What is a key sign of a chemical spill?

A key sign of a chemical spill can encompass a variety of indicators that suggest the presence of hazardous materials in the environment. Pungent odors are often one of the most noticeable signs, as many chemicals emit distinctive smells that can alert individuals to their presence. Color changes in water can indicate contamination, with certain chemicals altering the water's appearance, revealing a potential spill. Additionally, the presence of dust particles in the air can be a sign of a spill, especially if chemicals have been aerosolized or if solid particulates are released.

The inclusion of all these signs in one answer reflects the fact that spills can manifest in multiple ways, highlighting the necessity for awareness and vigilance in identifying potential hazards. Recognizing the combination of these indicators is crucial for ensuring safety and prompting appropriate response measures in the case of a hazardous materials incident.