New year but no new air as the 25th "Spare the Air" alert was issued for Thursday.

The Bay Area Air Quality Management District has banned wood burning both indoors and outdoors on Jan. 2, making it illegal to burn wood, manufactured fire logs or solid fuels for 24 hours.

The wood-burning ban will be in effect for the same counties affected on New Year's Day: Alameda, Contra Costa, Marin, Napa, San Francisco, San Mateo, Santa Clara, southern Sonoma and southwestern Solano counties.

Caused by particulates or soot pollution from wood smoke, air pollution in the winter can impact illnesses, including asthma, bronchitis and lung disease,

First-time violators of the ban may be subject to a $100 fine or be given the option of taking a wood smoke awareness class. Subsequent violations will result in fines of $500 or more.

The "Spare the Air" season ends Feb. 28.

Follow Katie Nelson at Twitter.com/katienelson210.