Understanding Your Bill

Groton Utilities sends each customer a monthly bill for utility services. This website is aimed at helping you to understand the information it contains. For personal assistance, please feel free to call one of our Customer Care Representatives at 860.446.4000.


Understanding Your Bill Image


  1. Return this with your bill
    Your bill’s white top section is perforated so you can tear it off and return it to us with your payment. Please write the account number you see on your check or money order. Be sure to note the past due date, which is the last day to pay without penalties.
    Your monthly bill is payable on receipt and becomes past due after 30 days. If you are having trouble paying your bill, please visit our Customer Care Center at the address below or call us to arrange a payment plan.
  2. What you used
    Your bill’s middle section shows your electricity and water use for the month, based on readings from your electric and/or water meter. Your average daily usage for each utility service is also included.
  3. Your Charges
    Any past due balances appear on the lower half of your bill, followed by details of your current charges. Your usage for the month is shown multiplied by current rates to arrive at metered energy and water charges.If you now get separate water and electric bills, you can request a combined statement by calling 860.446.4000.
  4. Your History
    Graphs at the lower left display your usage history for the past 12 months, so you can see how much electricity and/or water you have used in the past.
  5. Your Budget Plan
    If you are on our Budget Billing Plan, a detailed account of your personal plan is in a box at the left center portion of the bill.
  6. Back of your bill
    The back of your bill includes general information aimed at helping you to better understand specific items.Following are explanations of various items which may appear on your bill.

    Readiness to Serve and Basic Service Charge
    This charge covers the costs of providing your service, including meter-reading, billing, and maintenance of electric and water lines and meters on your premises. As these basic service charges cover fixed costs, they will be billed to you whether or not you consume any electricity or water.

    Purchased Power Adjustment
    This charge or credit reflects differences in the monthly wholesale cost of our purchased power. It includes fixed, variable, and fuel costs.

    This abbreviation stands for kilowatt-hour, the standard measure of electricity. A kilowatt-hour equals 1,000 watt-hours of electricity use. One KWH of electricity will light a 100-watt bulb for 10 hours.

    This abbreviation stands for 100 cubic feet, the standard measure of water quantity.

    Late Charges
    Bills are due when received and past due 15 days after billing. Past due bills are subject to 1.25% late charge and will be assessed with the next bill if payment is not received before billing.

    Sales Tax
    Commercial class customers are required by the State of Connecticut to pay sales tax on the electric portion of their bill.

    Bill Inquiries
    For prompt and convenient service regarding your account, be sure to give the Customer Service Representative your account number when you call. Our representatives are available from 8:00 a.m. to 5:00 p.m. each weekday except holidays. Our number is 860.446.4000.