Fairfax Water Account Help Center for Online Payments, Phone Pay, High Bills and Service Changes
This guide is for Fairfax Water customers who need to pay a bill, register at FWCustomer.org, avoid third-party payment sites, check a balance, use Speedpay by phone, start or stop service, open a tenant account, handle a past-due notice, or request help after a leak.
Every section below includes the official Fairfax Water link, phone number, fee, address, timing rule or account requirement directly inside the step, so the page works like a practical payment desk instead of a generic bill-pay article.
Fast answer: Fairfax Water customers can pay through the official FWCustomer.org Customer Portal, make a one-time portal payment without registering, pay by free ACH bank account, pay by debit/credit card with a $4.25 convenience fee, use Speedpay by phone at 1-877-311-9969, mail payment to Fairfax Water, P.O. Box 5008, Merrifield, VA 22116-5008, or pay in person at the Morin Building at 8570 Executive Park Avenue, Fairfax, VA 22031.
Do not miss this: Fairfax Water warns that third-party bill-pay sites may look affiliated but are not endorsed by Fairfax Water. For urgent or past-due accounts, use the official portal, Speedpay, or call 703-698-5800 instead of relying on a third-party payment site.
Fairfax Water Bill Payment Quick Facts
Fairfax Water Action Board: Use the Right Official Step
Start here. Pick the situation that matches the customer’s need, then use the official link or phone number inside the card.
I need to pay online
Use the official Customer Portal. ACH bank payments are free; debit/credit card payments have a $4.25 convenience fee.
Open FWCustomer.orgI want to pay without registering
The Customer Portal allows one-time payment without registration. Use the official portal, not a third-party bill-pay site.
Payment pageI want phone payment
Use Speedpay at 1-877-311-9969 with your 13-digit account number, service address ZIP code and payment amount.
Call SpeedpayI need account or billing help
Call Fairfax Water Customer Service at 703-698-5800, weekdays 8:00 AM to 6:00 PM.
Call 703-698-5800My bill is high
Check for toilet, plumbing, outdoor and underground leaks. If repaired, submit proof for a possible courtesy leak adjustment.
Leak helpI have a water emergency
Call the emergency line at 703-698-5613 for water main breaks, pressure problems, leaks or water-related emergency service.
Call emergency lineHow to Pay a Fairfax Water Bill Online
| Online payment task | Official detail | Best use | Official action |
|---|---|---|---|
| Register portal account | Register at FWCustomer.org to view bills, turn off paper bills, set up recurring debit, view usage/billing history and request notifications. | Best for homeowners or long-term customers who want usage history and paperless billing. | Register / login |
| One-time payment | The portal allows a one-time payment without registration. | Best for quick bill payment when you do not need full account setup. | Official payment page |
| ACH bank account | Fairfax Water says ACH payment from a bank account is free, whether one-time or recurring. | Best for avoiding card convenience fees. | Use bank payment |
| Debit / credit card | Card payments are processed by Speedpay and carry a $4.25 convenience fee. | Best when card payment is necessary and fee is acceptable. | See fee note |
| Automatic debit | Recurring debit begins upon sign-up and the bill amount is deducted from checking or savings account on the due date. | Best for avoiding missed quarterly due dates. | Enroll in recurring debit |
Speedpay Phone Payment: What to Prepare
Have these ready
You need your 13-digit account number, service address ZIP code and payment amount.
Speedpay detailsFee and limits
Speedpay has a $4.25 transaction fee. Transactions are limited to $400 each, with up to three transactions every 30 days.
Verify limitsMail, Office and Night Deposit Box Payment Options
| Payment method | Official detail | Best use | Action |
|---|---|---|---|
| In person | Cash, check or money order payments are accepted at the Morin Building, 8570 Executive Park Avenue, Fairfax, VA 22031, Monday–Friday, 8:00 AM–4:30 PM ET, except holidays. | Best for cash, money order, urgent payment questions or account support. | See map |
| Night deposit box | Check or money order payments can be deposited anytime using the night deposit box at the front entrance of the main building. | Best for after-hours non-cash payment. | Deposit box info |
| Mail payment | Mail payment to Fairfax Water, P.O. Box 5008, Merrifield, VA 22116-5008. | Best when the bill is not urgent or near disconnection timing. | Mail address |
| Bank bill pay | Set payee as Fairfax Water. Depending on your bank, the name may appear as Fairfax County Water Authority or Fairfax Water. Use your 13-digit account number and the Merrifield remit address. | Best if your bank reliably sends payments with the correct account number. | Bank payment note |
Account Number, Balance Check and Portal Registration
13-digit account number
Fairfax Water phone and Speedpay tools use the 13-digit account number and service address ZIP code.
