Johnston County

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: Johnston County   PWSID: 03-51-070
Mailing Address:P.O. Box 2263
Smithfield, NC 27577		Ownership:County
 
Contact Person:Chandra Farmer, PETitle:Director of Utilities
Phone:919-989-5075Cell/Mobile:--
 
Secondary Contact:James Bryan Phone:919-989-5075
Mailing Address:P.O. Box 2263
Smithfield, NC 27577		Cell/Mobile:--
Distribution System
Line Type Size Range (Inches) Estimated % of lines
Asbestos Cement 16 0.23 %
Ductile Iron 4-24 9.51 %
Other 6-16 0.05 %
Polyvinyl Chloride 2-12 90.21 %
What are the estimated total miles of distribution system lines?   1,669 Miles
How many feet of distribution lines were replaced during 2019?   20 Feet
How many feet of new water mains were added during 2019?   147,747 Feet
How many meters were replaced in 2019?   275
How old are the oldest meters in this system?   26 Year(s)
How many meters for outdoor water use, such as irrigation, are not billed for sewer services?   544
What is this system's finished water storage capacity?   6.7000 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.   Yes

There are several areas of the system where water pressure has been identified as inadequate to meet fire flow demands. However, to the best of our knowledge, there are no areas inadequate to meet peak demands, excluding fire flows.

Programs
Does this system have a program to work or flush hydrants?   Yes, Monthly
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?   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?   0.8483 MGD   For how many connections?   27
Does this system have an interconnection with another system capable of providing water in an emergency?   Yes

Effective July 1, 2015, the County's increasing block rate structure started at 5,000 gallons per month for residential users. Prior to that date, the increasing block rate began at 9,000 gallons per month.

2. Water Use Information

Service Area
Sub-Basin(s)% of Service Population
Neuse River (10-1)100 %
County(s)% of Service Population
Johnston100 %
What was the year-round population served in 2019?   88,035
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 35,214 4.7175 0 0.0000
Commercial 962 0.4919 0 0.0000
Industrial 15 0.0381 0 0.0000
Institutional 30 0.0730 0 0.0000

How much water was used for system processes (backwash, line cleaning, flushing, etc.)?   2.2870 MGD

2019 average daily water withdrawal from the Neuse River = 9.74 MGD. 2019 average daily water transferred from raw water basins to water treatment plant = 9.79 MGD. 2019 average daily "out the gate" of the WTP =7.635 MGD. Therefore, the 2019 average daily "system process water" used at the WTP is 2.155 MGD. An additional approximately 0.132 MGD is used throughout the distribution system for flushing, line cleaning, etc., which makes total system process water (at plant and distribution system) = 2.287 MGD.

Of the 2.287 MGD plant process water, 0.727 MGD was discharged back to the river and 0.0656 MGD was discharged back to the County's wastewater collection system. An additional 0.129 MGD is metered for use at the water treatment plant for process and chemical mixing, etc. This leaves 1.365 MGD for losses at the WTP. The County continues to work to reduce plant and system losses. The County has a WTP Efficiency project under design to improve process controls. Furthermore, we are working to replace some on-site meters.

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
Aqua NC/ Flowers Plantation 03-51-195 0.5320 365 0.7935 2072 Yes Yes 12 Regular
Aqua/Various Subdivisions 00-00-000 0.0583 365 0.0680 2039 Yes No 4-6 Regular
Benson 03-51-025 0.0890 365 0.0900 2025 Yes Yes 16 Regular
City of Raleigh 03-92-010 0.0000 0 2.1500 2028 No Yes 16 Emergency
Clayton 03-51-020 3.9220 365 4.7500 Yes Yes 16 Regular
Fork Township Sanitary District 04-96-060 0.0000 0 0.1500 2023 Yes Yes 8 Emergency
Four Oaks 03-51-035 0.2690 365 0.3000 Yes Yes 10 Regular
Fuquay Varina 03-92-055 0.4650 365 1.5000 2020 Yes Yes 16 Regular
Kenly 03-51-030 0.1690 365 0.2950 Yes Yes 16 Regular
Micro (County Line) 40-51-008 0.0020 365 0.0050 Yes Yes 16 Regular
Pine Level 03-51-040 0.0130 365 0.0370 Yes Yes 16 Regular
Princeton 03-51-050 0.1380 365 0.1697 Yes Yes 12 Regular
Selma (County Line System) 40-51-009 0.1180 365 0.2150 Yes Yes 16 Regular
Smithfield South Water District 40-51-007 0.0540 365 0.0000 2024 Yes No 16 Regular
Town of Selma 03-51-015 0.0270 1 Yes Yes 10" Emergency
Wayne County WD 04-96-065 0.0000 0 0.2500 2023 Yes Yes 8 Regular
White Oak Plantation (CWS) 03-51-160 0.0310 365 2048 Yes Yes 8 Regular
Willowbrook Development (CWS) 03-51-166 0.0140 365 Yes 4 Regular
Winston Plantation (CWS) 40-51-002 0.0120 365 Yes 6 Regular
Winston Point (CWS) 40-51-012 0.0420 365 2048 Yes Yes 6 Regular

