Technical Annual Status Report (Stage 2) for the CLRTAP Inventory Review: Synthesis and Assessment Country report
KEY CATEGORY ANALYSIS
Party: CZ 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 | 1A3bi (20.4%) | 1A1a (18.4%) | 3Da1 (9.3%) | 1A3biii (7.8%) | 1A3bii (6.7%) | 1A4bi (6.5%) | 1A2f (4.9%) | 1A4ai (4.7%) | 3Da2a (3.1%) | 81.9% |
| NMVOC | 2024 | 1A4bi (46.1%) | 2D3d (7.8%) | 2D3a (5.9%) | 3Da2a (5.2%) | 3B1b (5.0%) | 3B1a (4.7%) | 1A3bv (3.0%) | 2D3g (2.8%) | 80.6% | |
| SOx | 2024 | 1A1a (32.8%) | 1A4bi (18.6%) | 2B10a (9.5%) | 1B2c (7.7%) | 1A2f (7.2%) | 1A2a (6.4%) | 82.2% | |||
| NH3 | 2024 | 3Da1 (29.5%) | 3Da2a (19.6%) | 3B1b (13.7%) | 3B1a (13.3%) | 3B3 (6.9%) | 83.0% | ||||
| PM2.5 | 2024 | 1A4bi (76.0%) | 1A3bvi (3.7%) | 2G (2.3%) | 82.0% | ||||||
| PM10 | 2024 | 1A4bi (53.5%) | 3Dc (12.3%) | 2A5b (8.2%) | 1A3bvi (5.0%) | 2A5a (2.3%) | 81.3% | ||||
| TSP | 2024 | 1A4bi (41.1%) | 2A5b (19.1%) | 3Dc (8.9%) | 1A3bvi (4.5%) | 1B1a (3.1%) | 1A3bvii (2.9%) | 2A5a (2.7%) | 82.4% | ||
| BC | 2024 | 1A4bi (64.3%) | 1A3bi (11.3%) | 1A3bvi (7.1%) | 82.6% | ||||||
| CO | 2024 | 1A4bi (69.6%) | 1A2a (7.2%) | 2C1 (6.6%) | 83.5% | ||||||
| Pb | 2024 | 1A3bvi (47.3%) | 2G (19.6%) | 2C1 (8.2%) | 1A3aii(i) (5.0%) | 80.1% | |||||
| Cd | 2024 | 1A4bi (50.2%) | 2G (10.0%) | 1A1a (8.0%) | 2C6 (6.4%) | 2C1 (6.2%) | 80.9% | ||||
| Hg | 2024 | 1A1a (48.6%) | 1A4bi (10.6%) | 5C1bv (9.0%) | 1A2a (6.8%) | 1A2f (5.1%) | 80.1% | ||||
| As | 2024 | 1A4bi (25.5%) | 1A1a (21.6%) | 1A3bvi (11.2%) | 2C5 (10.7%) | 2A3 (5.6%) | 5C2 (5.2%) | 1A2f (4.2%) | 83.9% | ||
| Cr | 2024 | 1A3bvi (40.6%) | 1A1a (24.6%) | 1A4bi (22.3%) | 87.5% | ||||||
| Cu | 2024 | 1A3bvi (94.2%) | 94.2% | ||||||||
| Ni | 2024 | 1A1a (29.8%) | 1A2c (19.8%) | 1A3bvi (15.2%) | 1A4bi (9.4%) | 2G (5.5%) | 2C1 (3.4%) | 83.1% | |||
| Se | 2024 | 1A1a (85.1%) | 85.1% | ||||||||
| Zn | 2024 | 1A3bvi (52.0%) | 2C1 (8.7%) | 1A4bi (8.0%) | 1A1a (6.1%) | 5C2 (4.9%) | 2G (3.1%) | 82.7% | |||
| DIOX | 2024 | 5E (27.3%) | 1A4bi (22.3%) | 2C1 (10.3%) | 5C2 (8.9%) | 1A3bi (7.2%) | 2C7a (6.9%) | 82.8% | |||
| PAH | 2024 | 1A4bi (92.3%) | 92.3% | ||||||||
| HCB | 2024 | 1A4bi (45.9%) | 1A1a (42.6%) | 88.5% | |||||||
| PCB | 2024 | 1A1a (55.7%) | 1A4bi (23.2%) | 2C1 (8.5%) | 87.3% | ||||||
