Harnett Regional Water System

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

Provisional

Water System Name: Harnett Regional Water System   PWSID: 03-43-045
Mailing Address:P. O. Box 1119
Lillington, NC 27546		Ownership:County
 
Contact Person:Allan O'BriantTitle:Water Plant Supervisor
Phone:910-893-7575Cell/Mobile:910-984-6894
 
Secondary Contact:Tommy Burns Phone:910-814-3042
Mailing Address:P. O. Box 1119
Lillington, NC 27546		Cell/Mobile:910-658-7107
Distribution System
Line Type Size Range (Inches) Estimated % of lines
Asbestos Cement 6-16 0.35 %
Ductile Iron 4-36 7.27 %
Polyvinyl Chloride 2-16 92.38 %
What are the estimated total miles of distribution system lines?   1,584 Miles
How many feet of distribution lines were replaced during 2025?   35,550 Feet
How many feet of new water mains were added during 2025?   153,120 Feet
How many meters were replaced in 2025?   113
How old are the oldest meters in this system?   25 Year(s)
How many meters for outdoor water use, such as irrigation, are not billed for sewer services?   318
What is this system's finished water storage capacity?   24.8000 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

Feet of new water lines - used 2025 total miles of water line 1584 - 2024 total miles of water line 1555 = 29 miles new water line.
29 miles x 5,280 ft/mile = 153,120.

Finish Water Storage Capacity does not include a 3.0-million-gallon Clearwell at the water plant, because this is a chlorine contact chamber for Free Chlorine Contact Time (CT) and it's effluent still needs additional treatment.

Installed 2623 new meters and Replaced 113 meters.
Finished Water Storage changed from last year's report b/c WC-Tnk-1 is 250,000 vs the incorrect 300,000 gallons

Programs
Does this system have a program to work or flush hydrants?   Yes, Semi-Annually
Does this system have a valve exercise program?   Yes, As Needed
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?   No
Does this system have an active water conservation public education program?   No
Does this system have a leak detection program?   No

Hydrants and Blow-offs are worked and flushed by HRW Water Quality Technician Staff with emphasis on dead ends, low usage areas they
have on a monthly, bi-monthly or quarterly flush schedule. Each Fire District also inspects, test and flush hydrants for insurance rating and
maintaining availability in fire suppression emergencies. Hydrant issues are reported by Fire Departments to Harnett Regional Water for
repairs.

Harnett Regional Water completed its system wide meter change over to AMI water meters in 2024.

Water Conservation
What type of rate structure is used?   Uniform
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

Interconnections and agreements with surrounding water systems will provide limited supply to our water distribution system due to the large
Harnett Regional Water System coverage area which contains 1584.43 miles of distribution pipelines. This area covers all of Harnett County
except the Town of Dunn. We also supply to Consecutive Water Systems outside of Harnett County, these include Fort Bragg Military Base,
Holly Springs, Fuquay-Varina, Spring Lake, Johnston County & East Moore District.

2. Water Use Information

Service Area
Sub-Basin(s)% of Service Population
Cape Fear River (02-3)85 %
South River (02-4)15 %
County(s)% of Service Population
Harnett80 %
Wake12 %
Cumberland8 %
What was the year-round population served in 2025?   116,892
Has this system acquired another system since last report?   No


No major changes on Distribution System and would like to keep the System Map submitted last year.

Water Use by Type
Type of Use Metered
Connections		 Metered
Average Use (MGD)		 Non-Metered
Connections		 Non-Metered
Estimated Use (MGD)
Residential 47,810 6.0924 0 0.0000
Commercial 894 0.5527 0 0.0000
Industrial 13 0.0165 0 0.0000
Institutional 37 0.1033 0 0.0000

How much water was used for system processes (backwash, line cleaning, flushing, etc.)?   1.4704 MGD

How System Process Daily Average is calculated = NPDES metering outfall is a total of the filter backwashing, filter to waste, GAC filter washes
if on-line and Pulsator sludge blowdown decanting that I called the Combined Daily Average = 1.2771 + Plant process daily average = 0.0659 +
Distribution Flushing daily average = 0.0147 + PAC tower makeup water metering daily average = 0.0013 + Polymer carrying water (Process &
Sludge) daily average = 0.0230 + Liquid sludge transfer to North Harnett Regional WWTP for centrifuging daily average = 0.0884.



