Black mold spreading across a water-stained wall in an aging apartment
An investigation

The mold epidemic America won't face

Chronic mold has become an epidemic as severe as lead paint. It spreads through the walls and floorboards of older homes, sickens the families who breathe it, and is left untouched by the landlords who profit and the governments that look away.

◆47% of US housing stock was built before 1980◆Mold appeared on the federal housing inspection checklist only in 2023◆Corporate entities own at least 44% of US rental housing◆Asthma costs Americans more than $80 billion over five years◆In New Haven's lowest-income neighborhoods, asthma rates reach 23%◆LLC-owned properties are less likely to be up to code◆Climate-fueled flooding is accelerating mold outbreaks◆47% of US housing stock was built before 1980◆Mold appeared on the federal housing inspection checklist only in 2023◆Corporate entities own at least 44% of US rental housing◆Asthma costs Americans more than $80 billion over five years◆In New Haven's lowest-income neighborhoods, asthma rates reach 23%◆LLC-owned properties are less likely to be up to code◆Climate-fueled flooding is accelerating mold outbreaks

The shape of the crisis

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47%
of US homes built before 1980

Aging stock is the substrate for chronic mold.

2023
the year mold joined the federal inspection checklist

Decades after lead paint was banned in 1978.

44%
of US rentals owned by corporate entities

Studies show poorer maintenance records.

$80B+
in asthma costs, 2008–2013

Roughly half borne by public insurance.

“
The wall, the door, the floor — everything is full of mold.

— A mother of an infant hospitalized three times

Inside the investigation

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