Sewer Billing

Residential Sewer Bills Are Due February 28

Residential sewer service bills for 2018 are due on Wednesday, February 28. Customers who have questions, have misplaced or did not receive their bill can contact the New Castle County Office of Finance at (302) 323-2600 weekdays from 8 a.m. to 4 p.m. MORE

Check Your Payment Status

You can access your sewer bill information and payment status online to obtain detailed account information including payment history for both sewer service billing and taxes.

Methods of Payment

  • Walk-in payments are accepted at the New Castle County Government Center, located at 87 Reads Way in New Castle. Payments by cash, check, money order, and debit card are accepted. The payment window is open between the hours of 8 a.m. and 4 p.m., Monday through Friday.
  • A drop box is also available for making check and money order payments 24 hours a day at the main entrance of the New Castle County Government Center.
  • If you lose or misplace the self-addressed envelope that was sent with the bills, you can mail your payment to: 
  • New Castle County Sewer
    P.O. Box 470
    Claymont, DE 19703
  • Major credit cards are accepted through Paymentus, a third-party company that accepts Visa, MasterCard, Discover, American Express, and electronic check. You can pay your residential sewer service bill online by clicking here, or by calling Paymentus toll-free at 1-877-225-7351. Paymentus charges users a service fee of $5.25 for each transaction per $650 increment. If you are paying more than $650, you will be required to pay with multiple transactions when using this service. If you have any questions concerning making payments through Paymentus, you may call their Customer Contact Center at 1-800-420-1663.

Change to Discover Card Payments

Discover has discontinued the government payment program that New Castle County has been using to accept and process Discover Card payments by phone and at the New Castle County Government Center.  As a result, New Castle County will no longer be able to process Discover Card payments directly.  Customers can still use their Discover Card to pay tax or sewer bills, but will need to do so through our Paymentus payment platform. 

To make a payment with a Discover Card, customers may call Paymentus at (877) 225-7351, or through the County website by clicking here.  Paymentus charges users a service fee of $5.25 for each transaction per $650 increment.

Pre-Payment of Sewer Service Charges

In an effort to assist customers in managing the amount of their annual sewer bill amounts, New Castle County allows you to pay on your account in advance.

Any advance payment made will post to your account as a credit and apply to the next bill generated on your account.  The County accepts “pre-payments” by all accepted payment types listed in the above “Methods of Payment” section.
You may also choose to make pre-payments through an online payment service, possibly through your bank.  If you choose to make payments to us in this manner, you will need to have your account number (for sewer bills, this is referred to as your “parcel number”), and our name and mailing address for payments.

You may get your account/parcel number from your bill or from our website. You may search for your account/parcel number on our website with your property address by clicking HERE.

Name and Address (For a SEWER payment):

New Castle County Sewer
PO Box 470
Claymont, DE 19703

Refund of Tax or Sewer Charges Paid in Error

If you believe you paid New Castle County property tax or sewer service fees in error, you can request a refund by completing this form. The form must be completed, signed and returned to New Castle County's Treasury Division either by postal mail, fax, or email (a completed scanned copy with signature).

New Castle County Government Center
Office of Finance - Treasury
87 Reads Way
New Castle, DE 19720

FAX - (302) 395-5110

Billing Schedule

Residential sewer service bills for 2018 were mailed on Wednesday, January 24 and will be due on Wednesday, February 28, 2018. All residential properties connected to the New Castle County sewer system are billed on an annual basis. This billing is mailed out once a year in January in advance for the current calendar year. For example, sewer service bills due February 28, 2018 cover the calendar year ending December 31, 2018. Sewer service bills are based on a property's actual water usage over a prior 12-month period. The property's water company provides this information in quarterly amounts to New Castle County.


If you have questions, or need additional information, contact the New Castle County billing information line at 302-323-2600 or via email. You can also check out our frequently asked questions.

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