WASHINGTON — The price for power plants to emit 1 ton of carbon dioxide in nine northeastern states cleared at a record $4 per short ton at the Regional Greenhouse Gas Initiative’s 23rd permit auction, the market’s administrator said Friday.

The electronic auction, held on Wednesday, raised a total of $93.96 million that can be used by the participating states to invest in clean energy and other consumer benefit programs.

All of the 18.5 million emissions allowances offered at the auction were sold.

Another 5 million “cost containment reserve allowances” also were sold. Those are extra allowances only available for sale if CO2 prices exceed certain benchmarks.

Electricity generators and their corporate affiliates bought 45 percent of allowances. The rest were bought by speculators or other groups that may want to “retire” the credits.

The stronger than expected auction results sent the price of RGGI allowance contracts higher on the secondary market on Friday, one carbon broker said, with the spot contract trading for as high at $4.30 a ton on the IntercontinentalExchange.

The broker said that emitters who failed to secure allowances at the auction were behind most of Friday’s secondary market buying.

Wednesday’s auction was the first after members recently made the program more stringent by lowering the collective carbon emission cap by 45 percent to 91 million short tons for 2014. This would then decline by 2.5 percent each year from 2015 to 2020.

“Our first auction under the new cap demonstrates how market-based programs cost-effectively reduce carbon pollution while driving investments in a clean energy economy,” said Collin O’Mara, vice chairman of the Regional Greenhouse Gas Initiative and secretary of Delaware’s Department of Natural Resources.

The initiative targets emissions from power plants in Connecticut, Delaware, Maine, Maryland, Massachusetts, New Hampshire, New York, Rhode Island and Vermont.

Officials in those states are making a strong push for the U.S. Environmental Protection Agency to recognize the program as a model for other states to help them meet forthcoming regulations that will curb carbon emissions from the country’s more than 1,000 power plants.

The EPA has not yet released details of the proposal, which is expected in June, but has been seeking comment from states, which will be responsible for designing plans for their power plants to comply with future federal rules.

RGGI states have submitted comments to the EPA describing why regional cap-and-trade programs such as RGGI should be allowed as a way for states to achieve greenhouse gas standards and asking it to get credit for the early action taken by RGGI’s members.

RGGI held its first quarterly allowance auction in 2008.

A report released in February by RGGI’s program administrator, RGGI Inc., found that auction proceeds to date are projected to return more than $2 billion in lifetime energy bill savings to more than 3 million households and 12,000 businesses in the region.

The report said 73 percent of the state-invested RGGI funds have gone to energy efficiency programs in the region.

Also on Friday, Quebec released the results of its latest carbon permit auction. The province, which is expected to link to California’s carbon market later this year, sold 99 percent of the allowances it offered to cover emissions in 2014. The allowances cleared at the program’s auction floor price of C$11.39 ($10.29).

That marks a significant jump in demand from Quebec’s inaugural auction in December, where it sold just 34 percent of the current year allowances it offered.

Demand was weaker for allowances covering emissions in 2017, with the province selling just 84 percent of those allowances, also for the floor price of C$11.39 a ton. Qualified bidders at the auction included oil, metals and energy infrastructure companies, the government said in a press release.