I have noticed that it is humid in my basement. I ventilate regularly but it is still damp.

I bought a [dehumidifier](https://www.toppreise.ch/preisvergleich/Klimageraete/STADLER-FORM-Albert-Little-p288714) and put it into operation. After less than 24 hours, the 2 liter tank was already 2 times full.

Is this normal or do I have a serious moisture problem in the basement? Is my solution correct? Anything else I can do?

The outside Humidity is according to IBM weather.com around 74- 79%.