'Non-detect' doesn't mean the contaminant is absent. It means the lab couldn't find it at the level they tested for. Here's how to read it properly.

Lab reports are full of acronyms that look interchangeable but mean very different things. Here's a clean translation, with examples.

Elevated indoor mold counts almost never mean what the internet tells you they mean. Here's a calm, step-by-step way to interpret your air sample.