You finished the floors on Saturday.
The lead dust is still there on Sunday.
One square foot of sanded lead paint generates enough fine dust to contaminate your entire ground floor. Ordinary vacuums pull it through the filter and back into the air. Standard cleaning spreads it further.
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THE 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.
1 sq ft
of sanded pre-1978 paint generates enough dust to push floor lead above HUD clearance level across an entire room
72 hrs
lead dust can remain airborne in an unventilated space after a disturbance event
HEPA only
standard vacuums redistribute lead dust; only HEPA-certified vacuums and wet-wiping with phosphate solution clear it effectively
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 renovation spreads lead through a home
Disturbing old paint is not the end of the risk , it is the beginning. Lead dust travels through air, settles on every surface, and resists ordinary cleaning.
1
Pre-1978 paint disturbed by renovation
Sanding, scraping, and demo of surfaces with lead paint releases particles across a wide size range , from visible chips to invisible PM2.5 fine particles.
2
Fine particles travel through HVAC
Particles under 10 microns remain airborne long enough to enter heating and cooling systems, distributing lead through every room in the house.
3
Dust settles on all horizontal surfaces
Lead particles eventually settle, concentrating on floors, counters, windowsills, furniture, and toys , anywhere your child touches or crawls.
4
Normal cleaning redistributes dust
Dry sweeping, ordinary vacuuming, and dry mopping lift settled lead back into the air. The EPA RRP rule requires wet-wiping and HEPA vacuuming.
5
Baby crawls and ingests , silently
The child living in the home during or after renovation has no symptom of exposure. Parents often discover the blood lead number weeks later.
Lead dust generated per renovation task (pre-1978 home)
µg/m² generated across a standard room. EPA data. Fine particles (PM2.5) travel through HVAC and settle on all surfaces. Standard vacuums redistribute lead dust rather than capturing it.
HUD Clearance level for floors: 40 µg/ft². Sanding one square foot of lead paint can generate 10,000 µg/m² across the room. Source: EPA RRP rule; HUD Guidelines for the Evaluation and Control of Lead-Based Paint.
Pick a kit and start testing
One click adds the kit to your cart and takes you to checkout. Test the surfaces your child touches before the blood test does.
Most popular
Full Fluoro-Spec Test Kit
$75
Drip and spray together. About 600 tests.
Buy the full kit, $75
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
Pick a kit and start testing
One click adds the kit to your cart and takes you to checkout. Test the surfaces your child touches before the blood test does.
Most popular
Full Fluoro-Spec Test Kit
$75
Drip and spray together. About 600 tests.
Buy the full kit, $75
CLEAR IT BEFORE IT REACHES THE BLOOD TEST
Test your surfaces after renovation. Before your child goes back in.
FluoroSpec identifies lead on surfaces in 30 seconds. Test the floors, windowsills, and counters your child will use after work is done. If it glows, clean again. If it does not, you are clear.
DishesPotteryToysPainted surfacesSoil
JewelryVinylImported items
Tested by 50,000+ parents across 38 states. Results in 30 seconds. EPA TSCA LVE L-25-0206.