Ocracoke Sanitary District

The Division of Water Resources (DWR) provides the data contained within this Local Water Supply Plan (LWSP) as a courtesy and service to our customers. DWR staff does not field verify data. Neither DWR, nor any other party involved in the preparation of this LWSP attests that the data is completely free of errors and omissions. Furthermore, data users are cautioned that LWSPs labeled PROVISIONAL have yet to be reviewed by DWR staff. Subsequent review may result in significant revision. Questions regarding the accuracy or limitations of usage of this data should be directed to the water system and/or DWR.

1. System Information

Contact Information

Complete

Water System Name: Ocracoke Sanitary District   PWSID: 04-48-020
Mailing Address:P.O. Box 567
Ocracoke, NC 27960		Ownership:District
 
Contact Person:Earl H. GaskinsTitle:Plant and Systems Manager
Phone:252-928-5791Cell/Mobile:--
 
Secondary Contact:Janie M. Garrish Phone:252-928-5791
Mailing Address:P. O. Box 567
Ocracoke, NC 27960-0567		Cell/Mobile:--
Distribution System
Line Type Size Range (Inches) Estimated % of lines
Polyvinyl Chloride 2-10 100.00 %
What are the estimated total miles of distribution system lines?   13 Miles
How many feet of distribution lines were replaced during 2024?   0 Feet
How many feet of new water mains were added during 2024?   0 Feet
How many meters were replaced in 2024?   15
How old are the oldest meters in this system?   11 Year(s)
How many meters for outdoor water use, such as irrigation, are not billed for sewer services?   0
What is this system's finished water storage capacity?   0.5500 Million Gallons
Has water pressure been inadequate in any part of the system since last update? Line breaks that were repaired quickly should not be included.   No
Programs
Does this system have a program to work or flush hydrants?   Yes, Semi-Annually
Does this system have a valve exercise program?   Yes, Annually
Does this system have a cross-connection program?   Yes
Does this system have a program to replace meters?   Yes
Does this system have a plumbing retrofit program?   Yes
Does this system have an active water conservation public education program?   No
Does this system have a leak detection program?   Yes

Line inspection, comparison of monthly consumption to monthly production

Water Conservation
What type of rate structure is used?   Increasing Block
How much reclaimed water does this system use?   0.0000 MGD   For how many connections?   0
Does this system have an interconnection with another system capable of providing water in an emergency?   No

Ocracoke Island is off the coast of NC and we are accessible only by ferry. (Atlantice Ocean of one side, Pamlico Sound on the other and Hatteras Inlet and Ocracoke Inlet on either end. There is NO feasible way to physically connect to any other water system

2. Water Use Information

Service Area
Sub-Basin(s)% of Service Population
Pamlico River & Sound (15-3)100 %
County(s)% of Service Population
Hyde100 %
What was the year-round population served in 2024?   900
What was the seasonal population and months served in 2024? (if applicable)   16,000 ( Apr May Jun Jul Aug Sep Oct )
Has this system acquired another system since last report?   No
Water Use by Type
Type of Use Metered
Connections		 Metered
Average Use (MGD)		 Non-Metered
Connections		 Non-Metered
Estimated Use (MGD)
Residential 1,142 0.0789 0 0.0000
Commercial 172 0.0260 0 0.0000
Industrial 0 0.0000 0 0.0000
Institutional 15 0.0101 0 0.0000

How much water was used for system processes (backwash, line cleaning, flushing, etc.)?   0.1595 MGD

Ocracoke Sanitary District system process water is reject water from the Reverse Osmosis plant which has 65% recovery rate for every
100 gallons pumped from wells, this can vary slightly.

3. Water Supply Sources

Monthly Withdrawals & Purchases
Average Daily
Use (MGD)		 Max Day
Use (MGD)		 Average Daily
Use (MGD)		 Max Day
Use (MGD)		 Average Daily
Use (MGD)		 Max Day
Use (MGD)
Jan 0.2102 0.7190 May 0.3250 0.5030 Sep 0.3754 0.5600
Feb 0.1692 0.2680 Jun 0.4305 0.5310 Oct 0.3418 0.4580
Mar 0.2050 0.3230 Jul 0.4536 0.6600 Nov 0.2316 0.3170
Apr 0.2979 0.4050 Aug 0.4358 0.6850 Dec 0.1849 0.2830

Ocracoke Sanitary District has 3 deep wells, but only use one at a time and usually only one per day but if plant has to run twice in on day
may run on different well second time.

