zn | 2005 | 2C1 (80.8%) | 80.8% | ||||||||||
| DIOX | 2005 | 5C1bi (48.1%) | 1A4bi (16.8%) | 2C1 (16.4%) | 81.3% | ||||||||
| PAH | 2005 | 1A4bi (72.8%) | 1A1a (9.7%) | 82.5% | |||||||||
| HCB | 2005 | 5C1bi (48.2%) | 1A3biii (17.1%) | 1A4cii (9.0%) | 1A4bi (6.8%) | 81.2% | |||||||
| PCB | 2005 | 2C1 (79.9%) | 5C1bi (14.7%) | 94.5% | |||||||||