Percentage of metal leached from cigarette butts with respect to concentration in whole American cigarettes and annual amount of metal leached from cigarette butts littered worldwide
| Metal | Concentration in whole cigarette, μg/g | Percentage leached | Amount leached worldwide,* kg/year |
| Al | 950±35416 | 1.2±0.5 | 9.26±1.99 |
| Ba | 48.7±11.216 | 21±8 | 8.76±2.52 |
| Cd | 0.99±0.4923 | 14±9 | 0.120±0.048 |
| Cr | 1.78±2.3716 | 17±23 | 0.254±0.117 |
| Cu | 11±0.523 | 36±6 | 3.33±1.25 |
| Fe | 394±1323 | 11±3 | 38.1±8.2 |
| Mn | 178±823 | 23±3 | 33.8±3.7 |
| Ni | 2.75±0.3123 | 12±3 | 0.288±0.215 |
| Pb | 2.39±0.3223 | 59±15 | 1.20±0.27 |
| Sr | 39.6±14.016 | 59±22 | 19.7±2.1 |
| Ti | 106±6116 | 0.7±0.4 | 0.644±0.084 |
| Zn | 35.3±0.723 | 19±2 | 5.54±0.91 |
↵* Calculated using highest mean metal concentration leached and estimated amount of cigarette butts littered annually.1