System Process Daily Average = 1.4704 MGD

Water Sales
Purchaser PWSID Average
Daily Sold
(MGD)		 Days
Used		 Contract Required to
comply with water
use restrictions?		 Pipe Size(s)
(Inches)		 Use
Type
MGD Expiration Recurring
Angier 03-43-015 0.7935 365 1.4400 2059 Yes Yes 16 Regular
Bragg Comm./NTA Water System 50-43-001 0.2600 365 0.8000 2053 Yes Yes 16 Regular
Campbell University 03-43-030 0.0762 365 0.2500 2013 Yes Yes 20 Regular
Coats 03-43-020 0.1608 365 0.3000 2017 Yes Yes 12 Regular
Dunn 03-43-010 0.0000 0 0.2500 Yes No 12 Emergency
East Moore Water District 50-63-011 1.6220 365 3.0000 2042 Yes Yes 16 Regular
Fort Bragg Water System 50-26-019 3.2596 183 4.0000 2046 Yes Yes 24 Regular
Fuquay Varina 03-92-055 1.9826 365 4.0000 2032 Yes Yes 12&36 Regular
Holly Springs 03-92-050 3.7521 365 10.0000 2048 Yes Yes 36 Regular
Johnston County 03-51-070 1.1328 365 2.5000 2056 Yes Yes 12&12 Regular
Lillington 03-43-025 0.4891 365 2.0000 2017 Yes Yes 16 Regular
Linden 03-26-045 0.1484 365 0.2500 2031 Yes Yes 6 Regular
Spring Lake 03-26-020 0.3315 365 0.5000 2006 Yes Yes 8 Regular
Woodlake 03-63-114 0.1473 365 0.1400 1999 Yes Yes 6 Regular

We supply Fort Bragg on an alternating arrangement with Public Works Commission (PWC), thus the 183 days used. Fort Bragg yearly average
1.6298 x 2 = 3.2596 MGD to represent the daily demand supplied every day that we pump to them.

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 22.1331 26.4261 May 24.3211 30.7761 Sep 25.9581 29.8361
Feb 21.1501 23.8061 Jun 25.8251 32.4161 Oct 24.4561 26.7861
Mar 22.0231 24.4561 Jul 25.9811 31.1161 Nov 22.1811 24.0161
Apr 23.6801 27.0361 Aug 25.4561 27.9961 Dec 23.1031 26.2561


The System Average Daily and System Maximum Day above includes the Dunn average purchase of 0.0261 MGD.
2025 Year WTP Annual Average Production is 23,845,671.23 = 23.846 MGD and WTP Maximum Day was June 25th = 32.390 MGD.



The following Maximum Day Demands are WTP Production numbers.
Highest Annual 3 Day Maximum was 30.610 MGD - June 24th to June 26th.
Highest Annual 5 Day Maximum was 30.134 MGD - June 23rd to June 27th.
2025 Monthly High 3 Day for: May= 28.027 MGD, June = 30.610 MGD, July = 30.383 MGD, August = 27.950 MGD & September = 28.880 MGD

Surface Water Sources
Stream Reservoir Average Daily Withdrawal Maximum Day
Withdrawal (MGD)		 Available Raw
Water Supply		 Usable On-Stream
Raw Water Supply
Storage (MG)
MGD Days Used MGD * Qualifier
Cape Fear River Harnett County WTP Reservoir 23.8460 365 32.3900 42.0000 T 61.0000

* Qualifier: C=Contract Amount, SY20=20-year Safe Yield, SY50=50-year Safe Yield, F=20% of 7Q10 or other instream flow requirement, CUA=Capacity Use Area Permit

Surface Water Sources (continued)
Stream Reservoir Drainage Area
(sq mi)		 Metered? Sub-Basin County Year
Offline		 Use
Type
Cape Fear River Harnett County WTP Reservoir 3,464 Yes Cape Fear River (02-3) Harnett Regular
What is this system's off-stream raw water supply storage capacity?   61 Million gallons
Are surface water sources monitored?   Yes, Daily
Are you required to maintain minimum flows downstream of its intake or dam?   No
Does this system anticipate transferring surface water between river basins?   Yes

Cape Fear River average daily withdrawal is the 2025 12-month WIMS Annual Local Water Supply Flow Report using Monthly Total Raw MGD
Treated, which is the East & West Pulsator Train flow meters.

2025 annual withdrawal average is 8,703,670,000 / 365 days per year = 23,845,671.23 ~ 23.846 MGD.
2025 annual withdrawal with purchases is 8,703,670,000 + 9,198,000 Dunn = 8,712,868,000 gallons / 365 days per year = 23,870,871.23 =
23.871 MGD

The USGS low flow analysis for the Sanford WTP expansion project annual 7Q10 flow at Lillington River gauge is 288 CFS.
This low flow study is for 2007 to 2022. For 20% for 7Q10 ~ 288 cubic feet per second/1.5472gal per second conversion to MG = 186.1427 MG
and then 20% of 186.1427 MG = 37.228.

