Payment channels

Pay City of Thornton Water

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 Paymentus is identified as Thornton’s billing and payment portal provider; the reviewed official page routes existing customers to the Utility Billing Customer Payment Portal.. Never enter account credentials into a lookalike site reached through an unsolicited message.

Open payment portal ↗

Telephone payment

Phone IVR

A dedicated this detail was not publicly posted. Utility Billing customer service is 303-538-7370, but a separate automated payment number was not exposed.

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

Thornton’s WaterSmart portal supports text reminders and leak alerts after the customer registers with the 13-digit account number and ZIP code; no text-to-pay keyword or payment-by-text enrollment flow was verified.

Mail-in address

City of Thornton, P.O. Box 209103, Dallas, TX 75320-9103; Thornton warned that beginning in 2026 payments sent to the old Denver address would be returned.

Counters, drop boxes, and office hours

Thornton Utility Billing provides payment options through its customer portal and new CheckFreePay retail route. CheckFreePay accepts cash or debit at participating Walmart and King Soopers locations, generally seven days per week until about 9:00 p.m., with a retailer transaction fee; exact locations vary. Utility Billing can be reached at 303-538-7370 for current counter/drop-box details.

Accepted digital instruments

What you can use online

Paymentus supports online account payment; the reviewed official sources did not enumerate all card, ACH, and wallet types. WaterSmart is a separate usage/leak-monitoring portal, not the billing account itself.

2026 transaction pricing

Convenience fees

A dedicated this detail was not publicly posted. The reviewed Thornton materials did not expose a current 2026 online processing fee.

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 City of Thornton Water 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.

Return to utility profile →Review shut-off rules →