| Reverse Osmosis | Bottled Water | Exchange Tank | Water Softeners | One Water System |
| Cost Per Gallon
$0.18 – $0.25 | Cost Per Gallon
$0.79 – $5.00 | Cost Per Gallon
$.006 – $.010 | Cost Per Gallon
$0.13 – $0.25 | Cost Per Gallon
$0.0020 |
| Expensive | Expensive | Expensive | Expensive | Inexpensive |
| Yearly filter/membrane adjustment or replacement. | Quality may be no better than tap water. | Not generally used for drinking. | Not generally used for drinking. | Provides great tasting, clean, odor-free water from every faucet. |
| Aggressive,low ph water. | Plastic bottles should not be re-used. | Leaves a slick feeling on skin after shower and bath. | Leaves a slick feeling on skin after shower and bath. | Excellent for drinking, washing, clothes, etc. |
| Limited amount of water avaliable. | Bottle may leach PCB’s into the water. | May require bi-weekly replacement and/or multiple tanks. | Requires replacement of salt(sodium or potassium chloride) | Effective service life varies from 10+ years. |
| Wastes significant amounts of water. Not good for plants or pets. | Plastic bottles create environmental issues. | For drinking water, requires use of reverse osmosis or bottled water. | For drinking water, requires use of reverse osmosis or bottled water. | NO regular Maintenance or filter changes. |
| | Deliveries may require driver access to garages. | Not good for plants or pets. | Does NOT use salt, potassium,chemicals or magnets. |
| | Not good for plants or pets. | Banned in many communities due to salt brine backwash. | Installations NOT restricted by any legislation |
