National Fuel customers will pay more for gas starting Aug. 1, the company announced Friday.

The monthly bill of a residential customer who uses 102,800 cubic feet of gas annually will increase by $22.98 - from $87.13 to $110.11.

The increase is primarily due to higher market prices for natural gas, which have increased the cost of natural gas supplies that National Fuel purchases for customers.

By law, gas supply costs are passed along to customers without mark-up or profit to National Fuel.

Pennsylvania utility companies can update gas supply charges on a quarterly basis to reflect market prices.

The next opportunity to adjust gas supply charges will be Nov. .

National Fuel customers who are having trouble paying their bills can call 1-800-365-3234 to discuss payment assistance programs.