| Component | Year | Key categories (Sorted from high to low from left to right) | Total | |||||||
|---|---|---|---|---|---|---|---|---|---|---|
| NOx | 2010 | 1A1a (32.6%) | 1A3biii (14.3%) | 1A3bi (12.9%) | 3Da1 (4.5%) | 1A3bii (4.4%) | 1A4bi (4.4%) | 1A2f (4.0%) | 1A2c (3.8%) | 80.9% |
| NMVOC | 2010 | 1A4bi (53.4%) | 2D3d (8.5%) | 2D3e (3.6%) | 1A3bi (3.6%) | 2D3a (3.4%) | 2D3g (3.3%) | 3Da2a (2.9%) | 3B1b (2.6%) | 81.2% |
| SOx | 2010 | 1A1a (63.3%) | 1A4bi (13.6%) | 1A2c (7.4%) | 84.3% | |||||
| NH3 | 2010 | 3Da1 (29.9%) | 3Da2a (19.8%) | 3B1b (12.2%) | 3B1a (12.2%) | 3B3 (9.7%) | 83.7% | |||
| PM2.5 | 2010 | 1A4bi (82.2%) | 82.2% | |||||||
| PM10 | 2010 | 1A4bi (70.2%) | 3Dc (7.0%) | 1A1a (3.0%) | 80.1% | |||||
| TSP | 2010 | 1A4bi (64.7%) | 3Dc (6.0%) | 1B1a (3.8%) | 1A1a (3.0%) | 1A3bvi (2.1%) | 3B3 (1.6%) | 81.2% | ||
| BC | 2010 | 1A4bi (62.5%) | 1A3bi (8.5%) | 1A4cii (8.4%) | 1A3biii (5.1%) | 84.6% | ||||
| CO | 2010 | 1A4bi (71.9%) | 1A3bi (11.1%) | 82.9% | ||||||
| Pb | 2010 | 1A3bvi (26.1%) | 1A2a (23.9%) | 2C1 (12.2%) | 1A3aii(i) (9.6%) | 1A1a (5.8%) | 2A3 (4.7%) | 82.3% | ||
| Cd | 2010 | 1A4bi (33.7%) | 2C1 (13.5%) | 1A2a (11.5%) | 1A1a (10.1%) | 2G (7.9%) | 2C6 (5.3%) | 81.9% | ||
| Hg | 2010 | 1A1a (42.0%) | 2C1 (12.6%) | 1A4bi (12.3%) | 1A2f (6.7%) | 1A2a (5.6%) | 5C1bv (4.4%) | 83.7% | ||
| As | 2010 | 1A4bi (25.6%) | 1A1a (22.6%) | 2C5 (8.2%) | 1A4ai (7.1%) | 1A3bvi (5.3%) | 2A3 (5.1%) | 1A2a (3.4%) | 1A2f (3.4%) | 80.7% |
| Cr | 2010 | 1A1a (34.1%) | 1A3bvi (24.0%) | 1A4bi (18.9%) | 1A2a (4.5%) | 81.5% | ||||
| Cu | 2010 | 1A3bvi (90.7%) | 90.7% | |||||||
| Ni | 2010 | 1A1a (33.0%) | 1A2c (23.9%) | 1A4ai (6.1%) | 1A3bvi (5.6%) | 1A4bi (5.5%) | 2C1 (5.1%) | 1A1b (3.8%) | 83.0% | |
| Se | 2010 | 1A1a (84.1%) | 84.1% | |||||||
| Zn | 2010 | 1A3bvi (29.0%) | 2C1 (19.4%) | 1A2a (14.0%) | 1A1a (8.8%) | 1A4bi (7.0%) | 2C7c (3.8%) | 82.1% | ||
| DIOX | 2010 | 1A2a (54.8%) | 1A4bi (11.8%) | 5E (9.1%) | 2C1 (7.4%) | 83.1% | ||||
| PAH | 2010 | 1A4bi (94.6%) | 94.6% | |||||||
| HCB | 2010 | 1A4bi (74.5%) | 1A1a (16.7%) | 91.2% | ||||||
| PCB | 2010 | 1A1a (39.1%) | 1A2a (25.9%) | 1A4bi (15.7%) | 80.7% | |||||
