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This layer depicts groundwater basins that have a final maximum annual yield (MAY) determination by the Oklahoma Water Resources Board (TITLE 785. OKLAHOMA WATER RESOURCES BOARD, CHAPTER 30. TAKING AND USE OF GROUNDWATER, SUBCHAPTER 9. MAXIMUM ANNUAL YIELD DETERMINATIONS).
Basin labels include the Equal Proportionate Share (EPS). The EPS is the maximum annual withdrawal of water allocated by an OWRB permit for each acre of land owned overlying that basin. EPS units are acre-feet/acre/year. For basins without a MAY determination, a maximum annual withdrawal of 2.0 acre-feet of water/acre may be authorized by temporary OWRB permits. |