The Fluoride Limit Was Written to Stop Crippling Bone Disease
Somebody set that ceiling in 1986 against a bone disease severe enough to stiffen your joints. What parents ask about…
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California Screens Soil Lead at 80 ppm. The EPA Waits Until 200
Lead from burned pre-1978 houses settles in the top inch or two of soil and stays there. The EPA screens…
Nothing Indoors Breaks Pesticide Down, so Every Application a House Ever Had Is Still in It
Outdoors, sun and rain finish a pesticide inside a season. Indoors nothing touches it, so a house keeps every application…
Women in the Greenest US Neighborhoods Died at a 12% Lower Rate. Nobody Has Shown the Park Did It
The big green space studies measure what a satellite saw, which cannot tell a park from a golf course. The…
Hard Water Is a Nuisance, and a Softener Puts Sodium in Every Glass You Pour
A softener doesn't take hardness out, it trades calcium for sodium: about 8 parts per million for every grain, so…
Mattress Covers Alone Did Nothing. Several Changes Together Cut a Child’s Symptom Days by 21 a Year
A federal panel rated nine home changes and found the evidence supports four. Which four depends on what the child…
No Federal Rule Says How Quiet a Bedroom Has to Be, and the Office Closed in 1982
Eight hours at a desk carries a limit an inspector can enforce. Eight hours asleep carries one figure from 1974…
That Pollen Number Came Off a Roof, and Somebody Read It Under a Microscope the Next Day
The sampler sits above the trees to catch regional air, and a lab reads the slide a day later. Whatever…
The Wind Speed Your Roof Was Nailed for Is on File at Your Building Department
Wind pulls a roof up the way air lifts a wing. Roof damage drives an estimated 70 to 90 percent…
Thinking Scores Fell 15% at 945 ppm. A Closed Bedroom Hits 4,000 by Morning
Outdoor air is about 428 ppm. A closed, unventilated bedroom reaches 2,000 to 4,000 ppm overnight. The 5,000 ppm limit…
A Dog Can Die Within Hours of Swallowing Lake Water, and No Safe Level Exists for Them
A dog gulps while it swims, then spends 10 or 15 minutes licking the rest out of its coat. That…
Somebody Drew Your Block by Hand a Century Ago and Wrote Down What Was Inside It
Fire insurance maps labeled every building by what went on in it. Auto repair. Dry cleaning. Coal yard. Tannery. Those…
No US Agency Sets an EMF Limit for a Bedroom. FCC Rules Cover a Different Frequency
FCC exposure limits are enforceable and cover radiofrequency transmitters. Household wiring runs at 60 hertz and falls outside them entirely…
Any Mold You Can See Is Already Past the First Band of Concern
No federal limit exists for mold or its spores, so no lab result can tell you a house passed. What…
Wildfire Smoke Hits Your Heart Hardest 2 Days After the Worst Air
Cardiac arrests across 14 California counties rose with heavy wildfire smoke, and the risk peaked two days afterward rather than…
Your Air Purifier Cleans Most of Your Living Space, Except for Colds
An air purifier is a particle machine. It works on cooking smoke, wildfire haze, pollen and dust, and one trial…
FEMA Paid 29% of Flood Claims to Houses Outside High-Risk Zones
A flood zone answers one question: whether a bank can require coverage. From 2014 to 2024, 29 percent of federal…
9 Out of 10 Homes Pass a Water System Test. Yours Could Be the One That Fails
A utility passes its lead test when 9 sampled homes in 10 come in under the line. Home number 10…
You’ll Need to Test More Than Once to Get Your True Radon Reading
One short test catches whichever two days it sat there, and radon moves with heating, rain, wind and an open…
Your Gas Stove Leaks More With the Knobs Off Than While You Cook
Researchers measured 53 American kitchens and found more than three-quarters of a gas stove's methane escaped while every knob was…
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Air quality, mold, EMF, light and water all shape how a house feels and how the people in it feel. Whatever your concern is, the first step is finding out what is there.
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