Bandett (purewaterfiltering.com/undersink) says:

Counter-Top Water Filtration

really? Its water. from the air. How much fossil fuel did it take to produce the electricity to run the dehumidifier to take water from the air? and what is the carbon foot print of the dehumidifier. ? and do you really need to squander resources for this purpose? water a plant it prob wont taste good, but it wont harm you. jeeze

Josh3 (purewaterfiltering.com/ultrapure) says:

Under the Sink Filtration

Pour it on your flowers, they will love you for it.

PIERRE (purewaterfiltering.com/undersink) says:

Water Coolers

Due to the possiblility of dust or other contamination from the air, it is not safe to drink.

It is, however, perfectly good for watering the lawn, garden, houseplants, and so on.

It actually does no harm to pour it down the drain, as it is beneficial to flushing out the drains. And while not pure enough to drink, it is semi pure. So it will be used to dilute polluted water at the waste water treatment plant.

Dan S (purewaterfiltering.com/coolers) says:

Under the Sink Filtration

The water from a dehumidifier is as clean as the container it is captured in and should be pure water, cleaner than anything you can get out of your water tap.

The problem is that you are using a lot of power to do it and that is not economical from a money standpoint or from a green standpoint, because the water you are generating is costing the planet the carbon fuel that you are burning to make the electricity to make the machine work. Electricity is made on as demanded basis and if you don’t put a lot of load on the grid then you won’t require a lot of fossil fuel to be burnt. Sure someone will be using the power anyway, but if you take the unit off line then you are reducing the load and the required fuel to be burnt.

Before T. Boone Pickings got into green power sources he said that water was going to be the next oil. Most of the underground water that we have been using for years has been pumped out of the ground so a future source for clean water is necessary. It is needed to grow our crops, for our people to drink and for our people to wash with. But you need to add that water to the supply, not to the waste which is where most of the humidifier water is poured and wasted. Flushing it down the toilet forces the pumps to be used to run it through the filtering and cleaning system and those are electrically powered so they require the burning of more green house gas producing fuels.

To be truly green you would need to put your dehumidifier on a solar power or wind generator, which can be easily done. Then you need to make sure the water collected remains clean and is put into the SUPPLY not the WASTE. So the location of your humidifier has to be near the source or put some place like near the ocean where it won’t take the water that would normally rain out of the air. You need to pull out polluted water; either with waste or salts. When you evaporate most water the pollution and waste remains behind. What waste gases and products that would be mixed in can be burned out or other wise filtered or refined out.

However, geologically you are probably in the wrong place to use your dehumidifier so that it wouldn’t deprive the city and the suburbs of needed rain water. The best thing you can do for the planet then would be to have it recycled and get rid of it. Even if you use alternate power sources to run it the water you are pulling out of the air is water that is needed to water our grass, our crops and fill our reservoirs. This is one of the frustrating things about being eco-friendly you need to make sure that you aren’t adding to the problem by meaning to do well.

As for the gases inside of it; CFCs haven’t been used for a long time and are outlawed. If you have a recent dehumidifier then it has some sort of nasty chemicals in it, but not as dangerous as CFCs. The plastics in it are also a big problem since they will almost never decay away. Plastic is easy to recycle IF you can keep the plastics sorted so the dyes won’t containment the product. One green soda bottle in a batch of clean can ruin the entire batch unless you are making black plastic. Most of the US Steel industry is based on recycling steel; we lost most of our steel manufacturing to Asia and import our new steel. Prices are so cheap that it is no longer economical to ship in the steel containers and ship them back, so those steel containers are piling up waiting to be recycled.

According to Wikipedia:
Water collected from any dehumidifier is technically distilled water in that it does contain few of the minerals and other particulates that are removed in a true distillation process. However, a true distillation process condenses the steam of boiled water, and the boiling process kills any microbes and fungi that may be present in the pre-distilled water. Dehumidifiers are also not kept to a state of cleanliness required for food-grade standards (drinking water usually has very high legal requirements). The collected water is therefore not considered safe to drink.[2] Also, as the water may sit for a while in the collection bucket, the water may be quite stale, in particular with fungus collected from aerial spores.

Dehumidifier water is NOT up to drinking water standards.

Brian A (purewaterfiltering.com/countertopfilters) says:

Faucet Filtration Attachements

Use it to water your plants or flush your toilet, that way it is replacing water that you would have used anyway.

I would not suggest drinking it. The water likely contains all manner of dust, bacteria, etc, from the air that passed over the wet cooling coils.