1. The water system labeled as "Aqua/Various Subdivisions" includes South Plantation Subdivision Phases 14 and 15, Sun Ridge Farm Subdivision and South Gate Subdivision Section 20.

2. The contract with Wayne Water Districts is a seasonal contract. Wayne can purchase water from Johnston County on a daily basis during the months of November through April. The interconnection is available all year for emergencies. Wayne County did not purchase water from Johnston County in 2019.

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 12.2710 15.8890 May 16.0170 19.9520 Sep 14.6290 17.5890
Feb 11.4410 15.6170 Jun 15.2980 17.8640 Oct 13.9520 18.8640
Mar 12.3970 15.9680 Jul 16.0850 20.1130 Nov 12.1120 17.9500
Apr 12.3720 15.9820 Aug 15.1890 19.3590 Dec 12.2420 16.8010

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
Neuse River Neuse 9.7300 365 13.8600 12.0000 F 0.0000

* 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
Neuse River Neuse 1,200 Yes Neuse River (10-1) Johnston Regular
What is this system's off-stream raw water supply storage capacity?   70 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
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
Benson 03-51-025 0.0020 365 0.0100 2025 Yes Yes 16 Regular
City of Raleigh 03-92-010 0.0180 21 2.1500 2028 Yes No 16 Emergency
City of Wilson 04-98-010 0.5096 365 1.5000 2033 No Yes 12 Regular
Fork Township SD 04-96-060 0.0000 0 0.1500 2022 Yes No 12 Emergency
Fuquay Varina 03-92-055 0.0000 0 0.0000 No Yes 16 Emergency
Harnett County RWS 03-43-045 1.1640 365 2.5000 2056 Yes Yes 12 Regular
Smithfield 03-51-010 2.3000 365 3.5000 2033 Yes Yes 16 Regular
Wayne County WD 04-96-065 0.0956 365 0.4500 2022 Yes Yes 6 Regular
Water Treatment Plants
Plant Name Permitted Capacity
(MGD)		 Is Raw Water Metered? Is Finished Water Ouput Metered? Source
Johnston County WTP 12.0000 Yes Yes Neuse River
Did average daily water production exceed 80% of approved plant capacity for five consecutive days during 2019?  No
     If yes, was any water conservation implemented?  No
Did average daily water production exceed 90% of approved plant capacity for five consecutive days during 2019?  No
     If yes, was any water conservation implemented?  No
Are peak day demands expected to exceed the water treatment plant capacity in the next 10 years?  Yes

4. Wastewater Information

Monthly Discharges
Average Daily
Discharge (MGD)		 Average Daily
Discharge (MGD)		 Average Daily
Discharge (MGD)
Jan 6.7860 May 4.9120 Sep 5.6860
Feb 7.1080 Jun 4.9660 Oct 4.8240
Mar 6.8570 Jul 5.1820 Nov 4.6630
Apr 6.8620 Aug 5.2370 Dec 5.8340

How many sewer connections does this system have?   6,296
How many water service connections with septic systems does this system have?   29,484
Are there plans to build or expand wastewater treatment facilities in the next 10 years?   Yes

The monthly values reported in Section 4 are for the County’s WWTP NPDES discharge only (NC0030716). The volume of wastewater discharged to the Town of Benson and the water discharged under permit NC0084735 (discharge at WTP) are not included in these monthly numbers.

