| Puisma F-191 borehole | Estonia | 59.3413, 26.8429 | 9 | 1 | 40 | 42 | |
| Nurme 807 borehole | Estonia | 58.5376, 22.6093 | 1 | 13 | 0 | 0 | |
| Ložgolovo borehole | Russia | 59.1849, 28.7473 | 0 | 0 | 0 | 0 | |
| Orissaare 852 borehole | Estonia | 58.5476, 23.0856 | 1 | 2 | 0 | 0 | |
| Linnuse F-144 borehole | Estonia | 59.4766, 26.4695 | 5 | 2 | 35 | 69 | |
| Lipu 6301 borehole | Estonia | 59.2240, 27.0779 | 3 | 145 | 73 | 71 | |
| Lõetsa 842 borehole | Estonia | 58.6312, 23.3196 | 6 | 4 | 114 | 266 | |
| Püssina 939 borehole | Estonia | 58.6469, 23.3327 | 1 | 3 | 0 | 0 | |
| Lohu F-280 borehole | Estonia | 59.1416, 24.7697 | 8 | 9 | 19 | 20 | |
| Lohusalu borehole | Estonia | 59.3954, 24.1988 | 0 | 1 | 4 | 1 | |
| Lokno 1 borehole | Russia | 57.5903, 27.8508 | 1 | 0 | 0 | 0 | |
| Lokuta 320 borehole | Estonia | 58.8733, 24.8359 | 3 | 8 | 0 | 0 | |
| Loode 620 borehole | Estonia | 57.9745, 21.9857 | 3 | 0 | 7 | 21 | |
| Loode 724 borehole | Estonia | 58.2343, 22.4190 | 0 | 9 | 1 | 2 | |
| Lihuveski borehole, Raplamaa | Estonia | | 18 | 16 | 7 | 10 | |
| Lööne 814 borehole | Estonia | 58.4162, 22.6947 | 1 | 2 | 0 | 0 | |
| Lihula H-214-2 borehole | Estonia | 58.6852, 23.8082 | 0 | 0 | 0 | 0 | |
| Ludza 15 borehole | Latvia | 56.5467, 27.7258 | 27 | 53 | 16 | 19 | |
| Luidja F-357 borehole | Estonia | 58.9313, 22.3431 | 6 | 7 | 127 | 130 | |
| Luidja K56 borehole | Estonia | 58.9293, 22.3874 | 0 | 0 | 0 | 0 | |
| Luulupe 808 borehole | Estonia | 58.4722, 22.5992 | 1 | 2 | 0 | 0 | |
| Luulupe 960 borehole | Estonia | 58.4538, 22.6209 | 0 | 0 | 0 | 0 | |
| Luutsniku 451 borehole | Estonia | 57.6252, 27.0028 | 15 | 22 | 55 | 242 | |
| Luzitsa river borehole | Russia | 59.5985, 28.3118 | 0 | 0 | 0 | 0 | |
| Luzitsy borehole | Russia | 59.6393, 28.3595 | 0 | 0 | 0 | 0 | |
