Payment channels

Pay Fairfax Water (Fairfax County Water Authority)

Use the provider’s verified online, telephone, mail, or counter instructions. Check the final confirmation screen for the amount, processing date, and any transaction fee before submitting.

Primary online route

Use the official payment portal

The direct portal is the fastest route when it is available. The provider identifies its payment gateway as Speedpay, an ACI Worldwide company, processes Fairfax Water debit/credit-card and one-time payment transactions; the customer-facing registered portal is branded FWCustomer.org.. Never enter account credentials into a lookalike site reached through an unsolicited message.

Open payment portal ↗

Telephone payment

Phone IVR

Speedpay automated phone payments use (877) 311-9969, TTY 711, with the 13-digit Fairfax Water account number, service-address ZIP code, and payment amount. The Fairfax Water IVR at (703) 698-5800 provides balance and due-date information; select option 3 during business hours or option 2 after hours. After-hours customer/emergency service is (703) 698-5613.

Have your account number and payment instrument ready. Follow the provider’s recorded prompts and retain the confirmation number.

Alternative channels

Mail, text, and in-person payment instructions

Pay by text

Fairfax Water's current payment pages do not publish a direct text-to-pay keyword or SMS enrollment flow. The FWCustomer.org portal can provide account notifications and usage/billing history, while Speedpay provides phone and online card/ACH payment. Customers should treat unsolicited text payment instructions as suspicious and verify directly through fairfaxwater.org or (703) 698-5800.

Mail-in address

Fairfax Water, P.O. Box 5008, Merrifield, VA 22116-5008. Customers using bank bill-pay should set the payee as Fairfax Water or Fairfax County Water Authority and use the 13-digit account number and this remittance address; include the payment stub and never mail cash.

Counters, drop boxes, and office hours

Fairfax Water's Morin Building, 8570 Executive Park Avenue, Fairfax, VA 22031, accepts cash, check, or money order payments Monday-Friday 8:00 a.m.-4:30 p.m. Eastern, excluding holidays. Checks or money orders may be placed at any time in the night-deposit box at the front entrance. Payments may also be made through a customer's bank bill-pay service; Fairfax Water warns that unaffiliated third-party bill-pay sites may appear in searches and are not endorsed by the utility.

Accepted digital instruments

What you can use online

FWCustomer.org accepts free one-time or recurring ACH payments from a checking or savings account and supports paperless billing, usage history, and notifications. Speedpay accepts bank accounts and credit/debit cards including Visa, Mastercard, American Express, NYCE, STAR, and PULSE; phone and one-time card payments are processed through Speedpay. Customers may also use their bank's online bill-pay service, subject to the bank's own fees and delivery timing.

2026 transaction pricing

Convenience fees

A $4.25 convenience fee applies to Fairfax Water debit- or credit-card payments through the customer portal's card path, Speedpay online payments, and the Speedpay phone payment service. One-time and recurring ACH payments from a bank account are free through FWCustomer.org. Speedpay transactions are limited to $400 each, with up to three transactions in a 30-day period; a returned bank draft or payment also incurs a return-payment fee, currently $25.

Fees can vary by payment type, channel, account class, and processor terms. The checkout screen is the final fee disclosure.

Payment guidance

Choose the payment channel that fits your deadline

The safest payment path is the one published by Fairfax Water (Fairfax County Water Authority) and matched to the account information on your bill. Online portals are convenient, but telephone, mail, counter, and drop-box options may follow different posting schedules and may use different fees.

For a routine payment, save the final confirmation page or IVR number and check when the transaction will post. For a same-day shut-off notice, do not assume that submitting a card payment automatically stops a field order; ask the provider what amount and confirmation are required.

Never send your account number, password, card details, or bank information to Water Ledger. Those details belong only on the provider’s verified payment channel or at an authorized counter.

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