6 | Amakpe International Refinery, Chase Wood Consortium Nigeria Limited, Resources Refinery & Qua Petroleum Refinery Limited Akwa Ibom State | PM10 | 8.0 | 3.2 |
SO2 | 501 | 19.3a | ||
NOx | 2214 | 29.5a | ||
CO | 480.3 | 3.7 | ||
VOC | 7.0 | 0.4 | ||
7 | Clean Water Refinery, NSP Refineries and Oil Services Limited, RIVGAS Petroleum & Energy Limited, Starrex Petroleum Refinery, Port Harcourt Refining Company I & Port Harcourt Refining Company II River state | PM10 | 0.2 | 0.4 |
SO2 | 204 | 7.8a | ||
NOx | 957 | 12.8a | ||
CO | 1.6 | 3.5 | ||
VOC | 0.1 | 0.1 |