Technical Annual Status Report (Stage 2) for the CLRTAP Inventory Review: Synthesis and Assessment Country report
KEY CATEGORY ANALYSIS
Party: IE 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 | 3Da1 (13.4%) | 3Da3 (12.0%) | 1A3bi (11.6%) | 1A3biii (8.5%) | 1A3bii (7.5%) | 3Da2a (7.4%) | 1A3dii (5.9%) | 1A4bi (5.4%) | 1A1a (4.6%) | 1A2gvii (4.0%) | 80.4% |
| NMVOC | 2024 | 2H2 (30.6%) | 3B1b (19.0%) | 2D3a (11.1%) | 3B1a (10.1%) | 1A4bi (5.6%) | 3De (4.2%) | 80.5% | ||||
| SOx | 2024 | 1A4bi (70.1%) | 1A2f (12.3%) | 82.4% | ||||||||
| NH3 | 2024 | 3Da2a (25.6%) | 3B1b (24.8%) | 3Da1 (16.0%) | 3B1a (13.1%) | 3Da3 (10.6%) | 90.2% | |||||
| PM2.5 | 2024 | 1A4bi (44.6%) | 1A3bvi (8.5%) | 1A2f (6.3%) | 3B1b (4.2%) | 2A1 (3.9%) | 1A2gviii (3.8%) | 1A3bvii (3.8%) | 3B1a (2.9%) | 1A1a (2.7%) | 80.6% | |
| PM10 | 2024 | 1A4bi (23.7%) | 2D3b (22.2%) | 1A3bvi (8.7%) | 3Dc (5.7%) | 2A5b (4.9%) | 2A1 (3.7%) | 1A3bvii (3.7%) | 1A2f (3.6%) | 3B1b (3.4%) | 3B1a (2.3%) | 81.9% |
| TSP | 2024 | 2D3b (59.9%) | 1A4bi (9.2%) | 2A5b (5.8%) | 1A3bvi (4.0%) | 1A3bvii (2.6%) | 81.6% | |||||
| BC | 2024 | 1A4bi (26.5%) | 1A3bvi (12.7%) | 1A2f (10.8%) | 1A2gvii (10.0%) | 1A2gviii (6.6%) | 1A3bi (6.0%) | 1A3biii (4.6%) | 1A4ai (4.0%) | 81.3% | ||
| CO | 2024 | 1A4bi (58.4%) | 1A3bi (16.5%) | 1A1a (6.8%) | 81.7% | |||||||
| Pb | 2024 | 1A3bvi (75.0%) | 1A4bi (12.3%) | 87.3% | ||||||||
| Cd | 2024 | 1A2gviii (25.0%) | 2D3i (18.6%) | 1A3bvi (12.2%) | 1A1a (11.8%) | 1A4bi (10.5%) | 1A4ai (6.0%) | 84.1% | ||||
| Hg | 2024 | 1A4bi (21.5%) | 1A2f (19.4%) | 1A1a (13.2%) | 5A (9.7%) | 5C1bv (7.4%) | 1A3bi (6.0%) | 1A2b (5.3%) | 82.4% | |||
| As | 2024 | 5C1bi (69.0%) | 1A1a (12.6%) | 81.7% | ||||||||
| Cr | 2024 | 1A3bvi (59.9%) | 5C1bi (18.1%) | 2D3i (4.5%) | 82.4% | |||||||
| Cu | 2024 | 1A3bvi (85.2%) | 85.2% | |||||||||
| Ni | 2024 | 1A1a (29.0%) | 1A4ai (27.6%) | 1A2f (11.2%) | 1A3bvi (7.0%) | 2D3i (5.7%) | 80.4% | |||||
| Se | 2024 | 1A4bi (76.0%) | 1A1a (12.3%) | 88.3% | ||||||||
| Zn | 2024 | 1A3bvi (55.5%) | 2D3i (13.9%) | 1A4bi (8.9%) | 1A2gviii (7.5%) | 85.7% | ||||||
| DIOX | 2024 | 1A4bi (67.9%) | 5E (20.0%) | 87.8% | ||||||||
| PAH | 2024 | 1A4bi (90.5%) | 90.5% | |||||||||
| HCB | 2024 | 3Df (87.2%) | 87.2% | |||||||||
| PCB | 2024 | 5E (55.8%) | 1A4bi (34.1%) | 90.0% | ||||||||
