Connecticut Natural Gas (CNG) customers may need help with a natural gas emergency, billing question, payment arrangement, meter reading, high bill, starting or stopping service, account access, financial assistance, property damage claim, or customer-service complaint. CNG provides separate customer-service numbers for its Greater Hartford and Greenwich service areas, along with a dedicated 24-hour natural-gas emergency line.
Connecticut Natural Gas Customer Service Contact Information
- Greater Hartford Customer Care: 860-524-8361
- Greenwich Customer Care: 203-869-6900
- Live Customer Service Hours: Monday-Friday, 8:00 AM-6:00 PM ET
- Automated Phone Support: Available 24/7
- Natural Gas Emergency: 866-924-5325, 24/7
- Greater Hartford Local Gas Emergency: 860-246-5325
- Greenwich Local Gas Emergency: 203-869-6913
- Credit & Collections: 844-383-8827, Monday-Friday, 8:00 AM-6:00 PM ET
- Greater Hartford Meter Reading: 860-727-3400
- Greenwich Meter Reading: 800-437-0444
- Deaf and Hard of Hearing Assistance: Dial 711
- Email Support: CNG Contact Form
- CNG / Avangrid Office: 180 Marsh Hill Road, Orange, CT 06477
- Official Website: CNGcorp.com
CNG states that inquiries submitted through its online email form generally receive a response within three business days.
Connecticut Natural Gas Emergency Number
If you smell natural gas or suspect a gas leak, CNG instructs customers to get up, get out, and get away.
After reaching a safe location, call:
or call 911.
Do not remain inside the building while contacting customer service.
Avoid:
- Turning electrical switches on or off
- Using a telephone inside the affected building
- Lighting matches or candles
- Starting a vehicle close to the suspected leak
- Trying to locate or repair the leak yourself
The regular billing or customer-service number should not be used instead of the emergency number when natural gas may be leaking.
Best CNG Support Route by Issue
- Gas smell or suspected leak: Leave immediately and call 866-924-5325 or 911 from a safe location.
- Hartford-area billing or account question: Call 860-524-8361.
- Greenwich billing or account question: Call 203-869-6900.
- Past-due balance or payment arrangement: Call Credit & Collections at 844-383-8827.
- Meter reading: Hartford-area customers can call 860-727-3400; Greenwich customers can call 800-437-0444.
- Start, stop, or transfer service: Use CNG’s Moving tools or contact Customer Care.
- High bill: Review usage and meter information, then contact Customer Care if the amount still appears incorrect.
- Financial hardship: Review CNG’s Help With Bill programs and contact Credit & Collections.
- Property damage claim: Use CNG’s official Property and Casualty Claim form.
- Unresolved utility complaint: Contact CNG first, then Connecticut PURA if the matter remains unresolved.
Connecticut Natural Gas Billing Help
Customers can manage many routine billing tasks online through CNG MyAccount.
Available account tools include:
- Viewing current and previous bills
- Making payments
- Enrolling in AutoPay
- Signing up for eBill
- Reviewing energy usage
- Managing account alerts
- Using Budget Billing
- Starting, stopping, or transferring eligible service
Customers who cannot access MyAccount can use the password- or username-recovery options on the login page.
High Connecticut Natural Gas Bill
If a CNG bill appears unusually high, compare more than just the dollar amount.
Check:
- Natural gas usage shown on the bill
- Number of days in the billing period
- Current versus previous meter readings
- Whether the reading was actual or estimated
- Recent outdoor temperatures
- Heating-system use
- Water-heating use
- Current CNG rates and gas-supply charges
Natural gas heating usage can vary significantly during colder weather.
CNG’s Energy Analyzer and online account tools can help customers compare usage over time.
If the meter reading or usage still appears incorrect, contact Customer Care and have the bill and current meter information available.
CNG Meter Reading Phone Numbers
Connecticut Natural Gas currently provides separate automated meter-reading numbers:
- Greater Hartford: 860-727-3400
- Greenwich: 800-437-0444
Before submitting a reading:
- Locate the gas meter.
- Record the reading carefully.
- Have the CNG account information available.
- Use the correct number for the service area.
Do not attempt to access a meter when doing so would create an unsafe condition.
CNG Payment Arrangements and Past-Due Bills
Customers who are having trouble paying a Connecticut Natural Gas bill should contact the company before the account reaches the disconnection stage.
CNG currently lists:
for Credit & Collections.
Hours are Monday-Friday from 8:00 AM to 6:00 PM ET.
