Dear Hydrant Meter Customers,

Out of an abundance of caution, Loudoun Water’s offices in Ashburn is closed to the public, temporarily suspending all walk-ins for the hydrant meter program. While the office is closed the program is still available by appointment only, please contact Loudoun Water Customer Relations by phone, 571-291-7880 or by email, to schedule an appointment with Loudoun Water staff.

If you have a meter due for calibration or a truck to be inspected, you will be given additional time to coordinate with Loudoun Water staff to bring your meter or truck into our offices. During this time, your hydrant meter account will not accrue any penalties or fees. 

If you have a critical need to access water using a hydrant meter for purposes of construction, feel you have a hydrant meter emergency, would like to final bill your hydrant meter account, or if you have a meter currently in our office, please contact Loudoun Water Customer Relations by phone, 571-291-7880 or by email, to schedule an appointment with Loudoun Water staff.


The first step in accessing a hydrant is to obtain a permit for a hydrant meter. This needs to be done in-person at the Loudoun Water Dale C Hammes Administration Building in Ashburn. 

The following is needed when obtaining a permit:

  • a valid, state-issued identification card (i.e. a driver's license)
  • a business card (including the company name and the name of the person picking up the hydrant meter)
  • a business license - Virginia or Loudoun County
  • Copy of your Federal Tax Identification number (Copy of your W-9)
  • a check for your advance payment fee, $400 (3/4") or $1,720 (3") 

Loudoun Water will make a photocopy of each item for the file. All customers are required to read and sign our permit indicating the proper use of hydrants and their locations. The signed permit is kept on file with identification papers for the life of each agreement. Each permit is valid for one year from the date signed.

Truck Inspection
All trucks must be inspected for proper cross connection/backflow specifications prior to issuing a hydrant meter. See diagrams below for what is required.

During this time, hydrant meter readings must be submitted by the 15th of each month in one of the following ways:

Damage to the hydrant or meter must be reported immediately to Loudoun Water by calling 571-291-7878.

Accepted uses of a hydrant meter include the following:

  • Construction: masonry, truck wash
  • Landscaping: a one-time solution for watering new sod, trees, etc.  

Request for approval is required for pool fill or events, please contact Loudoun Water at 571-291-7880.

Unacceptable uses of a hydrant meter include, but are not limited to:

  • A source of potable water
  • Supplying an irrigation system (definied as a watering method with pipes/hoses underground)
  • Leaving the hydrant meter unattended at any time
  • Use on a red hydrant is prohibited. They are only to be used by Fire & Rescue and Loudoun Water personnel

Expiration date

  • This permit is only valid for one year from the date the hydrant meter was issued. This hydrant meter MUST be returned to Loudoun Water by the expiration date listed above. At this time, you have two options:
    • You may return the hydrant meter (with hydrant wrench) and close your account, or
    • If you choose to use this hydrant meter for another year, it must be returned to Loudoun Water for calibration. This process can take up to one week, so please plan accordingly.
  • A penalty of $250.00 will be imposed if this hydrant meter is not returned by the expiration date listed above.
  • A charge of $35.00 will be assessed on the final bill for failure to return the hydrant wrench.
  • This permit may be revoked without notice for failure to comply with all instructions included on this permit or under emergency circumstances as determined by Loudoun Water.

Charges and Penalties

  • Rate per 1,000 gallons is $7.29
  • A one-time permit charge of $30.00 will be on your first bill for all new hydrant meter permits.
  • A minimum charge of $10.00 per month will be assessed whether the meter is used or not.
  • A basic monthly charge of $5.12 is applied to each bill.
  • A penalty of $100.00 will be imposed for each month there is a failure to report meter readings by the due date.
  • A penalty of $500.00 will be imposed for each instance of unauthorized or improper use of a fire hydrant based upon above stated regulations. The customer is responsible for any damage resulting from this instance.
  • If the hydrant meter is damaged beyond repair, the original advanced payment fee supplied will be forfeited. If repairs are possible, the customer may be billed for the parts replaced.
  • A penalty of $250.00 will be imposed for damages caused to the hydrant meter register or if it is missing.
  • Unlawful tampering with waterworks results in a Class 6 Felony, which carries a maximum penalty of five years in jail. Maliciously tampering with hydrants results in a Class 3 Felony, which carries a maximum penalty of 20 years in prison and a fine up to $100,000.

Operating Instructions

  1. The hydrant must be flushed before attaching the meter.
  2. Turn off the hydrant and attach the meter, making sure the gate valve on the meter is closed.
  3. Turn on the hydrant; the valve must be in the full open position when in operation.
  4. Operate the gate valve on the meter only when turning water on and off.
  5. All valves must be opened and closed slowly.

Area of Authorized Use 
Loudoun Water hydrant meters are to be used only on yellow hydrants within Loudoun Water’s service area. This is generally defined as the area east of Goose Creek to the Fairfax County line. You can access a map of available hydrants at, List and Map of Available Hydrants. Loudoun Water’s service area DOES NOT include the entire county.

Loudoun Water hydrant meters MAY NOT BE USED in any of Loudoun County’s incorporated towns, such as Leesburg, Purcellville, Hamilton, Round Hill, Lovettsville, and Middleburg, or outside the boundary of Goose Creek and the Fairfax County line. This includes Beacon Hill, Big Woods, Courtland Rural Village, Lenah Run, Oatlands Manor, Raspberry Falls, Red Cedar West, The Reserve at Rokeby, Selma Estates and Village Green at Elysian Heights. Any future village and/or hamlet community served by a groundwater well will also be restricted from hydrant meter usage. If there are any questions, please contact our office for further clarification at 571-291-7880 Monday through Friday, between 8:00 a.m. and 5:00 p.m.

If your company is working on an active construction project, the development company responsible for that project determines which fire hydrants will be yellow until the project is finalized by Loudoun Water, and then all fire hydrants within that development must be painted red, unless otherwise specified by Loudoun Water personnel.

Using Loudoun Water hydrant meters in any of the County’s towns, villages, hamlet communities, or anywhere outside Loudoun Water’s service area is considered theft and can result in fines and prosecution by the jurisdictional authorities. A $500 penalty will be imposed by Loudoun Water if you are found using Loudoun Water meters outside our service area, on red fire hydrants, or for improper hydrant meter use.