| Component | Year | Key categories (Sorted from high to low from left to right) | Total | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| NOx | 2010 | 1A3biii (21.7%) | 3Da1 (11.2%) | 1A1a (9.6%) | 1A3bi (8.9%) | 3Da3 (7.7%) | 1A3bii (6.1%) | 1A4bi (6.0%) | 3Da2a (4.9%) | 1A4cii (4.4%) | 80.5% | |
| NMVOC | 2010 | 3B1b (22.1%) | 2H2 (16.1%) | 1A4bi (11.7%) | 2D3a (9.1%) | 3B1a (7.0%) | 1A3bi (4.9%) | 3De (4.2%) | 2D3d (3.0%) | 1B2av (2.8%) | 80.9% | |
| SOx | 2010 | 1A1a (35.9%) | 1A4bi (33.8%) | 1A2b (9.7%) | 1A2e (5.5%) | 84.8% | ||||||
| NH3 | 2010 | 3Da2a (29.0%) | 3B1b (26.9%) | 3Da1 (16.3%) | 3Da3 (9.3%) | 81.5% | ||||||
| PM2.5 | 2010 | 1A4bi (53.1%) | 1A3bvi (4.1%) | 1A2f (3.4%) | 1A3bii (3.1%) | 1A3bi (3.0%) | 1A3biii (3.0%) | 1A1a (2.8%) | 5E (2.7%) | 3B1b (2.6%) | 2A5b (2.3%) | 80.1% |
| PM10 | 2010 | 1A4bi (29.7%) | 2D3b (15.9%) | 2A5b (12.9%) | 2A5a (6.1%) | 1A3bvi (4.6%) | 3Dc (3.7%) | 1A1a (2.3%) | 3B1b (2.2%) | 1A2f (2.1%) | 1A3bvii (1.9%) | 81.4% |
| TSP | 2010 | 2D3b (45.8%) | 2A5b (16.6%) | 1A4bi (12.3%) | 2A5a (7.3%) | 82.0% | ||||||
| BC | 2010 | 1A4bi (25.8%) | 1A3bii (12.2%) | 1A3biii (11.3%) | 1A3bi (11.1%) | 1A4cii (9.5%) | 1A3bvi (5.0%) | 1A2gvii (4.1%) | 1A2e (3.2%) | 82.4% | ||
| CO | 2010 | 1A4bi (46.7%) | 1A3bi (35.5%) | 82.2% | ||||||||
| Pb | 2010 | 1A3bvi (55.2%) | 1A4bi (22.3%) | 1A3aii(i) (6.8%) | 84.2% | |||||||
| Cd | 2010 | 1A1a (24.8%) | 1A2gviii (17.7%) | 2D3i (11.6%) | 1A4bi (9.4%) | 2G (8.7%) | 1A3bvi (7.4%) | 1A2e (6.9%) | 86.5% | |||
| Hg | 2010 | 1A1a (31.9%) | 1A4bi (23.3%) | 1A2f (13.5%) | 1A1c (8.6%) | 5A (5.6%) | 82.9% | |||||
| As | 2010 | 5C1bi (45.1%) | 1A1a (40.5%) | 85.6% | ||||||||
| Cr | 2010 | 1A3bvi (49.6%) | 5C1bi (15.7%) | 1A1a (9.1%) | 1A4bi (6.2%) | 80.6% | ||||||
| Cu | 2010 | 1A3bvi (83.9%) | 83.9% | |||||||||
| Ni | 2010 | 1A2b (26.9%) | 1A4ai (18.0%) | 1A1a (16.8%) | 1A2e (9.1%) | 1A2gviii (5.1%) | 1A2c (4.7%) | 80.6% | ||||
| Se | 2010 | 1A4bi (57.1%) | 1A1a (39.5%) | 96.6% | ||||||||
| Zn | 2010 | 1A3bvi (47.0%) | 1A4bi (17.0%) | 2D3i (12.6%) | 1A2gviii (7.7%) | 84.2% | ||||||
| DIOX | 2010 | 1A4bi (62.3%) | 5E (20.5%) | 82.7% | ||||||||
| PAH | 2010 | 1A4bi (93.0%) | 93.0% | |||||||||
| HCB | 2010 | 3Df (82.8%) | 82.8% | |||||||||
| PCB | 2010 | 5E (51.9%) | 1A4bi (29.2%) | 81.1% | ||||||||