CNG offers flexible payment arrangements and says qualifying residential arrangements can extend for as long as 18 months, depending on the customer’s situation and applicable rules.
If financial circumstances change while you are already on a payment arrangement, contact CNG to ask whether the arrangement can be reviewed.
Connecticut Natural Gas Financial Assistance
CNG currently provides or participates in several assistance programs for qualifying customers.
Programs can include:
- Connecticut Energy Assistance Program (CEAP): Assistance with qualifying winter heating costs.
- Matching Payment Program: Helps qualifying customers reduce past-due balances through customer payments, energy assistance, and matching utility credits.
- Winter Protection Program: Provides qualifying hardship customers protection from winter utility shutoff.
- Flexible Payment Arrangements: Extended payment options for customers who cannot immediately pay the entire balance.
- Generation Power CT: Emergency energy and utility assistance for qualifying Connecticut households.
- Home Energy Solutions-Income Eligible: Energy-efficiency services for qualifying households.
Eligibility, income guidelines, enrollment periods, and program names can change.
Use the official CNG Help With Bill page for current information.
CNG Winter Protection
Connecticut provides special winter protections for qualifying utility customers experiencing financial hardship.
The winter moratorium generally runs from November 1 through May 1 for eligible customers who heat with gas or electricity and meet hardship requirements.
Customers must apply and qualify for the applicable protection.
Winter protection does not erase the balance owed. CNG encourages customers to arrange payments and apply for available energy-assistance programs.
Starting or Stopping Connecticut Natural Gas Service
CNG provides online tools for moving customers.
Customers can:
- Start natural gas service
- Stop existing service
- Transfer service to another eligible address
CNG Customer Care can also assist Monday-Friday from 8:00 AM to 6:00 PM ET.
For Greater Hartford, call 860-524-8361.
For Greenwich, call 203-869-6900.
When moving, have:
- Current service address
- New address
- Requested start or stop date
- Account information
- Contact information
available.
Where Does Connecticut Natural Gas Provide Service?
CNG currently serves approximately 190,000 natural-gas customers across 25 Connecticut communities, primarily in central Connecticut and Greenwich.
Its service territory includes communities in:
- Fairfield County
- Hartford County
- Middlesex County
- Tolland County
CNG is a regulated utility with a defined franchise territory. Customers generally do not choose among competing natural-gas distribution utilities at the same service address.
Paying a Connecticut Natural Gas Bill by Mail
CNG publishes a separate address specifically for payments:
Connecticut Natural Gas
P.O. Box 847820
Boston, MA 02284-7820
This is a payment-only address.
Do not mail correspondence, claims, service requests, or emergency reports to the payment-processing address.
Use the payment address printed on the most recent CNG bill if it differs from an older address found online.
CNG Property Damage Claims
CNG provides an online Property and Casualty Claim form for customers who believe property damage may involve the utility.
Before filing a claim, gather:
- Service address
- Date and approximate time of the event
- Description of what occurred
- Photographs
- Repair estimates or receipts
- Other documentation relevant to the claim
Submitting a claim does not guarantee reimbursement. CNG must review the circumstances and determine whether responsibility exists.
Connecticut Natural Gas Scam Warning
Utility customers can be targeted by callers, emails, text messages, or people at the door claiming immediate payment is required to prevent disconnection.
Warning signs can include:
- Threatening immediate shutoff unless payment is made at once
- Demanding prepaid debit cards or gift cards
- Demanding payment for a meter replacement
- Requesting bank or credit-card information during an unsolicited call
- Claiming you overpaid and requesting financial information for a refund
- Unannounced visitors requesting access to the home
If a call or message seems suspicious, end the communication and call CNG directly using the number published on CNGcorp.com or the customer’s current bill.
Never use the telephone number supplied by a suspicious caller, text, or email to verify the same message.
How to File a Complaint About Connecticut Natural Gas
For a billing, service, meter, payment, or other utility complaint:
- Contact CNG Customer Care first.
- Explain the disputed bill, service problem, or requested correction.
- Ask for additional review when the first representative cannot resolve the issue.
- Keep bills, meter readings, payment confirmations, correspondence, and case information.
If CNG does not resolve the matter satisfactorily, customers can contact the Connecticut Public Utilities Regulatory Authority (PURA).
PURA’s Customer Affairs Unit handles complaints involving issues such as:
- High bills
- Termination and reconnection
- Payment arrangements
- Meter testing
- Service quality
- Deposits
- Rates and tariffs
- Service installation
PURA currently lists its toll-free consumer number as:
Customers should normally give CNG an opportunity to resolve the problem before escalating it to PURA.
