From the AP via San Diego Union-Tribune (Air regulators push ...):
State and local air regulators unhappy with the Bush administration's approach to mercury pollution offered a competing plan Monday that would require coal-burning power plants to cut mercury emissions more deeply and more quickly and would raise home electric bills throughout the East and Midwest about a dollar a month.
...
The twin trade groups for the State and Territorial Air Pollution Program Administrators and the Association of Local Air Pollution Control Officials said their "model rule" for states to adopt would add $1 a month to the average household's utility bills. But they said they lacked a national cost estimate for their plan.
Hmm. I haven't read anything past the AP article, but isn't the cost estimate the product of $12/year and the number of households affected? Or, does the $1/month not apply for the rest of the country?