Reverse osmosis cost in Phoenix

Published price ranges

• This Old House: point-of-use RO systems run $150–$1,300. Installation typically costs $300–$700, with point-of-use installs usually $150–$300. Whole-house systems run about $1,000–$4,800 (This Old House).
• Plumbing Picks: a typical under-sink install lands around $200–$1,000 all-in, with most jobs near $300–$600 (Plumbing Picks).

Phoenix pricing

Missing data: we haven't found published Phoenix-specific RO pricing. The ranges above are national, so compare local written quotes.

Phoenix water

Phoenix's 2025 Water Quality Report gives total hardness of 172 to 302 ppm, or 10 to 17.6 grains per gallon. (Source: City of Phoenix 2025 Water Quality Report) Many homes in hard-water areas pair a softener with RO at the kitchen sink (softener vs. RO).

More: RO installation cost · water softener cost in Phoenix · hard water in Phoenix