Denver Post, Exhibit 1 Date: July 1, 2013 NOTICE OF A CHANGE IN THE ELECTRIC RATES OF PUBLIC SERVICE COMPANY OF COLORADO 1800 LARIMER STREET, DENVER, COLORADO 80202 You are hereby notified that Public Service Company of Colorado has filed with the Colorado Public Utilities Commission an application seeking approval to revise its electric Demand-Side Management Cost Adjustment (DSMCA) tariff, to become effective January 1, 2014. The Company filed its Application for Approval of its Electric DSM Plan for Calendar Year 2014 and to change its Electric DSMCA rates effective January 1, 2014. The Electric DSMCA, which together with the Company’s electric base rates, recovers the 2014 electric DSM budget of $87.8 million, the Company’s 2014 ISOC budget of $29.2 million, and the budget for third party demand response of $3 million, will result in an increase in the residential electric DSMCA and an increase in the commercial electric DSMCA. The effect of the change in E-DSMCA rates introduced in this filing will be a net increase of $5.2 million in the Company’s annual E-DSMCA revenues relative to the E-DSMCA annual revenues from rates currently in effect. The combined average monthly impact for customers by rate class is projected to be as follows: Rate Class Monthly Average Use Monthly Current Monthly Proposed Monthly Monthly Bill Bill DifferenceImpact Residential R 632 kWh $ 75.21 $ 75.36 $0.15 0.20% Commercial C 1123 kWh $144.25 $144.50 $0.25 0.17% Secondary 51.49% L.F. General SG 26,685 kWh $2,593.46 $2,598.53 $5.07 0.20% 71.00kW Primary 64.82% L.F. General PG 492,079 kWh $38,637.30 $38,711.56 $74.26 0.19% 1040.00 kW Transmission 72.68% L.F. General TG 12,889,873 kWh $824,403.89 $825,890.69 $1,486.80 0.18% 24,294 kW The proposed and present tariffs are available for examination and explanation at the business office of Public Service Company of Colorado, located at 1800 Larimer, Suite 1400, Denver, CO, and at the office of the Public Utilities Commission in Denver, Colorado. Customers who have questions may call the Commission at (303) 894-2000, Xcel Energy at 1-800-895-4999, fax to Xcel Energy at 1-800-895-2895, or e-mail to inquire@xcelenergy.com . Anyone who desires may file written objection. The filing of a written objection by itself will not allow you to participate as a party in any proceeding on the proposed rate changes. If you wish to participate as a party in any proceeding established in these matters, you must file written intervention documents under Rule 1401 of the Commission Rules of Practice and Procedure or any applicable Commission orders. Anyone who desires to file a written objection to the proposed action shall file it with the Colorado Public Utilities Commission, 1560 Broadway, Suite 250, Denver, Colorado, 80202, or email it to dora_puc_complaints@state.co.us 10 days before the proposed effective date. The Public Utilities Commission may hold a hearing to determine what rates, rules and regulations will be authorized. If a hearing is held, the Commission may suspend the proposed rates, rules or regulations. The rates, rules and regulations ultimately authorized may or may not be the same as those proposed and may include rates higher or lower than those proposed or currently in effect. Anyone who desires to receive notice of any hearing shall file a written request for notice with the Public Utilities Commission at the above address or alternatively shall contact the External Affairs Section of the Public Service Utilities Commission at 303 894-2070 or toll free 1-800-456-0858 10 days before the proposed effective date. If a hearing is held, any member of the public may attend and may make a statement under oath about the proposed increase, whether or not he or she has filed an objection or intervention. Scott B. Brockett Director, Regulatory Administration