BASIN 12 ALBEMARLE SOUND

BASIN DESCRIPTION The Albemarle Sound Basin comprises 3906 square miles of low-lying lands and expansive areas of open water in northeastern . The basin encompasses Albemarle Sound, , , , and a portion of paralleling the as far south as . Albemarle Sound is the receiving waters of the Chowan, Roanoke, and Pasquotank Rivers. Together these basins drain over 18,000 square miles the LWSP population served with water from this basin and of northern North Carolina and southern . their water use for 1992.

WATER USE 1992 LSWP System Water Use from Basin (mgd) Factors Affecting Water Demand LWSP Residential Non-resid. Total Sub-basin This basin is home to about 2% of the state’s Population Use Use Use* residents and contains all or part of 12 municipalities in 9 Albemarle Sound 93,695 5.89 1.73 10.1 counties. Currituck County is one of the state’s 12 major *Total Use also includes unaccounted-for water and sales to other systems. metropolitan areas and is actually part of the Norfolk-Virginia Beach-Newport News Metropolitan Statistical Area. Three Residential water use accounted for 58% of total counties in this basin had population growth over 10% from water use of these systems, non-residential use accounted for 1990 to 1997. Currituck and Dare counties that include 17%, and 10% of use was unaccounted-for. portions of the Outer Banks, experienced population growth The Albemarle Sound Basin supplies water to some of greater than 20% over the same period. In the coastal areas, of the State’s fastest growing counties. LWSP systems expect especially on the Outer Banks, water systems must plan to to supply water to over 154,271 persons by the year 2020, a have adequate water supplies during the summer months 65% increase over 1992 levels. Their demand is projected to when major seasonal peak demands for water occur. increase 76% to 25.2 mgd, by 2020. In the 1992 LWSPs, 11 of the 22 systems using water Total Water Use in Basin from this basin reported that available supply was not The U.S. Geological Survey’s (USGS) 1995 adequate to meet estimated demand through 2002. summary of water use estimated total water use in the basin at DWR encourages systems to begin planning to 23.4 million gallons per day (mgd), with just over two-thirds manage and meet future water demands before average daily coming from surface water sources. USGS estimated total water use reaches 80% of a system’s available supply. Data basin population at 111,830. Residential demand was for 1992 indicated that 7 of the 23 LWSP systems in this basin estimated at 11 mgd, with over 80% of this demand being had average demand above this threshold. By 2020, 10 supplied by public water systems. Overall, public water systems project demand levels that will exceed 80% of their systems supplied 11.2 mgd from ground water and 0.5 mgd available supply. from surface water for both residential and non-residential uses. The remaining residential water demand was met by 1.9 Self-supplied Use mgd of self-supplied ground water. In addition, there was The USGS estimated that self-supplied users, about 7.6 mgd of self-supplied water withdrawn for non- excluding power generating facilities, accounted for 272 mgd residential water uses. of the 433 mgd total of water used from this basin, as shown in the table below. Irrigation use accounted for 57% of the Local Water Supply Plans (LWSPs) self-supplied uses followed by livestock (20%), domestic All units of local government that supply or plan to (20%), industrial (2%), and commercial (1%). supply water to the public are required to develop a LWSP. The Division of Water Resources (DWR) reviews LWSPs and USGS Estimated Self-supplied Water Use in mgd maintains a database of the LWSP information. Sub-basin Domestic Livestock Industrial Commercial Irrigation Total Albemarle LWSPs were submitted by 23 public water systems 1.86 1.91 0.22 0.07 5.36 9.4 Sound having service area in this basin or using water from this basin. These systems supplied 14.3 mgd of water to 93,695 Registered Water Withdrawals persons. DWR estimated that 83,912 of the 93,695 persons Before 1999, anyone withdrawing 1.0 mgd or more served by these 23 LWSP systems reside in the Albemarle of surface or ground water was required to registered that Sound Basin. Of the 14.3 mgd supplied by these 23 LWSP withdrawal with DWR. In this basin there are 12 registered systems, 10.1 mgd comes from water sources in the Albemarle withdrawals other than LWSP systems or power generating Sound Basin, with the remainder coming from ground water facilities, with the cumulative capacity to withdraw 628 mgd. sources in adjoining basins. The following table summarizes In 1999, the registration threshold for all water uses except agriculture was lowered to 100,000 gallons per day. March 1, SUMMARY OF INFORMATION FROM 1992 LWSPs 2000 is the deadline for registering 1999 withdrawals. ! Per capita water use was 152 gallons in 1992 and is projected to increase to 155 gallons per day by 2010. WATER AVAILABILITY Local water supply plans indicate that there are 16 ! Three systems are not connected to another water supply systems with a total 12-hour supply of 14 mgd of ground water system. in this basin. LWSPs indicate that Nags Head is the only system in ! Four systems rely on purchase water as their sole supply. the basin with a surface water supply, a small fresh water pond with an estimated seasonal supply of about 0.3 mgd. Ground ! The reported raw water supply was 0.3 mgd surface water water for public use is limited due to high chlorides. Due to and a 12-hour groundwater supply of 16 mgd. the quality of ground water, treatment of ground water for public water supply on the Outer Banks and coastal areas ! There are six county-wide systems and one regional water requires a Reverse Osmosis (RO) process. There are plans for supply system additional RO plants in the basin. ! Water purchased by water systems in 1992 was about INTERBASIN TRANSFERS OF SURFACE WATER 11 mgd. Across the state many water systems move surface water between sub-basins to meet their needs. Only transfers ! In the coastal areas, especially on the Outer Banks, water of surface water are subject to regulation in North Carolina. systems must plan to have adequate water supplies during the While no surface water transfers affect this basin, nearly 4 mgd summer months when major seasonal peak demands for water of ground water is transferred into the Albemarle Sound Basin. occur.