Who Owns Connecticut Natural Gas?
Connecticut Natural Gas Corporation is an Avangrid company.
Avangrid’s utility network also includes other electric and natural-gas companies in the Northeast.
Avangrid is a member of the Iberdrola Group. Iberdrola completed its acquisition of the remaining Avangrid shares in December 2024, making Avangrid a privately held Iberdrola subsidiary.
For ordinary CNG billing, gas service, payment, meter, or emergency matters, customers should contact Connecticut Natural Gas directly rather than Avangrid or Iberdrola.
Connecticut Natural Gas Corporate Address
Current CNG corporate documentation uses:
Connecticut Natural Gas Corporation
180 Marsh Hill Road
Orange, CT 06477
The older 60 Marsh Hill Road address previously shown on this page should not be treated as CNG’s current general corporate address.
Payments should not be mailed to the corporate address. Use the payment address provided by CNG instead.
Connecticut Natural Gas Customer Service Reviews and Complaints
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Because no reviews have been submitted on this page, there is not enough CustomerServiceNumbers.com feedback to identify current praise or complaint patterns involving CNG billing, gas service, meter readings, payment arrangements, service reliability, or customer support.
If you have recently contacted CNG, you can share your experience below. Helpful reviews explain the issue, which support number or service route was used, how CNG responded, and whether the matter was resolved.
Frequently Asked Questions
What is the Connecticut Natural Gas customer service phone number?
Greater Hartford customers can call 860-524-8361. Greenwich customers can call 203-869-6900.
What are CNG customer service hours?
Live Customer Care is currently available Monday-Friday from 8:00 AM to 6:00 PM Eastern Time. Automated telephone support is available 24/7.
What is the Connecticut Natural Gas emergency number?
For a suspected natural gas leak or other gas emergency, leave the area and call 866-924-5325 or 911 from a safe location.
What is the CNG Credit & Collections phone number?
Call 844-383-8827, Monday-Friday from 8:00 AM to 6:00 PM ET.
How do I submit a CNG meter reading?
Greater Hartford customers can call 860-727-3400. Greenwich customers can call 800-437-0444.
Can CNG help if I cannot pay my gas bill?
Yes. CNG provides payment arrangements and participates in several Connecticut energy-assistance programs. Contact Credit & Collections promptly if you are having trouble paying.
How do I start or stop CNG service?
Use CNG’s online Moving tools or call Customer Care for the applicable service area.
Who regulates Connecticut Natural Gas?
Connecticut Natural Gas is regulated by the Connecticut Public Utilities Regulatory Authority, commonly called PURA.
Who owns Connecticut Natural Gas?
CNG is an Avangrid company. Avangrid is part of Iberdrola Group.
Where is Connecticut Natural Gas located?
Current CNG corporate documentation uses 180 Marsh Hill Road, Orange, Connecticut 06477.
Related Customer Service Pages
Why Trust CustomerServiceNumbers.com?
CustomerServiceNumbers.com has helped consumers locate customer-service information and share customer experiences since 2004. This website is independent and is not owned or operated by Connecticut Natural Gas, Avangrid, Iberdrola, or the Connecticut Public Utilities Regulatory Authority.
The purpose of this page is to help customers locate current official support routes for natural gas emergencies, billing, payments, meter readings, financial assistance, moving service, claims, and unresolved utility complaints.
Share Your Connecticut Natural Gas Customer Service Experience
If you have contacted CNG about a gas bill, payment arrangement, meter reading, start or stop service request, account problem, financial-assistance program, property claim, or another customer-service matter, describe the issue, support route used, response received, and whether the problem was resolved.
Privacy warning: Do not post complete account numbers, payment information, Social Security numbers, passwords, medical or hardship documentation, meter-access details, home-access information, or other sensitive personal information.
Customer Service Information Disclaimer
CustomerServiceNumbers.com is an independent information and review website and is not affiliated with Connecticut Natural Gas Corporation, Avangrid, Iberdrola, PURA, or any energy-assistance organization.
CustomerServiceNumbers.com cannot access CNG accounts, report gas emergencies, change utility service, correct bills, arrange payments, submit meter readings, approve financial assistance, resolve property claims, or act on behalf of CNG.
For a suspected natural gas leak, leave the area immediately and call CNG at 866-924-5325 or 911 from a safe location.
Customer-service numbers, hours, payment addresses, assistance programs, utility rules, rates, and company information can change. Verify important information directly through CNGcorp.com and the customer’s current bill.