Apex

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: Apex   PWSID: 03-92-045
Mailing Address:P.O. Box 250
Apex, NC 27502		Ownership:Municipality
 
Contact Person:Lori AventTitle:Water Resources Specialist
Phone:919-249-3366Cell/Mobile:919-606-6496
 
Secondary Contact:Michael Deaton Phone:919-249-3413
Mailing Address:PO Box 250
Apex, NC 27502		Cell/Mobile:919-372-7475
Distribution System
Line Type Size Range (Inches) Estimated % of lines
Asbestos Cement 6-12 1.64 %
Cast Iron 6-8 1.62 %
Ductile Iron 4-30 94.17 %
Galvanized Iron 2 0.00 %
Other 2-12 0.06 %
Polyvinyl Chloride 2-8 2.51 %
What are the estimated total miles of distribution system lines?   365 Miles
How many feet of distribution lines were replaced during 2024?   0 Feet
How many feet of new water mains were added during 2024?   65,656 Feet
How many meters were replaced in 2024?   331
How old are the oldest meters in this system?   22 Year(s)
How many meters for outdoor water use, such as irrigation, are not billed for sewer services?   1,011
What is this system's finished water storage capacity?   4.8400 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

** The 0.06% "other" line material type is made up of 0.05% copper and 0.01% brass.

Finished water storage capacity tanks: Mason Street Tank - 0.5 MG, Hunter Street Tank - 1.0 MG, Tingen Street Tank - 1.5 MG, and Apex portion of the clear well storage at the Cary/Apex Water Treatment Plant - 1.84 MG. Currently under construction is the Pleasant Park Tank - 1.5 MG with estimated completion date of June 2026.

The oldest meters in the system are pulse meters that are scheduled to be replaced in Spring 2025 through the Apex Meter Service Upgrade Project.

Programs
Does this system have a program to work or flush hydrants?   Yes, Weekly
Does this system have a valve exercise program?   Yes, Semi-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

Apex is conducting a large scale meter replacement program to upgrade town meters to new advanced metering infrastructure (AMI) system that is expected be online Spring 2025.

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

The Increasing Block tiered rate structure was instituted in 2018.

2. Water Use Information

Service Area
Sub-Basin(s)% of Service Population
Haw River (02-1)66 %
Neuse River (10-1)27 %
Cape Fear River (02-3)7 %
County(s)% of Service Population
Wake100 %
What was the year-round population served in 2024?   79,963
Has this system acquired another system since last report?   No

Relative populations served in each sub-basin is based on the total gallons consumed in each basin.

Water Use by Type
Type of Use Metered
Connections		 Metered
Average Use (MGD)		 Non-Metered
Connections		 Non-Metered
Estimated Use (MGD)
Residential 26,042 3.4800 0 0.0000
Commercial 1,469 0.9370 0 0.0000
Industrial 36 0.0500 0 0.0000
Institutional 171 0.1510 0 0.0000

How much water was used for system processes (backwash, line cleaning, flushing, etc.)?   0.8640 MGD

Bulk water sales are included in commercial as of 2022. Town metered use is classified as institutional as of 2023. All connections are metered with no un-metered water connections. System process breakdown: WTP backwash (Apex portion) = 0.8047 mgd and line flushing = 0.059 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
Feltonsville Community 03-92-060 0.0078 365 0.0140 Yes Yes 4 Regular
Harnett County 03-43-045 0.0000 0 0.0000 No No 16 Emergency
Holly Springs 03-93-050 0.0000 0 0.0000 No No 16 Emergency
Merion Subdivision 40-92-005 0.0000 0 0.0260 2030 No No 12 Emergency

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 5.5000 5.6600 May 5.9400 6.8300 Sep 5.6600 6.6900
Feb 4.9700 5.3100 Jun 7.1700 8.0600 Oct 5.7200 6.7100
Mar 5.4600 6.6600 Jul 5.9200 7.1700 Nov 5.5100 6.3800
Apr 5.9900 6.8200 Aug 6.2500 7.2500 Dec 5.4500 6.2000

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
Haw River B. Everett Jordan 5.8700 365 8.0600 10.6000 C 1,582.0000

* 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
Haw River B. Everett Jordan 1,690 Yes Haw River (02-1) Chatham Regular
What is this system's off-stream raw water supply storage capacity?   0 Million gallons
Are surface water sources monitored?   Yes, Weekly
Are you required to maintain minimum flows downstream of its intake or dam?   Yes
Does this system anticipate transferring surface water between river basins?   Yes

Apex and Cary have a joint IBT certificate to allow surface water sub-basin transfers that was modified and issued in 2015.
USACE is responsible for dam releases to maintain downstream flows.

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
Holly Springs 03-93-050 0.0000 0 0.0000 No No 16 Emergency
Water Treatment Plants
Plant Name Permitted Capacity
(MGD)		 Is Raw Water Metered? Is Finished Water Ouput Metered? Source
Cary/Apex WTP 56.0000 Yes Yes B. Everett Jordan Reservoir
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 5.6700 May 4.9000 Sep 6.0800
Feb 5.0200 Jun 4.5700 Oct 5.3000
Mar 5.7400 Jul 5.0500 Nov 4.8500
Apr 5.1000 Aug 5.6900 Dec 5.0900

How many sewer connections does this system have?   27,789
How many water service connections with septic systems does this system have?   300
Are there plans to build or expand wastewater treatment facilities in the next 10 years?   Yes

*Monthly Discharge note: The monthly discharge values are the Apex WRF, the Apex portion of the WWRWRF and the S. Cary wastewater flows combined.
*Expansion note: A study is currently underway evaluating an expansion of the Western Wake Regional WRF from 18 MGD to 24 MGD.

