St Charles Bill Pay – Online Water Payment Portal (2026)
Need to pay your St. Charles water and sewer bill online? For City of St. Charles, Missouri customers, the official water and sewer payment route is the City’s Water & Sewer Bill payment portal linked from the official “Pay” page.
This guide explains the official St. Charles water bill payment portal, phone payment number, automatic bill pay form, Finance Department contact, billing frequency, City Hall address, Public Works emergency number, and practical steps to avoid payment delays.
Quick answer: Pay your City of St. Charles, MO water and sewer bill online through the official city portal, or pay by phone at 866-675-5526. For water and sewer billing questions, contact the Finance Department at 636-949-3212. City Hall is located at 200 N Second Street, Saint Charles, MO 63301.
St. Charles water bill payment options
People searching for “St Charles bill pay,” “St Charles water bill online,” “St Charles water sewer bill,” or “St Charles MO utility billing” usually need the official city payment link and the correct phone number.
City of St. Charles customers can pay online, pay by phone, set up automatic bill pay using the city form, or contact the Finance Department for water and sewer service questions.
1) Pay online
Use the official City of St. Charles Water & Sewer Bill portal linked from the official city Pay page.
Best for: online payment from home or mobile without visiting City Hall.
2) Pay by phone
The City’s Pay page says customers can pay water utilities by calling the phone payment number.
Phone payment: 866-675-5526
3) Automatic bill pay
The City provides an Automatic Bill Pay Authorization Form for customers who want to set up automatic payment.
Best for: avoiding missed bi-monthly due dates.
4) Billing questions
For water and sewer service or billing information, the City directs customers to the Finance Department.
Finance Department: 636-949-3212
How to pay St. Charles water bill online step by step
If this is your first time paying online, use the official City of St. Charles Pay page or the Water & Sewer Bill portal. Avoid unofficial third-party pages if you are not sure how fast the payment will post.
Open the official City Pay page
Go to the official City of St. Charles Pay page here: stcharlescitymo.gov/395/Pay.
Select Water & Sewer Bill
Click the Water & Sewer Bill option. The City links this option to its online payment portal for water utilities.
Enter your account details
Keep your latest water and sewer bill nearby. Enter the account information exactly as shown on the bill so the payment applies to the correct account.
Review amount and due date
St. Charles bills water and sewer on a bi-monthly basis. Check the amount due and the due date before submitting your payment.
Submit payment carefully
Do not refresh the page while the payment is processing. Wait until the portal returns a confirmation or payment result.
Save the confirmation
Save the confirmation number or receipt. Keep it until the payment appears correctly on your water and sewer account.
Billing tip: St. Charles water and sewer bills are bi-monthly, so each bill can cover roughly two months of usage. Do not compare it directly with a monthly bill from another city unless you adjust for the longer service period.
St. Charles water bill phone, autopay, billing cycle, and contact details
The table below gives the most useful payment and contact information in one place. On mobile, each table row becomes a readable card layout.
| Payment item | Official detail | What you should do |
|---|---|---|
| Online payment | Water & Sewer Bill portal | Use the official city Pay page, then choose Water & Sewer Bill. |
| Pay by phone | 866-675-5526 | Call this number to pay your water utilities by phone. |
| Billing questions | Finance Department: 636-949-3212 | Call for water and sewer service or billing information. |
| Billing cycle | Bi-monthly | Expect bills around every two months; check your due date before paying. |
| Meter reading | Every two months | Review usage on the bill because charges are based on water usage. |
| Automatic payment | Automatic Bill Pay Authorization Form | Use the city form and keep paying manually until automatic payment is confirmed. |
| City Hall | 200 N Second Street, Saint Charles, MO 63301 | Use City Hall for general city contact and official records. |
| After-hours emergency | 636-255-6115 | Use this Public Works emergency number for after-hours utility-related emergencies. |
How St. Charles automatic bill pay works
The City provides an Automatic Bill Pay Authorization Form for water and sewer customers. This is helpful because St. Charles bills bi-monthly, and it can be easy to forget a bill that does not arrive every month.
Before relying on automatic payment, confirm that the authorization has been accepted and that your next bill shows the correct payment status.
- Open the official Bill Pay Automatic Form page.
- Download or complete the Automatic Bill Pay Authorization Form.
- Enter the required account and payment information carefully.
- Submit the form using the city’s instructions.
- Continue paying manually until automatic bill pay is confirmed.
- Check your next statement to make sure the payment method is working.
Practical advice: Because St. Charles bills every two months, set a reminder after each bill is issued. If you use automatic bill pay, still check the first one or two drafts to confirm the payment posted correctly.
Pay St. Charles water bill by phone, portal, or billing support
If you do not want to use the online portal, use the official phone payment option or contact the Finance Department. For public works or utility emergencies, use the emergency contact listed by the city.
Pay by phone
Water utility phone payment: 866-675-5526
Have your bill and account details ready before calling.
Finance Department
Water & Sewer service: 636-949-3212
Use this for water/sewer service information and billing questions.
Public Works emergency
After-hours emergency: 636-255-6115
Use for after-hours Public Works/utility emergency needs.
What to do if your St. Charles water bill is late
If your water and sewer bill is already late, use a faster official payment method and contact the Finance Department if you are unsure about the exact balance or account status.
- Use the official online water/sewer payment portal for faster payment.
- Call 866-675-5526 if you prefer phone payment.
- Call 636-949-3212 for billing or water/sewer service questions.
- Save your confirmation number or receipt until your account updates.
- Do not rely on slow mailing or bank bill pay if your due date is very close.
City of St. Charles water bill contact information
City of St. Charles Water & Sewer Billing
City Hall:
200 N Second Street
Saint Charles, MO 63301
Main City phone: 636-949-3200
Water & Sewer billing / Finance Department: 636-949-3212
Pay by phone: 866-675-5526
Public Works:
2871 Elm Point Industrial Drive
Saint Charles, MO 63301
Public Works phone: 636-949-3363
After-hours emergency: 636-255-6115
Public Works hours: Monday–Friday, 7:00 AM–4:00 PM
Official site: stcharlescitymo.gov/395/Pay
Map for St. Charles City Hall
If you need to visit City Hall, use the map below for 200 N Second Street, Saint Charles, MO 63301.
Frequently asked questions
How do I pay my St. Charles water bill online?
Go to the official City of St. Charles Pay page and choose the Water & Sewer Bill option. The city links this option to the online payment portal.
What is the St. Charles water bill phone payment number?
The City of St. Charles Pay page says water utilities can be paid by calling 866-675-5526.
Who do I call for St. Charles water and sewer billing questions?
For information on water and sewer service, contact the Finance Department at 636-949-3212.
How often does St. Charles bill for water and sewer?
The City of Saint Charles bills for water and sewer services on a bi-monthly basis. Water meters are read every two months.
Does St. Charles offer automatic bill pay?
Yes. The city provides an Automatic Bill Pay Authorization Form for customers who want to set up automatic payment.
Where is St. Charles City Hall?
City Hall is located at 200 N Second Street, Saint Charles, MO 63301.
What is the St. Charles main city phone number?
The main City Hall phone number is 636-949-3200.
What is the St. Charles Public Works phone number?
The Public Works Department phone number is 636-949-3363.
Who do I call for St. Charles after-hours utility emergencies?
For Public Works after-hours emergency needs, call 636-255-6115.
Are St. Charles water and sewer charges based on usage?
Yes. The city states that water and sewer billing is based on water usage, and water meters are read every two months.
Official resources