Milk of misery
| Year | PCB levels in human milk (parts per billion) | Country |
| 1967-70 | 0-30 | Norway |
| 1972 | 0-100 | USA |
| 1972 | 20-40 | Sweden |
| 1972-76 | 1-150 | Japan |
| 1977 | 0-960 | USA |
| 1982-83 | 24-156 | India |
| Year | PCB levels in human milk (parts per billion) | Country |
| 1967-70 | 0-30 | Norway |
| 1972 | 0-100 | USA |
| 1972 | 20-40 | Sweden |
| 1972-76 | 1-150 | Japan |
| 1977 | 0-960 | USA |
| 1982-83 | 24-156 | India |