Built before '78?
Lead is already inside the walls.
87% of homes built before 1940 have lead paint. When paint chips, cracks, or is disturbed by renovation, it becomes dust. Your baby crawls through that dust. Every day.
Test Before the Blood Test → Get 2 Kits $99THE CRITICAL WINDOW
Your pediatrician tests blood lead at 12-24 months.
If the number comes back elevated, the exposure already happened. The doctor will say "reduce sources" , but won't tell you which ones, or where they are. The window to prevent the damage is before the blood test, not after.
Lead accumulates silently. There is no pain, no rash, no symptom until the damage is severe. The only way to know is to test the sources.
What lead does to a developing brain
These numbers are not projections. They are measured outcomes from studies of hundreds of thousands of children. Lead is not a risk factor for cognitive decline , it is a cause.
87%
of US homes built before 1940 have lead paint hazards (HUD National Lead Survey)
31M
US homes still contain actionable lead paint , the #1 source of childhood lead exposure
0.7mg
of floor dust per day is enough to push a toddler above the CDC 3.5 µg/dL reference level
This is what lead did to an entire generation.
The curve follows the gas pump. Leaded gasoline, burned in 200 million cars for 70 years, exited tailpipes as airborne particulates and entered children through air, dust, and soil. Press play.
Child blood lead in the US, 1925-2020
Geometric mean µg/dL for children ages 1-5 (NHANES II/III/Continuous) overlaid on tetraethyl lead added to US gasoline (EPA). Sources: NHANES CDC, ATSDR, Annest 1983, Mahaffey 1982.
1925
824M
IQ points erased from the US population by leaded gasoline exposure (McFarland et al. 2022, PNAS)
$50.9B
estimated annual cost of lead-attributable cognitive losses in the US (Trasande & Liu 2011)
0.65
µg/dL , today's geometric mean for US kids. Down from 15+ in 1970. Proof that removing the source works.
How paint becomes poison
Lead does not stay in the wall. Over time, through weathering, friction, or renovation, it migrates from painted surfaces into household dust , and from dust into your child.
1
Lead paint applied to surfaces
Between 1920 and 1978, lead carbonate and lead oxide pigments were standard. A typical pre-1940 coat contains 10,000-50,000 ppm lead.
2
Paint deteriorates or is disturbed
Friction from windows and doors, water damage, or renovation releases fine particles. You cannot see lead dust. It has no color or smell.
3
Dust settles on floors and surfaces
Lead particles are heavy. They fall and concentrate on floors, windowsills, and low surfaces , exactly where toddlers spend their time.
4
Baby crawls, touches, mouths hands
Children ages 6-36 months ingest 100-400mg of dust per day through normal hand-to-mouth behavior. Lead is absorbed at 4-5x the adult rate.
5
Lead enters the bloodstream and brain
Blood lead accumulates silently. No symptom. No pain. Cognitive damage occurs while the child appears completely healthy.
Lead dust generated by household activity
In pre-1978 homes. µg/m² per hour of activity. HUD National Lead Survey + EPA data. A toddler ingesting 0.7mg of floor dust per day can reach the CDC reference level.
The damage is dose-dependent. And there is no safe dose.
Both charts below represent the same body of research looked at two different ways: IQ loss as a function of blood lead level, and ADHD risk by exposure quartile. Neither has a zero-risk threshold.
How lead erases IQ points
Lanphear et al. 2005 (n=1,333): IQ loss is steepest at the lowest exposures. There is no safe level. Hover a point for details.
0 µg/dL , no detectable lead
3.5 µg/dL , CDC reference
20 µg/dL , 1970s US average
The earnings effect
Salkever 1995 calculated a 2% reduction in lifetime earnings per IQ point lost. At 5 µg/dL , slightly above the CDC reference , that is roughly $80,000-$190,000 in lost lifetime earnings per child (Boyle et al. 2021, adjusted for current wages). Lead is not a health problem. It is an economic problem wearing a health problem's coat.
Find the source before the blood test does.
FluoroSpec is a perovskite quantum dot reagent. When it contacts lead , in paint, glaze, dust, or soil , it forms fluorescent crystals that glow bright green under UV. Positive result in 30 seconds. No lab. No waiting.
30s
Result time per surface
⬤
Green glow = lead present
∞
Tests per kit (30-50 surfaces)
EPA
TSCA LVE L-25-0206 registered
FIND IT BEFORE THE BLOOD TEST DOES
Test your home. Not your kid's blood.
FluoroSpec identifies lead in paint, dust, and surfaces in 30 seconds. Test the rooms your child uses most before the 12-month pediatrician appointment.
DishesPotteryToysPainted surfacesSoil
JewelryVinylImported items
Tested by 50,000+ parents across 38 states. Results in 30 seconds. EPA TSCA LVE L-25-0206.