NOTICE OF PROPOSED RATE CHANGE Columbia Gas of Pennsylvania, Inc. (Columbia Gas or the Company) has filed a request with the Pennsylvania Public Utility Commission (PUC) for an increase in your natural gas distribution rates as of May 14, 2024. This notice describes the Company's rate request, the PUC's role, and what actions you can take. Columbia has requested an overall rate increase of $124.1 million per year. This filling also includes a request for approval of the following alternative rate mechanisms in accordance with 66 Pa. C.S. § 1330: a Revenue Normalization Adjustment mechanism to stabilize utility revenue regardless of changes in actual customer usage that would become effective with the January 2025 billing cycle and a request to remove the dead band associated with the currently effective Weather Normalization Adjustment. The filing also includes a request for approval of a Municipal Levelization Charge, which would further increase bills issued to residents of the City of Pittsburgh and Perryopolis, and decrease bills issued to residents of Roscoe Borough and New Sewickley. If the Company's entire request is approved, the total bill for a residential customer who purchases 70 therms of gas from Columbia per month would increase from $118.16 to $136.92 per month, or by 15.88 percent. The total bill for a small commercial customer using 150 therms of gas purchased from Columbia per month would increase from $196.43 to $226.24, or by 15.18 percent. Rates for a small industrial customer using 1,215 therms of gas from Columbia per month would increase from $1,281.25 to $1,452.98 per month, or by 13.40 percent. If the Company's Municipal Levelization Charge is approved, customers located in the City of Pittsburgh and Perryopolis would be billed $0.70 per month in addition to the increases described above. Bills for customers located in Roscoe Borough and New Sewickley Township would increase as described above, but they would receive a monthly bill credit of $7.44. To find out your customer class or how the requested increase might affect your gas bill, call Columbia Gas at 1-888-460-4332. The rates requested by the Company may be found in proposed Columbia Gas Service Tariff No. 9-Supplement No. 373 which is available at https://www.columbiagaspa.com/our-company/about- us/regulatory-information. You may examine the material filed with the PUC, which explains the requested increase and the reasons for it. Á copy of this material is kept at Columbia's office. Upon request, the Company will send you a statement of reasons for Supplement No. 373, explaining why the rate increase has been requested. The state agency that approves rates for public utilities is the PUC. The PUC will examine the requested rate increase and can prevent existing rates from changing until it investigates and/or holds hearings on the request. The Company must prove that the requested rates are reasonable. After examining the evidence, the PUC may grant all, some, or none of the request, or may reduce existing rates. The PUC may change the amount of the rate increase requested by the utility for each customer class. As a result, the rate charged to you might be different than the rate requested by the Company as shown above. There are three ways to challenge a company's request to change its rates: 1. You may file a formal complaint. If you want a hearing before a judge, you must file a formal complaint. By filing a formal complaint, you assure yourself the opportunity to take part in hearings about the rate increase request. All complaints should be filed as soon as possible. If no formal complaints are filed, the PUC may grant all, some, or none of the request without holding a hearing before a judge. 2. You may send the PUC a letter telling why you object to the requested rate increase. Sometimes there is information in these letters that makes the PUC aware of problems with the company's service or management. This information can be helpful when the PUC investigates the rate request. Send your letter or request for a formal complaint form to the Pennsylvania Public Utility Commission, P. O. Box 3265, Harrisburg, PA 17105- 3265. Your letter or formal complaint can be filed electronically with the PUC. Information regarding electronic filing is available at https://efiling.puc.pa.gov/. 