A new study has ranked Iowa among the top five states in the country for “clean” jobs. Iowans can thank a favorable mix of attributes that makes their state a magnet for creating clean-energy jobs, according to a new index that aggregates a variety of sustainability indicators for all 50 states.

According to the Clean Jobs Index, developed by the EcoTech Institute in Aurora, Colo., Iowa was fifth in the nation for growth in new clean-job postings in the country in the first quarter of 2013. It also was among the five top-ranking states for combined sustainability measures that are aggregated by the index.

Iowa had a 32 percent increase in clean job postings in the first quarter compared with the fourth quarter of 2012, with more than 13,000 positions available. By comparison, the average increase in clean jobs nationally for that period was 7 percent.

“Iowa has done such a great job of bringing clean energy jobs to the state,” said Keri Burnett, director of marketing for EcoTech Institute.

The index represents a compilation of four factors: each state’s clean energy job postings, its renewable energy portfolio, financial incentives and its combined ranking in six “clean jobs indicators.” Those clean jobs indicators include measures such as the number of Leadership in Energy and Environmental Design (LEED) construction projects and how many households are enrolled in net metering programs.