Columbia SC.  In 2017 Columbia adopted a Clean Energy Resolution, becoming the first city in South Carolina to commit to a transition to 100% clean energy.  To help meet this goal, Columbia is carrying out a thorough energy efficiency audit, planning a solar-powered wastewater facility, and transitioning municipal operations to 100% renewable energy. www.cleantechnica.com/2018/09/28/the-us-is-ready-for-100-clean-energy-10-cities-model-how/  The other 9 cities named in the article are: Concord NH; Denton TX; Denver CO; Fayetteville AR; Minneapolis MN; Norman OK; Orlando FL; Santa Barbara CA; and St. Louis MO.