| Component | Year | Key categories (Sorted from high to low from left to right) | Total | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| NOx | 2005 | 1A1a (31.9%) | 1A3biii (16.9%) | 1A3bi (13.7%) | 1A2f (4.2%) | 3Da1 (4.1%) | 1A4cii (3.8%) | 1A3bii (3.5%) | 1A2c (3.4%) | 81.6% | |
| NMVOC | 2005 | 1A4bi (45.7%) | 2D3d (10.1%) | 1A3bi (6.0%) | 2D3e (4.5%) | 2D3g (3.5%) | 3Da2a (3.3%) | 2D3a (3.3%) | 1B1a (3.1%) | 2D3i (2.8%) | 82.3% |
| SOx | 2005 | 1A1a (61.3%) | 1A4bi (9.2%) | 1A2c (7.7%) | 1A2a (5.8%) | 83.9% | |||||
| NH3 | 2005 | 3Da1 (28.6%) | 3Da2a (20.6%) | 3B3 (13.2%) | 3B1a (12.4%) | 3B1b (11.8%) | 86.6% | ||||
| PM2.5 | 2005 | 1A4bi (75.8%) | 1A1a (3.3%) | 1A4cii (2.2%) | 81.3% | ||||||
| PM10 | 2005 | 1A4bi (61.2%) | 3Dc (7.8%) | 1A1a (3.9%) | 1B1a (2.4%) | 2A5b (2.2%) | 1A3bvi (2.0%) | 1A4cii (1.8%) | 81.4% | ||
| TSP | 2005 | 1A4bi (53.3%) | 3Dc (6.3%) | 2A5b (5.5%) | 1B1a (4.1%) | 1A1a (3.9%) | 2A5a (2.6%) | 3B3 (2.3%) | 1A3bvi (2.0%) | 80.1% | |
| BC | 2005 | 1A4bi (52.4%) | 1A4cii (11.8%) | 1A3biii (10.2%) | 1A3bi (9.4%) | 83.7% | |||||
| CO | 2005 | 1A4bi (63.3%) | 1A3bi (18.6%) | 81.9% | |||||||
| Pb | 2005 | 1A2a (28.3%) | 1A3bvi (17.3%) | 2A3 (13.9%) | 2C1 (11.6%) | 1A3aii(i) (8.4%) | 1A1a (4.5%) | 84.1% | |||
| Cd | 2005 | 1A4bi (21.6%) | 1A2a (17.9%) | 2C1 (17.8%) | 1A1a (10.2%) | 2G (7.6%) | 2A3 (5.8%) | 80.9% | |||
| Hg | 2005 | 1A1a (42.6%) | 2C1 (15.0%) | 1A4bi (10.0%) | 1A2a (6.8%) | 1A2f (5.4%) | 5C1bv (4.2%) | 83.9% | |||
| As | 2005 | 1A1a (20.8%) | 1A4bi (17.6%) | 2A3 (9.3%) | 2C1 (8.6%) | 1A4ai (8.4%) | 1A2a (6.2%) | 1A2gviii (6.1%) | 1A3bvi (4.1%) | 81.1% | |
| Cr | 2005 | 1A1a (35.7%) | 1A3bvi (21.2%) | 1A4bi (12.7%) | 1A2a (6.9%) | 2C1 (6.0%) | 82.5% | ||||
| Cu | 2005 | 1A3bvi (87.1%) | 87.1% | ||||||||
| Ni | 2005 | 1A1a (31.6%) | 1A2c (21.1%) | 1A4ai (6.5%) | 2C7c (5.0%) | 1A2e (5.0%) | 1A1b (4.2%) | 1A2gviii (3.8%) | 2A3 (3.7%) | 80.9% | |
| Se | 2005 | 1A1a (79.2%) | 2A3 (6.4%) | 85.5% | |||||||
| Zn | 2005 | 1A3bvi (26.2%) | 1A2a (21.7%) | 2C1 (16.1%) | 1A1a (9.6%) | 1A4bi (5.6%) | 2C7c (4.0%) | 83.2% | |||
| DIOX | 2005 | 1A2a (68.0%) | 2C1 (6.9%) | 5E (6.1%) | 81.0% | ||||||
| PAH | 2005 | 1A4bi (93.0%) | 93.0% | ||||||||
| HCB | 2005 | 1A4bi (61.6%) | 1A1a (28.5%) | 90.1% | |||||||
| PCB | 2005 | 1A1a (34.3%) | 1A2a (34.0%) | 1A4bi (11.2%) | 2C1 (8.9%) | 88.4% | |||||