High Relative Humidity
This relative humidity is overly high compared to some we encounter but anything over 50% provides an atmosphere where mold can grow.
Iron Ochre
This is iron ochre. It is a bacteria that forms from iron and water. Although not harmful it is certainly unsightly.
Mold Growth
Mold is beginning to form due to high humidity and water in this crawlspace
Sump Pump
Not all sump pumps are created equal.