Basement water seepage can be an ongoing issue that sometimes becomes just a fact of spring. Water from saturated ground can find its way through just about any crack or seam in a basement floor and foundation. Sometimes it can even soak directly through solid concrete. If rising ground water becomes trapped, it can build
"Hydrostatic" pressure, resulting in cracking and heaving.
There are some quick fixes offered from various sources. IE; concrete sealants, channels you can glue on the floor, installing sump holes wherever puddles accumulate. None of which are practical or stand up over time. The most reliable, widely accepted and permanent solution is an Interior Drain Tile System. It's the only method that can be guaranteed.
In-Home Radon Exposure can be a serious concern. According to the EPA, it's the number one cause of lung cancer among non-smokers. Radon originates from deep underground uranium deposits. As it's released from the soil beneath our homes, it becomes trapped and accumulates. When inhaled it releases Alpha, Beta and Gamma radiation directly into your lungs. It's similar to receiving chest
x-rays. There is no safe level of radon. Whatever your radon level is, you want it to be lower.
In most cases a radon mitigation system can be installed quickly and at a reasonable cost ($1300-$1500). Not only will a good mitigation system reduce radon levels, but it can reduce water vapor intrusion possibly eliminating the need for dehumidifiers. It may lower other soil gasses as well, such as: methane, hydrocarbons and other contaminants. According the the EPA, the most effective Radon Mitigation method is Sub-Slab Depressurization.