Even on the coldest days and nights, Alicia Orozco keeps the furnace in her Cotati condominium switched off and the windows partially open.
Orozco, 33, and her 2-year-old daughter bundle up against the chill and use space heaters for meager warmth for the sake of their health, she said.
"Living here has been nothing less than a nightmare," said Orozco, a divorced single mother.
Her condo shares attic space with a neighbor who smokes tobacco, and turning on the furnace draws air laden with secondhand smoke from the attic into their two-bedroom home.
Her plight has drawn support from from city and county officials, a state lawmaker and American Lung Association advocates, who all see California moving slowly and unevenly toward the protection Orozco wants.
The cold is uncomfortable and keeps friends and family from visiting, but Orozco won't tolerate the risk of smoke-tainted air.
"I'm afraid for our health," she said, sitting at her kitchen table and wearing a black insulated jacket.
Behind her, a $1,200 air filter runs 24/7, an imperfect defense against the secondhand smoke that still leaks in from the attic through two ceiling vents.
Orozco's entreaties to the neighbor and to the condo homeowners association have gotten no results, and she has lobbied city officials for help.
She's become a poster child for the American Lung Association's campaign to get cities in Sonoma County and throughout California to ban indoor smoking in multiunit dwellings.
"People have a right to breathe clean air," said Kimberly Amazeen, an official with the American Lung Association in California. "They should feel the safest in their home."
Since 2007, 33 California cities and counties have prohibited smoking in some or all of the units in apartments, condominiums and any other multifamily housing, the association says.
Cotati isn't among them, and it is surrounded by jurisdictions that are: Rohnert Park, Sebastopol, Petaluma and the unincorporated county area.
If Orozco's condo was four blocks farther east it would be in Rohnert Park, which enacted the county's first indoor residential smoking restrictions in 2009.
The Rohnert Park-Cotati line is "the Berlin Wall of secondhand smoke," said Timothy Brown, a Santa Rosa real estate broker who is sympathetic to Orozco's plight.
So is David Rabbitt, chairman of the Sonoma County Board of Supervisors, who wrote a letter in December to then-Mayor Mark Landman encouraging Cotati to adopt smoking limits in multi-unit housing.
Many multi-unit complexes provide an outdoor place to smoke, Rabbitt said in an interview. His own mother smoked, he said, "until her first heart attack."
Children exposed to secondhand smoke in their homes are at "high risk" for sudden infant death syndrome, ear infections, severe asthma attacks, respiratory infections and other impacts, the state's Tobacco Education and Research Oversight Committee said in a 2012 report.
The master plan of the 13-member state committee, which advises the Department of Public Health on tobacco control measures, said that state governments at all levels "should be encouraged to adopt and enforce additional policies to protect the public from secondhand smoke."
California still has 3.6 million smokers, and smoking remains the state's number one preventable cause of disease and death, the plan said.
Orozco said her daughter has suffered an ear infection and six upper respiratory tract infections in the past year.