After a winter of soaring heating bills, Massachusetts households that get their gas from Eversource will benefit from lower prices this summer.
Eversource, which supplies natural gas to 300,000 people in Central and Eastern Massachusetts, said the average bill this summer would be below $33 a month, almost 20 percent less than last summer’s rate of $40 a month.
High rates and usage during the winter pushed bills to an average of $171 a month, the company said earlier this year.
The drop is caused by a steep decrease in the supply cost of gas, which fell from nearly 57 cents per therm last year to 31 cents this summer. The company negotiates those rates with gas suppliers and doesn’t make a profit on them, said an Eversource spokesman. Delivery charges are mostly unchanged, so the overall bill decrease was less sharp.
National Grid, which supplies gas to the North Shore and Cape Cod, also is charging less this summer. According to figures approved in March, the average National Grid household will pay $29, down from $36, a 19 percent drop.
Electricity bills will be higher than last summer’s, however.
Eversource’s summer gas rates go into effect this month. Its electricity rates, which the company also expects to drop, are set according to a different process and go into effect in July. Eversource supplies 1.4 million customers with electricity.