Payment instructionsPortal registration
To register at the Customer Portal, use your Fairfax Water account number plus the city and ZIP code for the property receiving service.
Register at portalResidential billing cycle
Fairfax Water’s FAQ says residential customers are billed every three months.
Customer FAQPast-Due Fairfax Water Bill, Late Charge and Shutoff Risk
Fairfax Water rules say bills are due when rendered. Failure to receive a bill is not considered a reason for nonpayment, so portal alerts and paperless setup can reduce missed-bill risk.
| Past-due issue | Official rule / fee | What to do | Official action |
|---|---|---|---|
| Bill not paid after 30 days | A late charge is added according to the current Schedule of Rates. | Pay online with ACH or card/Speedpay and save confirmation. | Pay online |
| Not paid after 45 days | Customer may receive written notice that service will be discontinued ten days from notice mailing if payment is not received. | Call Customer Service before the shutoff date if there is a dispute, objection or payment problem. | Call 703-698-5800 |
| Service disconnected | 2026 Turn Off/Turn On Charge is $61 and must be paid before service is restored. | Ask whether the full balance, restoration fee, and same-day timing requirements have been satisfied. | Rates page |
| After-hours restoration | 2026 after-hours service restoration charge is listed as $58 in addition to applicable restoration costs. | Ask whether restoration is regular-hours or after-hours before paying. | Restoration fee |
| Returned payment | 2026 returned payment charge is $25. | Use a secure method and confirm funds before ACH or check payment. | Returned payment fee |
| Unauthorized reactivation | 2026 unauthorized use charge is $250 if a customer willfully reactivates service after Fairfax Water has discontinued it. | Do not turn water back on yourself. Call Fairfax Water. | Call Customer Service |
Past-due call script
2026 Fairfax Water Rates and Bill Line Items
Fairfax Water says new rates went into effect April 1, 2026. These items help users understand why a bill changed, but customers should still check the official rate page for large-meter and nonresidential details.
| 2026 rate / charge | Official detail | Why it matters | Official source |
|---|---|---|---|
| Quarterly service charge | $17.55 for a standard 5/8-inch residential meter. | Appears on all bills and helps cover meter reading, repair, billing, collecting and customer-service operations. | Rates |
| Commodity charge | $4.35 per 1,000 gallons for established accounts; $4.50 per 1,000 gallons for new accounts. | Usage charge for water used during the previous three months. | Commodity rate |
| Peak use charge | $4.20 per 1,000 gallons during billing periods ending June through November when use exceeds the peak threshold. | Outdoor use, irrigation and leaks can trigger higher seasonal cost. | Peak use charge |
| Account charge | $50 on initial bills. | Covers office and field work to open a new account. | Account charge |
| Sewer charges | Fairfax Water does not provide sewer service, but it does provide sewer billing for Fairfax County and the Cities of Falls Church and Fairfax. | Your “water bill” may include sewer charges set by a different sewer service provider. | Sewer charges |
| Not-for-profit utility | Fairfax Water says it is separate from Fairfax County Government and does not receive taxpayer revenue. | Rates are designed to cover the cost of providing water service. | How rates are set |
High Fairfax Water Bill? Check Leaks Before You Pay Blindly
Fairfax Water says leaks are often the culprit, and toilet leaks are the most common type. A single running toilet can quietly waste more than 1,000 gallons in one day.
Stop all water use
Turn off faucets and running water, then read the meter gallon count.
Leak test guideWait at least 15 minutes
Do not use water. Read the meter again. If the numbers changed, water is moving somewhere.
Meter checkRun a longer test overnight
Read the meter before bed and again in the morning before anyone uses water. This can find slow or intermittent leaks.
Slow leak testCheck underground leak
If the meter is outside, turn off the main valve inside and check whether the meter keeps running. If it does, there may be a leak between the meter and valve.
Underground leak stepsLeak adjustment eligibility
Repair the leak promptly, provide written proof of repairs, and have no Courtesy Leak Adjustment in the preceding five years.
Leak adjustment FAQProof required
Submit copies of receipts or an invoice. Fairfax Water says the response is usually sent after review; leak page notes up to four weeks.
Submit leak informationAdjustment limits
Only one quarterly billing period is adjusted, and water adjustment amounts are capped at $5,000.