Wastewater Permits
Permit Number Type Permitted Capacity
(MGD)		 Design Capacity
(MGD)		 Average Annual
Daily Discharge
(MGD)		 Maximum Day Discharge
(MGD)		 Receiving Stream Receiving Basin
NC0064050 WWTP 3.6000 3.6000 1.1800 3.7000 Tributary of Middle Creek Neuse River (10-1)
NC0088846 WWTP 18.0000 18.0000 7.7400 14.1900 Cape Fear River Cape Fear River (02-3)

The reported data for permit # NC0088846 was for the facility as a whole. The Apex portion is 34% of the total capacity (6.12 mgd) and the Apex portion of the average daily flow for the WWRWRF facility is 4.05 mgd.

Wastewater Interconnections
Water System PWSID Type Average Daily Amount Contract
Maximum (MGD)
MGD Days Used
South Cary WRF 00-65-102 Discharging 0.0270 365 0.0510

Interconnect involves the Colvin Park pump station

5. Planning

Projections
  2024 2030 2040 2050 2060 2070
Year-Round Population 79,963 113,720 138,470 165,040 190,600 212,000
Seasonal Population 0 0 0 0 0 0
 
Residential 3.4800 4.9800 6.1200 7.1700 8.2800 9.2100
Commercial 0.9370 1.6200 1.9900 2.3300 2.7000 3.0000
Industrial 0.0500 0.0300 0.0400 0.0500 0.0500 0.0600
Institutional 0.1510 0.1200 0.1500 0.1800 0.2000 0.2300
System Process 0.8640 1.3502 1.6727 1.9501 2.2509 2.5217
Unaccounted-for 0.3642 0.8798 1.0873 1.2699 1.4691 1.6683

Projections are based on the 75th percentile forecast values from the Draft Triangle Area Water Partnership Regional Water Supply Plan (HDR/Hazen -2025) and from The Town of Apex Long Range Water Supply Plan (HDR - 2023).

Future Supply Sources
Source Name PWSID Source Type Additional Supply Year Online Year Offline Type
Recycled Process Water at CAWTP 03-92-045 Surface 0.7600 2030 Regular
Recycled Process Water at CAWTP 03-92-045 Surface 0.2000 2040 Regular
Recycled Process Water at CAWTP 03-92-045 Surface 0.1400 2050 Regular
Recycled Process Water at CAWTP 03-92-045 Surface 0.0600 2060 Regular
Round 5 Jordan Lake Allocation 03-92-045 Surface 6.1000 2040 Regular

1. The future round of Jordan Lake water supply storage allocation requests are based on projected demands for year 2070.
2. The additional water supply storage allocation amount is consistent with the Cary Long Range Water Resources Plan (HDR, 2025) as well as the draft Regional Water Supply Plan being developed by the Triangle Water Supply Partnership (formerly the Jordan Lake Partnership) and the Apex LRWSP (HDR, 2023).
3. Recycling of process water use at the Cary Apex WTF is included as a potential future water supply and is approximated as 10% of the forecasted Raw Water Supply up to 5 MGD. The values provided are estimated and reflect 77% of the potential recovery based on Cary’s ownership share of CAWTF.

Demand v/s Percent of Supply
  2024 2030 2040 2050 2060 2070
Surface Water Supply 10.6000 10.6000 10.6000 10.6000 10.6000 10.6000
Ground Water Supply 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Purchases 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
Future Supplies 0.7600 7.0600 7.2000 7.2600 7.2600
Total Available Supply (MGD) 10.6000 11.3600 17.6600 17.8000 17.8600 17.8600
Service Area Demand 5.8462 8.9800 11.0600 12.9500 14.9500 16.6900
Sales 0.0078 0.0140 0.0140 0.0140 0.0140 0.0140
Future Sales 0.0000 0.0000 0.0000 0.0000 0.0000
Total Demand (MGD) 5.8540 8.9940 11.0740 12.9640 14.9640 16.7040
Demand as Percent of Supply 55% 79% 63% 73% 84% 94%

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 44 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.    The Apex Long Range Water Resources Plan was updated in 2023 and includes an evaluation of water conservation programs with considerations and recommendations.

Are there other demand management practices you will implement to reduce your future supply needs?   The Apex LRWRP was updated in 2023 by HDR and includes an evaluation of water conservation programs with considerations and recommendations such as utilizing reclaimed water to reduce drinking water demand and encouraging water-efficient landscaping choices such as xeriscaping and drought-tolerant plant selection.

What supplies other than the ones listed in future supplies are being considered to meet your future supply needs?   The Apex Long Range Water Resources Plan and the Triangle Water Partnership Regional Water Supply Plan Draft includes an evaluation of water supply alternatives including a phase IV WTP expansion and considering future potential sources.

How does the water system intend to implement the demand management and supply planning components above?   Apex has committed to a regional approach for water demand management and supply planning by partnering with the towns of Cary and Morrisville to implement our Long Range Water Resources Plan which encompasses supply, demand, conservation, etc. The plan also encompasses strategies for potential water capacities, implementation requirements, regulatory considerations, policy implications, and general practices. Apex is also a member of The Central Pines Triangle Water Supply Partnership for long range demand and supply planning with other regional entities.

Additional Information

Has this system participated in regional water supply or water use planning?  Yes, Yes. Apex is currently participating in the Central Pines Triangle Water Partnership Regional Water Supply Plan that is partnered with HDR, Hazen and regional utilities throughout the Triangle and surrounding areas.

What major water supply reports or studies were used for planning?  The Town of Apex Long Range Water Supply Plan (HDR - 2023), The Triangle Water Partnership Regional Water Supply Plan Draft Apex forecast (HDR and Hazen 2024) and the Cary Long Range Water Supply Plan (HDR - 2025).

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.