Piedmont Natural Gas Invites You to Join Its Third Quarter Conference Call on the Web

CHARLOTTE, N.C., Aug. 26 /PRNewswire-FirstCall/ — Piedmont Natural Gas expects to release its third quarter earnings during normal market trading hours on September 2, 2005, followed by a conference call on September 8, 2005. You are invited to listen to the conference call that will be broadcast live over the Internet on September 8, 2005, at 2:30 p.m. Eastern time.

    What:    Piedmont Natural Gas Third Quarter Earnings Conference Call     When:    September 8, 2005, at 2:30 p.m. ET     Where:   The Investor Relations area of the Piedmont Website at             http://www.piedmontng.com/     How:     Live over the Internet — Simply log on to the web at the above             address and go to Investor Relations, presentations   

If you are unable to participate during the live webcast, a replay of the webcast will be archived on the Website http://www.piedmontng.com/.

About Piedmont Natural Gas

Piedmont Natural Gas is an energy services company primarily engaged in the distribution of natural gas to 960,000 residential, commercial and industrial utility customers in North Carolina, South Carolina and Tennessee, including 60,000 customers served by municipalities who are wholesale customers. Our subsidiaries are invested in joint venture, energy-related businesses, including unregulated retail natural gas marketing, interstate natural gas storage, intrastate natural gas transportation and regulated natural gas distribution. More information about Piedmont Natural Gas is available on the Internet at http://www.piedmontng.com/ .

Piedmont Natural Gas

CONTACT: Media, David L. Trusty, +1-704-731-4391, ordavid.trusty@piedmontng.com , or Investors, Headen B. Thomas, +1-704-731-4438,or headen.thomas@piedmontng.com , both of Piedmont Natural Gas

Web site: http://www.piedmontng.com/