I have lived in my 25 year old house for 6 months. The first 5 months my pit was totally dry, even the dehumidifier discharge would disappear in a day. For the past month the water level has risen slowly 1/4 inch a day maybe. I have checked the plumbing no leaky pipes. No rain now for a week and still the steady rise? Is there a way I can tell where the water is coming from? or any advice would be great..