! About 11 mgd of additional water supply will be needed by water systems to ensure that water demands in 2010 do not exceed 80% of available supply.

!Demand-to-supply ratios for 1992 and 2010: 1992 2010 # of Systems reporting 23 23 # of Systems reporting ratio > 1.0 2 7 # of Systems reporting ratio > 0.8 7 8 # of Systems reporting ratio > 0.5 12 12

January 2000 Draft State Water Supply Plan DENR, Division of Water Resources GATES COUNTY CURRITUCK COUNTY Gates Co. Currituck Co. South Mills

4-1 Chowan River

Pasquotank Co.

Elizabeth City Perquimans Co.

Inter County Water Assoc Winfall

Colerain Hertford CAMDEN Chowan Co. COUNTY PASQUOTANK COUNTY Dare Co. PERQUIMANS Edenton COUNTY CHOWAN COUNTY Kill Devil Hills

Columbia 14-1 Manteo Nags Head Washington Co Water System Tyrrell County Water Roper 12-1 Creswell Albemarle Sound

WASHINGTON TYRRELL COUNTY COUNTY

DARE COUNTY

BEAUFORT COUNTY Belhaven

Bath Hyde Co.

HYDE COUNTY

Aurora 15-3 Pamlico River & Sound

PAMLICO COUNTY Ocracoke S.D.

Pamlico Co.

10-1 Neuse River Oriental LEGEND Miles Basin 12 Albemarle Sound 0 2 4 6 8 (unshaded basin) County Boundary Basin Boundary ALBEMARLE SOUND 1992 and 2010 Population and Water Usage as reported by LWSP systems located in or using water from this basin Water systems showing "Demand as % of Supply" above 80% should be actively planning to control and meet future demand. Water Sources: g - ground water, s - surface water, p - purchased water mgd - million gallons per day 12 ALBEMARLE SOUND Water Total Service Population Total Water Use in mgd Reported Supply in mgd Demand as % of Supply County Water System Source* 1992 2010 1992 2010 1992 2010 1992 2010 CAMDEN SOUTH CAMDEN WSD p 0 3,800 0.00 0.25 0 0 ------SOUTH MILLS gp 3,413 5,573 0.25 0.40 0.416 0.51 59% 78% CHOWAN CHOWAN CO g 8,253 9,098 0.93 1.02 1.9 2.41 49% 42% EDENTON g 5,600 5,941 0.69 0.72 1.0845 1.3345 64% 54% CURRITUCK CURRITUCK CO g 7,280 10,031 0.45 0.70 0.5178 0.5678 87% 124% DARE CAPE HATTERAS g 6,900 11,000 0.70 1.21 0.8 1.19 87% 101% DARE CO p 3,658 6,246 0.89 1.52 2.3 2.3 39% 66% DARE CO RWS gp 0 0 3.17 5.06 -3.037 -0.445 -104% -1136% KILL DEVIL HILLS p 6,678 10,662 1.19 1.55 3.5 3.5 34% 44% MANTEO p 1,200 2,500 0.18 0.60 0.45 0.45 40% 133% NAGS HEAD sp 1,838 4,778 0.79 1.39 3 3 26% 46% HYDE OCRACOKE SD g 713 829 0.27 0.35 0.72 0.72 37% 49% PASQUOTANK ELIZABETH CITY g 14,292 22,000 2.19 3.37 1.14 1.74 192% 194% PASQUOTANK CO gp 12,000 18,876 0.86 1.50 1.368 1.368 63% 110% PERQUIMANS HERTFORD g 2,350 2,843 0.28 0.34 0.322 0.322 86% 106% INTER CO WA g 1,325 1,850 0.08 0.09 0.088 0.232 85% 39% PERQUIMANS CO g 6,469 7,000 0.60 0.68 0.697 0.697 86% 98% WINFALL g 501 520 0.05 0.05 0.1296 0.1296 39% 41% TYRRELL COLUMBIA g 900 1,200 0.09 0.11 0.398 0.398 21% 28% TYRRELL CO g 3,856 3,540 0.16 0.24 0.36 0.594 43% 40% WASHINGTON CRESWELL g 500 443 0.12 0.07 0.143 0.143 84% 47% ROPER g 669 689 0.11 0.12 0.138 0.138 80% 87% WASHINGTON CO p 5,300 7,750 0.24 0.34 0.532 1.032 45% 33% Total 93,695 137,169 14.26 21.66 17 22