Harnett County Regional WTP production rating is 42.000 MGD.

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
Apex 03-92-045 0.0000 0 0.0000 Yes 12 Emergency
Cary 03-92-020 0.0000 0 0.0000 Yes 12 Emergency
Dunn 03-43-010 0.0261 365 1.0000 2050 Yes Yes 16 Regular
Fuquay Varina 03-92-055 0.0000 0 1.3000 2029 Yes Yes 12 Emergency
Holly Springs 03-92-050 0.0000 0 1.0000 2041 Yes Yes 12 Emergency
Johnston County 03-51-070 0.0000 0 3.9000 Yes Yes 12 Emergency
Raleigh 03-92-010 0.0000 0 2.0000 Yes Yes 12 Emergency
Smithfield 03-51-010 0.0000 0 0.0000 Yes Yes 12 Emergency

Dunn Water System 03-43-010 is the only system that we purchase water from daily.

Water Treatment Plants
Plant Name Permitted Capacity
(MGD)		 Is Raw Water Metered? Is Finished Water Ouput Metered? Source
Harnett County Regional WTP 42.0000 Yes Yes Cape Fear River
Did average daily water production exceed 80% of approved plant capacity for five consecutive days during 2025?  No
     If yes, was any water conservation implemented?  
Did average daily water production exceed 90% of approved plant capacity for five consecutive days during 2025?  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?  Yes

Permitted WTP Capacity is 42.000 MGD. 80% WTP Capacity = 33.800 MGD & 90% WTP Capacity = 37.800.

Maximum Day Demand 2025 was 32.4161 MGD on June 25th = HCRWTP (32.390) + Dunn purchase (0.0261)

May - High 3 Day & 5 Day average at WTP = 28.027 19th-21st & 27.380 19th-23rd
June - High 3 Day & 5 Day average at WTP = 30.610 24th-26th & 30.134 23rd-27th
July - High 3 Day & 5 Day average at WTP = 30.383 27th-29th & 29.904 25th-29th
Aug - High 3 Day & 5 Day average at WTP = 27.950 27th-29th & 27.940 25th-29th
Sept - High 3 Day & 5 Day average at WTP = 28.880 3rd-5th & 28.512 1st-5th

4. Wastewater Information

Monthly Discharges
Average Daily
Discharge (MGD)		 Average Daily
Discharge (MGD)		 Average Daily
Discharge (MGD)
Jan 9.0470 May 9.9030 Sep 8.7070
Feb 10.3240 Jun 10.0480 Oct 8.7300
Mar 11.3900 Jul 10.5860 Nov 8.7500
Apr 10.1330 Aug 11.6330 Dec 8.9070

How many sewer connections does this system have?   16,289
How many water service connections with septic systems does this system have?   32,435
Are there plans to build or expand wastewater treatment facilities in the next 10 years?   Yes

North Harnett Regional Wastewater Treatment Plant (NHRWWTP) is currently expanding from 7.500 MGD to 16.500 MGD. Notice to Proceed issued March 18, 2024. NHRWWTP Construction is well underway with 50% completion.
End of August 2025 to end of December 2025 - little rain so drought conditions. From graph can see this sharp drop in August because of low Inflow and Infiltration (I&I).

Wastewater Permits
Permit Number Type Permitted Capacity
(MGD)		 Design Capacity
(MGD)		 Average Annual
Daily Discharge
(MGD)		 Maximum Day Discharge
(MGD)		 Receiving Stream Receiving Basin
NC0007684 WTP 42.0000 42.0000 1.2770 2.3230 Cape Fear River Cape Fear River (02-3)
NC0021636 WWTP 7.5000 7.5000 4.8560 11.4810 Cape Fear River Cape Fear River (02-3)
NC0088366 WWTP 15.0000 15.0000 4.9900 7.7540 Lower Little River Cape Fear River (02-3)
Wastewater Interconnections
Water System PWSID Type Average Daily Amount Contract
Maximum (MGD)
MGD Days Used
Angier 03-43-015 Receiving 0.8761 365 1.0800
Fort Liberty Water System 50-26-019 Receiving 3.3922 365 10.0000
Fuquay-Varina 03-92-055 Receiving 1.7023 365 2.6000
Liberty Comm./NTA Water System 50-43-001 Receiving 0.2872 365 0.8000
Lillington 03-43-025 Receiving 0.6417 365 1.2000


13th year receiving Wastewater discharge from Fort Bragg Water System. This flow is treated by the South Harnett Regional WWTP.

