Oak Island

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: Oak Island   PWSID: 04-10-020
Mailing Address:4601 E. Oak Island Dr.
Oak Island, NC 28465		Ownership:Municipality
 
Contact Person:Scott HaasTitle:Water Superintendent
Phone:910-523-0437Cell/Mobile:--
Distribution System
Line Type Size Range (Inches) Estimated % of lines
Asbestos Cement 4-14 95.00 %
Polyvinyl Chloride 2-6 5.00 %
What are the estimated total miles of distribution system lines?   120 Miles
How many feet of distribution lines were replaced during 2025?   0 Feet
How many feet of new water mains were added during 2025?   0 Feet
How many meters were replaced in 2025?   900
How old are the oldest meters in this system?   32 Year(s)
How many meters for outdoor water use, such as irrigation, are not billed for sewer services?   1,411
What is this system's finished water storage capacity?   1.1000 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, 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?   No
Does this system have a plumbing retrofit program?   No
Does this system have an active water conservation public education program?   Yes
Does this system have a leak detection program?   Yes
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?   Yes

2. Water Use Information

Service Area
Sub-Basin(s)% of Service Population
Shallotte River (09-4)50 %
Cape Fear River (02-3)50 %
County(s)% of Service Population
Brunswick100 %
What was the year-round population served in 2025?   9,855
What was the seasonal population and months served in 2025? (if applicable)   50,000 ( Jun Jul Aug )
Has this system acquired another system since last report?   No

Uploaded map in 2018 working on our GIS based map currently

Water Use by Type
Type of Use Metered
Connections		 Metered
Average Use (MGD)		 Non-Metered
Connections		 Non-Metered
Estimated Use (MGD)
Residential 12,131 1.2389 0 0.0000
Commercial 203 0.0268 0 0.0000
Industrial 0 0.0000 0 0.0000
Institutional 0 0.0000 0 0.0000

How much water was used for system processes (backwash, line cleaning, flushing, etc.)?   0.0010 MGD

System process, town has 69 auto flushing devices on dead end streets with adjustable timers for improved water quality.

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 0.8587 May 1.5774 Sep 1.5717
Feb 0.7407 Jun 1.9281 Oct 1.2822
Mar 0.8684 Jul 2.2281 Nov 1.0778
Apr 1.3341 Aug 1.7385 Dec 0.7844

Water Purchases From Other Systems
Seller PWSID Average
Daily Purchased
(MGD)		 Days
Used		 Contract Required to
comply with water
use restrictions?		 Pipe Size(s)
(Inches)		 Use
Type
MGD Expiration Recurring
Brunswick County 04-10-045 1.3357 365 3.0000 2061 Yes Yes 12,16 Regular

4. Wastewater Information

Monthly Discharges
Average Daily
Discharge (MGD)		 Average Daily
Discharge (MGD)		 Average Daily
Discharge (MGD)
Jan 0.6622 May 0.8753 Sep 0.7982
Feb 0.7010 Jun 1.1130 Oct 0.8012
Mar 0.7580 Jul 1.1816 Nov 0.6591
Apr 0.7843 Aug 1.0495 Dec 0.6395

How many sewer connections does this system have?   10,923
How many water service connections with septic systems does this system have?   125
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
WQ0005790 WWTP 0.4000 0.4000 0.0000 Non - Discharge Cape Fear River (02-3)
WQ0031857 WWTP 0.4000 0.4000 0.0000 Non Discharge Cape Fear River (02-3)
Wastewater Interconnections
Water System PWSID Type Average Daily Amount Contract
Maximum (MGD)
MGD Days Used
Brunswick County 04-10-045 Discharging 0.8367 365 3.0000
Town Of Caswell Beach 04-10-055 Receiving 0.0683 365 0.2000

5. Planning

Projections
  2025 2030 2040 2050 2060 2070
Year-Round Population 9,855 11,700 12,900 14,100 15,300 16,500
Seasonal Population 50,000 50,000 50,000 50,000 50,000 50,000
 
Residential 1.2389 1.4000 1.6000 1.8000 2.0000 2.2000
Commercial 0.0268 0.0650 0.0700 0.0750 0.0800 0.0850
Industrial 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Institutional 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
System Process 0.0010 0.0000 0.0000 0.0000 0.0000 0.0000
Unaccounted-for 0.0690 0.0750 0.0800 0.0850 0.0900 0.0950
Demand v/s Percent of Supply
  2025 2030 2040 2050 2060 2070
Surface Water Supply 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Ground Water Supply 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Purchases 3.0000 3.0000 3.0000 3.0000 3.0000 3.0000
Future Supplies 0.0000 0.0000 0.0000 0.0000 0.0000
Total Available Supply (MGD) 3.0000 3.0000 3.0000 3.0000 3.0000 3.0000
Service Area Demand 1.3357 1.5400 1.7500 1.9600 2.1700 2.3800
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) 1.3357 1.5400 1.7500 1.9600 2.1700 2.3800
Demand as Percent of Supply 45% 51% 58% 65% 72% 79%

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 126 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?   Customer information practices, yearly citizen workshops.

What supplies other than the ones listed in future supplies are being considered to meet your future supply needs?   Brunswick county to supply all Town of Oak Island water needs.

How does the water system intend to implement the demand management and supply planning components above?   Town of Oak Island contract with Brunswick County to supply all water needs.

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:   Town of Oak Island is working with WK Dixon for Water System Storage tank improvements project.

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.