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State Well NumbersSince 1971, Hawaiʻi's well-numbering system has contained seven digits. The first digit distinguishes the island, which is then followed by a dash separator. The next four digits represent the grid system, with the first two digits representing minutes of latitude and the second two digits representing minutes of longitude for that grid (using leading zeroes for minute values less than 10). To distinguish wells within a minute grid, two digits were added following the 4-digit minutegrid numbers with a dash separator, and are sometimes referred to as a sequence number.In 2012, Hawaiʻi's well-numbering system was modified to accommodate more wells than the previous numbering system would allow. The sequence number was changed from two digits to three digits, allowing for a grid to have 100 or more wells. If the sequence number is less than 100, the new numbering system places a zero in front of the 2 digits. References to wells in this report will only use a two-digit sequence number when the sequence number is less than 100.