Wastewater Permits
Permit Number Type Permitted Capacity
(MGD)		 Design Capacity
(MGD)		 Average Annual
Daily Discharge
(MGD)		 Maximum Day Discharge
(MGD)		 Receiving Stream Receiving Basin
NC0030716 9.5000 9.5000 5.7430 12.3560 Neuse River (10-1) Neuse River (10-1)
NC0084735 4.0000 4.0000 0.7270 1.7800 Neuse River Neuse River (10-1)
Wastewater Interconnections
Water System PWSID Type Average Daily Amount Contract
Maximum (MGD)
MGD Days Used
Benson 03-51-025 Discharging 0.1050 365 0.1920
Clayton 03-51-020 Receiving 0.7290 365 0.9000
Four Oaks 03-51-035 Receiving 0.1500 365 0.0000
Pine Level 03-51-040 Receiving 0.2000 365 0.0000
Selma 03-51-015 Receiving 1.1410 365 0.0000
Smithfield 03-51-010 Receiving 2.0780 365 0.0000
Winston Point (CWS) 40-51-012 Receiving 0.0680 365 0.4600

Based on Johnston County’s records, the County received 0.150 MGD from the Town of Four Oaks in 2019.

5. Planning

Projections
  2019 2020 2030 2040 2050 2060
Year-Round Population 88,035 102,588 151,839 193,459 221,965 250,750
Seasonal Population 0 0 0 0 0 0
 
Residential 4.7175 5.1600 7.5920 9.6730 11.0983 12.5375
Commercial 0.4919 0.7100 0.9400 1.0950 1.1360 1.1610
Industrial 0.0381 0.0500 0.0660 0.0770 0.0800 0.0820
Institutional 0.0730 0.0940 0.1200 0.1440 0.1500 0.1530
System Process 2.2870 2.2870 1.5000 1.7000 1.9000 2.2000
Unaccounted-for 0.2663 0.4544 0.4999 0.5498 0.6048 0.6653
Future Water Sales
Purchaser PWSID Contract Pipe Size(s) (Inches) Use Type
MGD Year Begin Year End
Various Water Systems 00-00-000 0.7500 2020 Regular
Various Watery Systems 00-00-000 4.5000 2021 Regular

The County does not have detailed (quantified) information from each system that purchases from the County. We have estimated future bulk demands from most of our bulk customers.

Future Supply Sources
Source Name PWSID Source Type Additional Supply Year Online Year Offline Type
City of Raleigh 03-92-010 Purchase 2.0000 2021 2030 Regular
City of Wilson 04-98-010 Purchase 0.4900 2021 2041 Regular
City of Wilson 04-98-010 Purchase 1.0000 2025 2050 Regular
Neuse River 03-51-070 Surface 2.0000 2020 2080 Regular
Neuse River 03-51-070 Surface 4.0000 2025 2070 Regular
Neuse River (Lower) 03-51-070 Surface 12.0000 2030 2080 Regular
Sampson County Water District I - Clinton 03-82-050 Purchase 0.1500 2020 2050 Regular
Sampson County Water District I - Clinton 03-82-050 Purchase 0.3500 2021 2050 Regular
Demand v/s Percent of Supply
  2019 2020 2030 2040 2050 2060
Surface Water Supply 12.0000 12.0000 12.0000 12.0000 12.0000 12.0000
Ground Water Supply 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Purchases 7.9600 7.9600 7.9600 6.4600 6.4600 6.4600
Future Supplies 2.1500 19.9900 19.9900 18.0000 18.0000
Total Available Supply (MGD) 19.9600 22.1100 39.9500 38.4500 36.4600 36.4600
Service Area Demand 7.8738 8.7554 10.7179 13.2388 14.9691 16.7988
Sales 5.9284 8.6262 8.6262 8.6262 8.6262 8.6262
Future Sales 0.7500 5.2500 5.2500 5.2500 5.2500
Total Demand (MGD) 13.8022 18.1316 24.5941 27.1150 28.8453 30.6750
Demand as Percent of Supply 69% 82% 62% 71% 79% 84%

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 54 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.    N/A

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

What supplies other than the ones listed in future supplies are being considered to meet your future supply needs?   Additional purchase supplies from Sampson County, Harnett County and Wilson.
Off-line reservoir construction for storage.

How does the water system intend to implement the demand management and supply planning components above?   Hazen & Sawyer is working on a Long Term Water Supply plan for the County now. Options include:
- Pursue an in-stream flow study to get additional supply from the Neuse River at the existing intake
- Construction of off-stream storage reservoir
- Potential new intake on Neuse downstream of (confluence of Swift and Middle Creek)
- Finished or raw water purchase from City of Wilson (Buckhorn reservoir)
- Indirect potable reuse

Additional Information

Has this system participated in regional water supply or water use planning?  Yes, Triangle Water Partnership

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.