3. You may be a witness at a public input hearing. Public input hearings are held if the PUC opens an investigation of the company's rate increase request and if there are a large number of customers interested in the case. At these hearings, you have the opportunity to present your views in person to the PUC judge hearing the case and the company representatives. All testimony given "under oath" becomes part of the official rate case record. These hearings are held in the company's service area. For more information, call the PUC at 1-800-692-7380. You may leave your name and address so that you can be notified of any hearings that may be scheduled in this case. Columbia Gas ANISource Company adno-323813 NOTICE OF PROPOSED RATE CHANGE Columbia Gas of Pennsylvania , Inc. ( Columbia Gas or the Company ) has filed a request with the Pennsylvania Public Utility Commission ( PUC ) for an increase in your natural gas distribution rates as of May 14 , 2024. This notice describes the Company's rate request , the PUC's role , and what actions you can take . Columbia has requested an overall rate increase of $ 124.1 million per year . This filling also includes a request for approval of the following alternative rate mechanisms in accordance with 66 Pa . C.S. § 1330 : a Revenue Normalization Adjustment mechanism to stabilize utility revenue regardless of changes in actual customer usage that would become effective with the January 2025 billing cycle and a request to remove the dead band associated with the currently effective Weather Normalization Adjustment . The filing also includes a request for approval of a Municipal Levelization Charge , which would further increase bills issued to residents of the City of Pittsburgh and Perryopolis , and decrease bills issued to residents of Roscoe Borough and New Sewickley . If the Company's entire request is approved , the total bill for a residential customer who purchases 70 therms of gas from Columbia per month would increase from $ 118.16 to $ 136.92 per month , or by 15.88 percent . The total bill for a small commercial customer using 150 therms of gas purchased from Columbia per month would increase from $ 196.43 to $ 226.24 , or by 15.18 percent . Rates for a small industrial customer using 1,215 therms of gas from Columbia per month would increase from $ 1,281.25 to $ 1,452.98 per month , or by 13.40 percent . If the Company's Municipal Levelization Charge is approved , customers located in the City of Pittsburgh and Perryopolis would be billed $ 0.70 per month in addition to the increases described above . Bills for customers located in Roscoe Borough and New Sewickley Township would increase as described above , but they would receive a monthly bill credit of $ 7.44 . To find out your customer class or how the requested increase might affect your gas bill , call Columbia Gas at 1-888-460-4332 . The rates requested by the Company may be found in proposed Columbia Gas Service Tariff No. 9 - Supplement No. 373 which is available at https://www.columbiagaspa.com/our-company/about- us / regulatory - information . You may examine the material filed with the PUC , which explains the requested increase and the reasons for it . Á copy of this material is kept at Columbia's office . Upon request , the Company will send you a statement of reasons for Supplement No. 373 , explaining why the rate increase has been requested . The state agency that approves rates for public utilities is the PUC . The PUC will examine the requested rate increase and can prevent existing rates from changing until it investigates and / or holds hearings on the request . The Company must prove that the requested rates are reasonable . After examining the evidence , the PUC may grant all , some , or none of the request , or may reduce existing rates . The PUC may change the amount of the rate increase requested by the utility for each customer class . As a result , the rate charged to you might be different than the rate requested by the Company as shown above . There are three ways to challenge a company's request to change its rates : 1. You may file a formal complaint . If you want a hearing before a judge , you must file a formal complaint . By filing a formal complaint , you assure yourself the opportunity to take part in hearings about the rate increase request . All complaints should be filed as soon as possible . If no formal complaints are filed , the PUC may grant all , some , or none of the request without holding a hearing before a judge . 2. You may send the PUC a letter telling why you object to the requested rate increase . Sometimes there is information in these letters that makes the PUC aware of problems with the company's service or management . This information can be helpful when the PUC investigates the rate request . Send your letter or request for a formal complaint form to the Pennsylvania Public Utility Commission , P. O. Box 3265 , Harrisburg , PA 17105- 3265. Your letter or formal complaint can be filed electronically with the PUC . Information regarding electronic filing is available at https://efiling.puc.pa.gov/ . 3. You may be a witness at a public input hearing . Public input hearings are held if the PUC opens an investigation of the company's rate increase request and if there are a large number of customers interested in the case . At these hearings , you have the opportunity to present your views in person to the PUC judge hearing the case and the company representatives . All testimony given " under oath " becomes part of the official rate case record . These hearings are held in the company's service area . For more information , call the PUC at 1-800-692-7380 . You may leave your name and address so that you can be notified of any hearings that may be scheduled in this case . Columbia Gas ANISource Company adno - 323813