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| Hüti F-358 borehole | Estonia | 58.9N, 22.5E | 7 | 4 | 82 | 81 | |
| Hino 452 borehole | Estonia | 57.6N, 27.2E | 17 | 29 | 49 | 140 | |
| Irase 680 borehole | Estonia | 58.3N, 22.4E | 1 | 1 | 5 | 15 | |
| Hirvli 8 borehole | Estonia | 59.4N, 25.6E | 13 | 0 | 2 | 2 | |
| Holdre borehole | Estonia | 57.9N, 25.8E | 20 | 0 | 0 | 0 | |
| Holstre 1 borehole | Estonia | 58.3N, 25.7E | 3 | 3 | 28 | 93 | |
| Hübja 712 borehole | Estonia | 58.4N, 22.5E | 0 | 1 | 0 | 0 | |
| Hulja F-150 borehole | Estonia | 59.4N, 26.2E | 10 | 2 | 22 | 46 | |
| Hullo 385 borehole | Estonia | 59.0N, 23.2E | 10 | 44 | 53 | 53 | |
| Humala F-327 borehole | Estonia | 59.4N, 24.4E | 2 | 1 | 10 | 10 | |
| Härgla F-290 borehole | Estonia | 59.1N, 24.9E | 7 | 3 | 22 | 22 | |
| Häädemeeste 172 borehole | Estonia | 58.1N, 24.6E | 35 | 430 | 899 | 673 | |
| Irase 682 borehole | Estonia | 58.3N, 22.4E | 0 | 0 | 0 | 0 | |
| Hüüru F-296 borehole | Estonia | 59.4N, 24.5E | 6 | 1 | 9 | 7 | |
| Hindu 653 borehole | Estonia | 58.1N, 22.2E | 3 | 1 | 7 | 21 | |
| Ilgai 54 borehole | Lithuania | 54.3N, 24.2E | 6 | 0 | 0 | 0 | |
| Iisaku 73г borehole | Estonia | 59.1N, 27.3E | 4 | 0 | 0 | 0 | |
| Ikla borehole | Estonia | 57.9N, 24.4E | 44 | 1930 | 1018 | 643 | |
| Illuka 81 K-5 borehole | Estonia | 59.2N, 27.5E | 8 | 19 | 153 | 33 | |
| Ilpla 924 borehole | Estonia | 58.3N, 22.7E | 0 | 0 | 0 | 0 | |
| Ilumäe F-128 borehole | Estonia | 59.5N, 25.9E | 6 | 17 | 6 | 3 | |
| Imari 611 borehole | Estonia | 58.1N, 22.2E | 0 | 0 | 3 | 9 | |
| Ämari F-318 borehole | Estonia | 59.2N, 24.2E | 4 | 0 | 20 | 19 | |
| Imastu F-140 borehole | Estonia | 59.3N, 26.0E | 7 | 17 | 35 | 32 | |
| Ingelandi 615 borehole | Estonia | 58.0N, 22.1E | 2 | 0 | 2 | 5 | |