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The water graph shows four water usage lines labeled unaccounted, septic, outdoor, and total.
The unaccounted black line represents the water that is pumped from the source but is unaccounted for through a user meter (UFW). Losses can result from water consumed in the treatment process, distribution system leaks, and unbilled water usage. UFW for the 16 county Metropolitan North Georgia Water Planning District (MNGWPD) ranges from 12% to 25% with an average loss of 18% district wide. Gainesville's UFW is currently 20%.
The septic brown line represents water that reaches a site that is on septic rather than sewer. Water that is processed through septic systems is not immediately available for reuse and is considered lost water by EPD in terms of direct water returned for reuse in the system. The position of the septic line on the graph represents the sum of UFW and septic water.
The outdoor green line represents water that reaches a residential site that is on sewer that is used outdoors. Water that ends up on land is also considered lost water by EPD in terms of direct water returned for reuse in the system. The position of the outdoor line on the graph represents the sum of UFW, septic, and outdoor water.
The total blue line on the graph represents the the total water withdrawn from source by a water treatment plant. As such it is the sum of all unaccounted and metered water.
The grey area below the green outdoor water line is the total of all water that is not available for immediate reuse in the water cycle. If this intersects the water permit limit red lines are drawn to note the permit level and year when that occurs.
The advantage of the graph is the display of how the different lost water components make up the total lost water.
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Several parameters of this element are dependent on State legislation, resolution of water agreements between Alabama, Florida, and Georgia, and implementation of the Metropolitan North Georgia Water Planning District. The current Public Utilities Department estimates project that Hall County will hit the EPD withdrawl permit limit between 2030 and 2040.
The UFW is currently around 20% for the Gainesville water system. In the 16 county Metropolitan North Georgia Water Planning District, the lowest UFW is 11%. This graph is based on the assumption in the projections that Hall County UFW will drop down to 11% by 2100.
It is possible that the future EPD water withdrawl permit limit for Hall County will be around 50 mgd. Current per capita water use is estimated to be 182 gallons per day based on the current undercounted population count. Corrected for the undercount (see the population documentation) our per capita use is approximately X gallons per day. At the rate of X gallons per capita per day the 50mgd limit is reached around 2030(+).
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