Rules and regulationsHigh-bill call script
Tenant, Landlord, Start Service and Stop Service Notes
Fairfax Water’s Customer Portal includes start/stop service options. Tenant accounts have extra requirements because unpaid water/sewer charges can create property-lien risk.
| Service situation | Official detail | Practical step | Official action |
|---|---|---|---|
| Start or stop service | Fairfax Water links start service and stop service through the Customer Portal. | Use the portal when you are moving in or out; call if timing is urgent. | Start / stop service |
| Tenant account | Tenant customers must submit a Tenant Authorization Form and $190 Lien Offset payment before the service start date. | Do not wait until move-in morning; processing and payment timing matter. | Tenant requirements |
| Tenant form | The form must be completed and signed by the legally recorded property owner or authorized agent. | Landlords/property managers should complete the authorization before tenant payment. | Portal tenant form |
| Lien Offset timing | The $190 Lien Offset must be received before 8:00 AM on the service start date to avoid service delays. | If service begins same day, call 703-698-5800 once the Lien Offset is paid. | Call Customer Service |
| Final bill credit | The $190 Lien Offset is applied to the final bill when the account is closed. | Ask about this when stopping tenant service. | Tenant / landlord page |
Fairfax Water Bill Payment Help and Assistance
Contact Fairfax Water first
If you are having difficulty paying, send a message through the Customer Portal or call Customer Service at 703-698-5800.
Call 703-698-5800Use the community organization list
Fairfax Water maintains a list of local organizations that may assist with utility bill payments.
Payment help pageCheck local government programs
Fairfax Water points customers to Fairfax County Basic Needs and Assistance, City of Falls Church Housing and Human Services, and Fairfax City programs.
Assistance resourcesAsk before shutoff timing
Assistance can take time. If a notice has already arrived, call Fairfax Water and ask what keeps service active while assistance is pending.
Call nowAvoid Third-Party Payment Sites and Utility Scams
Use official portal
Fairfax Water warns that third-party bill-pay websites may appear affiliated but are not associated with or endorsed by Fairfax Water.
Official payment pageCheck the domain
Use fairfaxwater.org for information and FWCustomer.org for the Customer Portal. Avoid search ads or bill-pay sites that add delay or extra risk.
Fairfax Water homeVerify pressure calls
If a caller demands immediate payment, hang up and call Fairfax Water Customer Service at the published number.
Call 703-698-5800Fairfax Water Office Map and Visit Plan
Use this for Fairfax Water’s Morin Building at 8570 Executive Park Avenue, Fairfax, VA 22031. The headquarters is open weekdays, 8:00 AM to 4:30 PM. Customer Service phone support is available weekdays, 8:00 AM to 6:00 PM.
Bring
Bill, 13-digit account number, service address ZIP code, payment method, shutoff/past-due notice, tenant authorization, lien offset proof, or leak repair proof if relevant.
Ask before leaving
“Is my payment posted, is service safe from shutoff, and are there any extra fees, lien offset requirements, returned-payment issues or restoration charges?”
Emergency shortcut
For water-related emergencies, do not wait for billing hours. Call Fairfax Water’s emergency line at 703-698-5613.
Official Fairfax Water Links Used in This Guide
Fairfax Water Bill Payment FAQ
How do I pay my Fairfax Water bill online?
Use the official FWCustomer.org Customer Portal. You can register to manage your account, view usage and billing history, go paperless, set recurring debit, or make a one-time payment without registration.
Is there a fee to pay a Fairfax Water bill online?
ACH payments from a bank account are free. Debit and credit card payments processed through Speedpay have a $4.25 convenience fee.
Can I pay Fairfax Water by phone?
Yes. To pay by phone using Speedpay, call 1-877-311-9969, TTY 711. Have your 13-digit account number, service address ZIP code and payment amount ready. The fee is $4.25 per transaction.
What is Fairfax Water customer service phone number?
Call Fairfax Water Customer Service at 703-698-5800, TTY 711. The call center is available weekdays from 8:00 AM to 6:00 PM.
Where do I mail a Fairfax Water payment?
Mail payment to Fairfax Water, P.O. Box 5008, Merrifield, VA 22116-5008. Include your 13-digit account number so the payment is credited correctly.
Where is the Fairfax Water office?
Fairfax Water’s Morin Building is at 8570 Executive Park Avenue, Fairfax, VA 22031. Cash, check and money order payments are accepted Monday through Friday, 8:00 AM to 4:30 PM ET, except holidays.
How often does Fairfax Water bill residential customers?
Fairfax Water says residential customers are billed every three months.
Can I get help with a high Fairfax Water bill caused by a leak?
Possibly. Fairfax Water offers a courtesy leak adjustment if the customer promptly repairs the leak, provides written proof of repairs, and has not received a Courtesy Leak Adjustment during the preceding five years.
What is the Fairfax Water tenant lien offset payment?
Tenant accounts require a Tenant Authorization Form and a $190 Lien Offset payment before the service start date. Fairfax Water says the $190 is applied to the tenant’s final bill when the account is closed.
Who do I call for a Fairfax Water emergency?
For a water-related emergency, water main break or urgent service issue, call Fairfax Water’s emergency line at 703-698-5613, TTY 711.