| Component | Year | Key categories (Sorted from high to low from left to right) | Total | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| NOx | 2005 | 1A3biii (22.1%) | 1A1a (18.2%) | 3Da1 (7.6%) | 1A3bi (7.0%) | 3Da3 (6.1%) | 1A3bii (6.1%) | 1A2f (5.3%) | 1A4cii (5.1%) | 1A4bi (3.8%) | 81.4% | ||
| NMVOC | 2005 | 3B1b (21.4%) | 2H2 (11.2%) | 1A4bi (11.1%) | 1A3bi (8.3%) | 2D3a (7.7%) | 3B1a (6.7%) | 2D3d (5.2%) | 3De (3.7%) | 1B2av (3.1%) | 2D3i (3.0%) | 81.4% | |
| SOx | 2005 | 1A1a (57.4%) | 1A4bi (17.5%) | 1A2b (6.3%) | 81.2% | ||||||||
| NH3 | 2005 | 3Da2a (30.4%) | 3B1b (28.0%) | 3Da1 (12.3%) | 3Da3 (9.9%) | 80.7% | |||||||
| PM2.5 | 2005 | 1A4bi (44.3%) | 1A1a (5.6%) | 1A3biii (4.7%) | 1A3bii (4.7%) | 1A2f (4.3%) | 1A3bvi (3.7%) | 1A2e (3.0%) | 2A1 (3.0%) | 2A5a (2.9%) | 1A4cii (2.7%) | 3B1b (2.2%) | 80.9% |
| PM10 | 2005 | 1A4bi (24.1%) | 2D3b (19.2%) | 2A5a (12.7%) | 2A5b (5.3%) | 1A1a (4.2%) | 1A3bvi (3.9%) | 3Dc (3.1%) | 2A1 (2.9%) | 1A2f (2.7%) | 1A3biii (2.6%) | 80.8% | |
| TSP | 2005 | 2D3b (51.6%) | 2A5a (14.6%) | 1A4bi (9.3%) | 2A5b (6.3%) | 81.9% | |||||||
| BC | 2005 | 1A4bi (19.4%) | 1A3bii (15.2%) | 1A3biii (15.0%) | 1A4cii (13.3%) | 1A3bi (5.5%) | 1A2gvii (4.4%) | 1A3bvi (4.0%) | 1A2f (3.8%) | 80.6% | |||
| CO | 2005 | 1A3bi (43.3%) | 1A4bi (37.0%) | 80.3% | |||||||||
| Pb | 2005 | 1A3bvi (48.2%) | 1A4bi (19.0%) | 1A3aii(i) (9.5%) | 1A1a (7.7%) | 84.4% | |||||||
| Cd | 2005 | 1A1a (33.5%) | 1A2gviii (15.9%) | 2D3i (9.4%) | 2G (9.1%) | 1A2e (8.2%) | 1A3bvi (6.2%) | 82.3% | |||||
| Hg | 2005 | 1A1a (33.5%) | 1A2f (20.6%) | 1A4bi (18.0%) | 1A1c (5.8%) | 1A2e (4.6%) | 82.5% | ||||||
| As | 2005 | 1A1a (47.6%) | 5C1bi (34.6%) | 82.2% | |||||||||
| Cr | 2005 | 1A3bvi (42.6%) | 5C1bi (12.2%) | 1A1a (11.0%) | 2C7c (5.3%) | 1A4bi (5.0%) | 1A2f (4.4%) | 80.5% | |||||
| Cu | 2005 | 1A3bvi (83.1%) | 83.1% | ||||||||||
| Ni | 2005 | 1A1a (38.8%) | 1A2b (18.2%) | 1A4ai (12.9%) | 1A2e (5.0%) | 1A1b (4.8%) | 1A2gviii (4.7%) | 84.3% | |||||
| Se | 2005 | 1A4bi (50.1%) | 1A1a (45.5%) | 95.5% | |||||||||
| Zn | 2005 | 1A3bvi (41.6%) | 1A4bi (13.9%) | 1A1a (11.6%) | 2D3i (10.6%) | 1A2gviii (7.3%) | 85.0% | ||||||
| DIOX | 2005 | 1A4bi (59.6%) | 5E (23.0%) | 82.6% | |||||||||
| PAH | 2005 | 1A4bi (88.0%) | 88.0% | ||||||||||
| HCB | 2005 | 3Df (76.7%) | 1A1a (20.3%) | 97.0% | |||||||||
| PCB | 2005 | 5E (78.4%) | 1A4bi (11.6%) | 90.0% | |||||||||