Sewer Utility

The Sewer Utility rate for residential properties is billed at a minimum of $280 for the first 100,000 gallons of water utilized.  The current sewer bill is calculated based on the usage for the months of November (of the prior winter) through April. This amount is then doubled to annualize the water used for the year. It is done this way to avoid the months when residents generally utilize more water for activities such as watering lawns, filling pools, washing cars, etc.

Any excess annual water usage above 100,000 gallons is billed at $.025 per gallon.  For example, if the actual usage is 115,000 gallons the bill will be calculate as follows:

$280. (100K gallons) + $375. (15K overage x .025) = $655.00 total bill for 115K gallons

*Water usage over 400,000 gallons is billed $7,780 for the first 400,000 gallons and .02685 per gallon in excess of 400,000 gallons.

Sewer bills are mailed once a year in February and contain two biannual payment stubs. Residents are welcome to pay the entire bill by March 15 if desired to avoid forgetting or misplacing the second one and accumulating late fees.  Taxes are due on: 

• March 15
• September 15

If a property owner does not have a sewer bill, use the tax payment site here to  find out the exact amount owed.  Failure to receive a bill does not exempt a taxpayer from paying sewer bills or interest that may be due, NJSA 54:4-64.  

Property owners that do not live at the address of the owned property and wish to have sewer bills sent to another location can complete the Change of Billing Address Request for the Tax Collector.

Payments may be made automatically by ACH payment. This must be prearranged by submitting an authorization agreement to the tax office for ACH direct withdrawal for the sewer utility.

Payment may also be made online at any time by credit card or with a transfer from a checking account. Residents can arrange electronic payment through their financial institution. Citizens should firmly establish the processing times needed by their financial institution to make these payments as they are mailed by the bank to the Township which can result in late fees if mail is delayed.

Finally, residents can pay sewer bills by mail, in person or at the Township Drop-Box. The drop-box is located to the left of the front doors of the Municipal building. This box is locked and only accessible to the tax collector.

Payments must be received in the Tax office no later than the final day of the 10-day grace period.  If the final day of the grace period falls on a weekend and/or holiday, the grace period is extended to the next business day. 

After the 10-day grace period interest is applied, calculated at 8% on the first $1,500 past due and 18% for any amount over $1,500. (per NJSA 54 4, 1967). Properties with delinquent municipal charges (taxes, sewer and interest) totaling $10,000 or more at calendar year end are subject to an additional 6%-year end penalty.

Postmarks are not accepted.   Postal delays are not the responsibility of the Tax office. The Tax Collector has no statutory authority to reduce a tax or waive interest charges.

Before paying your  bill, avoid these common mistakes requiring the Tax Collector to return checks as this may result in delay of payment and result in interest charges on late payments:

• Check must have the current date; postdated checks are not accepted.
• Check is made payable to Clark Township
• Check is signed.
• The numeric amount matches the written amount.
• If a payment is past due, please enter your information on the tax payment site to  find out the exact amount of interest due at that time to avoid additional interest charges.  
• For mail, in-person and drop-box payment, please include the appropriate stub with your check. Your cancelled check is your receipt. 
• The mailing address is :

Township of Clark

Attn: Tax Collector

430 Westfield Avenue

Clark, NJ 07066

Residents wishing to file for an adjustment to their annual sewer bill may apply using this form:

2026 Application for Sewer Bill Adjustment

 2025 Application for Sewer Bill Adjustment

Senior Citizen Discounts

Senior Citizens who are entitled to a Senior Citizen Property Tax Deduction, in accordance with NJSA 54:4-8.44, shall continue to receive a discount of $140 from the sewer bill.

If you are having trouble paying your sewer, water, or electric bill, you may be eligible for the State of NJ's Winter Termination Program, which temporarily protects eligible households from utility shutoffs between November 15 and Mary 15.

Please review or download this document for more information.