Crawl Space Wet Spot
Standing Water in a crawl space is never desirable. It causes so many problems:

Water attracts pests

Mold and fungus can grow fast.

Mold produces allergens and affect your respiratory system.

Hantavirus from pests. (HCF)

Microbial growth. This can lead to headaches, etc.


Actually I’ve done a few dozen projects on the Oregon coast and everything just doesn’t dry out and go away...even on the mid-coast area where it blows hard all the time. We’ll spend what it takes to get rid of standing water...drain it, pump it, do what you have to but don’t let it stand or you’ll have severe problems.
Here’s an article that helps explain:
https://www.nachi.org/crawlspace-hazards-inspection.htm
Google crawl space moisture and you’ll find many more articles too.
Note: These are just the health risks...not to mention construction problems.
To locate the problem, call an inspector. Water can be from a rising water table (seasonal) or from a roof drain directed towards the house.