Ground Water Sources
Name or Number Average Daily Withdrawal (MGD) Max Day Withdrawal (MGD) 12-Hour Supply
(MGD)		 CUA Reduction Year Offline Use Type
MGD Days Used
1 0.0000 0 0 0.4320 Regular
2 0.3060 156 0.7200 Regular
3 0.3037 211 0.7200 Regular
Ground Water Sources (continued)
Name or Number Well Depth (Feet) Casing Depth
(Feet)		 Screen Depth (Feet) Well Diameter (Inches) Pump Intake Depth (Feet) Metered?
Top Bottom
1 622 603 603 622 8 40 Yes
2 640 605 605 640 10 80 Yes
3 622 602 602 622 10 80 Yes
Are ground water levels monitored?   No,
Does this system have a wellhead protection program?   Yes

Well #1 is active but not used often because it will only run part of the plant due to pipe size and flow

Water Treatment Plants
Plant Name Permitted Capacity
(MGD)		 Is Raw Water Metered? Is Finished Water Ouput Metered? Source
Ocracoke Sanitary District 0.8500 Yes Yes Well #1, #2 & #3Castle Hayne Aquifer.
Did average daily water production exceed 80% of approved plant capacity for five consecutive days during 2024?  No
     If yes, was any water conservation implemented?  
Did average daily water production exceed 90% of approved plant capacity for five consecutive days during 2024?  No
     If yes, was any water conservation implemented?  
Are peak day demands expected to exceed the water treatment plant capacity in the next 10 years?  No

4. Wastewater Information

Monthly Discharges
Average Daily
Discharge (MGD)		 Average Daily
Discharge (MGD)		 Average Daily
Discharge (MGD)
Jan 0.1254 May 0.1816 Sep 0.2321
Feb 0.1024 Jun 0.2303 Oct 0.2085
Mar 0.1289 Jul 0.2374 Nov 0.1316
Apr 0.1815 Aug 0.2563 Dec 0.1094

How many sewer connections does this system have?   0
How many water service connections with septic systems does this system have?   1,329
Are there plans to build or expand wastewater treatment facilities in the next 10 years?   No
Wastewater Permits
Permit Number Type Permitted Capacity
(MGD)		 Design Capacity
(MGD)		 Average Annual
Daily Discharge
(MGD)		 Maximum Day Discharge
(MGD)		 Receiving Stream Receiving Basin
NC0041530 WTP 0.4500 0.0000 0.1770 0.5000 Pamlico Sound Pamlico River & Sound (15-3)

5. Planning

Projections
  2024 2030 2040 2050 2060 2070
Year-Round Population 900 900 910 905 915 915
Seasonal Population 16,000 16,000 16,500 16,500 16,000 16,500
 
Residential 0.0789 0.0500 0.0510 0.0500 0.0510 0.0510
Commercial 0.0260 0.0497 0.0497 0.0495 0.0496 0.0496
Industrial 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Institutional 0.0101 0.0100 0.0100 0.0100 0.0100 0.0100
System Process 0.1595 0.1300 0.1300 0.1300 0.1300 0.1300
Unaccounted-for 0.0310 0.0250 0.0250 0.0260 0.0230 0.0230
Demand v/s Percent of Supply
  2024 2030 2040 2050 2060 2070
Surface Water Supply 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Ground Water Supply 1.8720 1.8720 1.8720 1.8720 1.8720 1.8720
Purchases 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Future Supplies 0.0000 0.0000 0.0000 0.0000 0.0000
Total Available Supply (MGD) 1.8720 1.8720 1.8720 1.8720 1.8720 1.8720
Service Area Demand 0.3055 0.2647 0.2657 0.2655 0.2636 0.2636
Sales 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Future Sales 0.0000 0.0000 0.0000 0.0000 0.0000
Total Demand (MGD) 0.3055 0.2647 0.2657 0.2655 0.2636 0.2636
Demand as Percent of Supply 16% 14% 14% 14% 14% 14%

The purpose of the above chart is to show a general indication of how the long-term per capita water demand changes over time. The per capita water demand may actually be different than indicated due to seasonal populations and the accuracy of data submitted. Water systems that have calculated long-term per capita water demand based on a methodology that produces different results may submit their information in the notes field.

Your long-term water demand is 88 gallons per capita per day. What demand management practices do you plan to implement to reduce the per capita water demand (i.e. conduct regular water audits, implement a plumbing retrofit program, employ practices such as rainwater harvesting or reclaimed water)? If these practices are covered elsewhere in your plan, indicate where the practices are discussed here.    

Are there other demand management practices you will implement to reduce your future supply needs?   

What supplies other than the ones listed in future supplies are being considered to meet your future supply needs?   Ocracoke Sanitary District is in the process through aging infrastructure grant of replacing all fire hydrants, and replacing our elevated tank that
was built in late 1976 - early 1977. We have also had two of nine Reverse Osmosis units filters replaced which will increase production.

How does the water system intend to implement the demand management and supply planning components above?   

Additional Information

Has this system participated in regional water supply or water use planning?  No

What major water supply reports or studies were used for planning?  

Please describe any other needs or issues regarding your water supply sources, any water system deficiencies or needed improvements (storage, treatment, etc.) or your ability to meet present and future water needs. Include both quantity and quality considerations, as well as financial, technical, managerial, permitting, and compliance issues:   

The Division of Water Resources (DWR) provides the data contained within this Local Water Supply Plan (LWSP) as a courtesy and service to our customers. DWR staff does not field verify data. Neither DWR, nor any other party involved in the preparation of this LWSP attests that the data is completely free of errors and omissions. Furthermore, data users are cautioned that LWSPs labeled PROVISIONAL have yet to be reviewed by DWR staff. Subsequent review may result in significant revision. Questions regarding the accuracy or limitations of usage of this data should be directed to the water system and/or DWR.