5. Planning

Projections
  2025 2030 2040 2050 2060 2070
Year-Round Population 116,892 124,177 140,983 157,598 174,158 190,818
Seasonal Population 0 0 0 0 0 0
 
Residential 6.0924 6.8297 7.7541 8.6679 9.5787 10.4950
Commercial 0.5527 0.6102 0.7438 0.9068 1.1053 1.3474
Industrial 0.0165 0.0173 0.0192 0.0212 0.0234 0.0258
Institutional 0.1033 0.1086 0.1199 0.1325 0.1463 0.1616
System Process 1.4704 1.5454 1.7071 1.8857 2.0830 2.3009
Unaccounted-for 3.1062 3.4404 3.9060 4.3856 4.8850 5.4114

Population Served = used NC State Office of Budget and Management - Harnett County projects at 80% since do not supply Dunn &
population with their own wells.
Residential - Used 55 gallons per day per capita times the population served number.
Commercial - used 2% growth, Industrial used 1% growth, Institutional used 1% growth & System Process - used 1% growth.
Formula used = Present value (1+%growth) exponent number of years

Residential = (2023) 5.7396 (2024) 6.1699 & (2025) 6.0924
Commercial = (2023) 0.5036 (2024) 0.5638 & (2025) 0.5527
Industrial = (2023) 0.0198 (2024) 0.0189 & (2025) 0.0165
Institutional = (2023) 0.1259 (2024) 0.1347 & (2025) 0.1033
System Process = (2023) 1.2998 (2024) 1.1899 & (2025) 1.4704

Future Water Sales
Purchaser PWSID Contract Pipe Size(s) (Inches) Use Type
MGD Year Begin Year End
Angier 03-43-015 1.0000 2030 2070 Regular
Future Supply Sources
Source Name PWSID Source Type Additional Supply Year Online Year Offline Type
Cape Fear River 00-00-000 Surface 18.0000 2030 Regular

Preliminary Engineers Report (PER) is being completed for new Water Treatment Plant on the Cape Fear River in Erwin.

Demand v/s Percent of Supply
  2025 2030 2040 2050 2060 2070
Surface Water Supply 42.0000 42.0000 42.0000 42.0000 42.0000 42.0000
Ground Water Supply 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Purchases 1.0000 1.0000 1.0000 1.0000 1.0000 1.0000
Future Supplies 18.0000 18.0000 18.0000 18.0000 18.0000
Total Available Supply (MGD) 43.0000 61.0000 61.0000 61.0000 61.0000 61.0000
Service Area Demand 11.3415 12.5516 14.2501 15.9997 17.8217 19.7421
Sales 12.5306 29.1873 29.1873 29.1873 29.1873 29.1873
Future Sales 1.0000 1.0000 1.0000 1.0000 0.0000
Total Demand (MGD) 23.8721 42.7389 44.4374 46.1870 48.0090 48.9294
Demand as Percent of Supply 56% 70% 73% 76% 79% 80%

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 52 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.     Harnett Regional Water (HRW) has completed its conversion to Automatic Meter Reading (AMR) system for the distribution customers. This
system has capability to alert us of customer high demands - possible customer side meter leaks, running toilet etc. Customers can sign up to
use the AMR system to get notification of water usage to monitor their household usage.

Are there other demand management practices you will implement to reduce your future supply needs?    Future conservation could be the implementation of an active Water Conservation Public Education Program.

What supplies other than the ones listed in future supplies are being considered to meet your future supply needs?    A possibility for the way in the future to supply the southern and Fort Bragg part of the Harnett Regional Water grid is to build a Water
Treatment Facility on the Upper or Lower Little River.

How does the water system intend to implement the demand management and supply planning components above?    Harnett Regional Water is currently updating its Hydraulic Model (Hazen & Sawyer) to facilitate and use for future distribution system
upgrades and planning.

Additional Information

Has this system participated in regional water supply or water use planning?  Yes, Harnett Regional Water is a member of the Triangle Water Supply Partnership.

What major water supply reports or studies were used for planning?   Have used the previous Hydraulic Model study to make improvements in the distributions system - primarily the easily implemented and low
cost improvements were incorporated. Currently updating the distribution hydraulic model.

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:    Have plans for 1-million-gallon tank at Hwy 401 & Christian Light Road on the 36-inch line that pumps from Water Plant to the 5.3 MG Wake
County Ground Storage Tank that supply Holly Springs, Fuquay-Varina and feeds the Northwest Booster Pump Station. This new tank will have
a new pump station also.
Northwest District has only one tank in a fast-growing area of county and Northwest Booster Station 1 has difficulty in summer or periods
when filling after big leaks and must refill tank from low levels.

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.