Testing & Assessment
Mold Inspection & Testing in Ontario, CA
An assessment establishes whether mold is present, where it is growing, and how far it extends — before anyone quotes removal. A mold inspection locates moisture and growth that a room-level look would miss, reading wall cavities, subfloor, and the areas behind finished surfaces. The result is a scope: what is affected, what has to come out, and what is driving the moisture.
Most people reach this page after noticing something rather than after something broke: a smell that returns, a stain that spreads, a room that feels damp. An inspection answers what is actually there and where the moisture comes from, which is the information every later decision depends on. Several states, Texas among them, keep assessment and remediation as separate licensed roles specifically so the party identifying the problem is not the party selling the fix. Nothing here is medical advice — if you have health questions, those are for a clinician.
Every pro in our network is licensed and insured in California.
Frequently asked questions
Fontana is ten miles east. Why isn't the Fontana Fan the story?
Fontana sits on Lytle and San Sevaine, plus Kaiser slag. This city sits on Cucamonga and San Antonio Creek fans. February's totals can look similar; the canyon mouths are different. A stain here traces to Cucamonga underflow, not to Kaiser fill.
A short wet season on the fan. How does a 1980 slab still wick in February?
Because February is a quarter of the year, and the covering has been baking since April. Gaps that were tight in November take the first flash on the fan. A dry climate does not stay sealed; it opens and then soaks all at once.
Cucamonga is boxed in concrete. How is there still water under the pad?
The box took the surface. It did not take the cobble. Cucamonga alluvium still carries underflow beside the lining, and a 1980 pad on that gravel wets from below with no overtopping. Looking at the channel walls will miss the job under the floor.