Casa Grande's tap water contains chlorine, dissolved solids, and contaminants that affect taste and quality. Our Thirst RO systems remove 99%+ of impurities, delivering water that's purer than bottled — right from your kitchen faucet.
12-18 GPG
Water Hardness (vs. 6 GPG national avg)
Arizona Water Company groundwater wells (Pinal Valley system)
Primary Water Source
Nearest: Mesa
CWC Showroom & Service Center
Casa Grande tap water meets minimum EPA standards, but still contains Hardness, arsenic, fluoride, nitrate, TDS. These affect the taste, smell, and purity of your drinking water. A reverse osmosis system removes virtually all contaminants, giving you clean, great-tasting water.
Browse our reverse osmosis systems→1,600+
Five-Star Reviews
Since 1998
Serving Arizona Families
0% APR
Financing for 9 Months
Casa Grande tap water comes from Arizona Water Company groundwater wells (Pinal Valley system) and carries hardness, arsenic, fluoride, nitrate, TDS. A reverse osmosis system under the kitchen sink handles the water you actually drink and cook with — sized and installed for Casa Grande homes.
reverse osmosis
Advanced water purifier delivering bottled water quality without the environmental impact. 5-stage purification removes 99%+ of dissolved solids.
or $89/mo for 9 months · 0% APR
reverse osmosis
Innovative reverse osmosis with advanced purification and alkaline remineralization. Leaves important trace minerals and electrolytes in filtered water for better taste.
or $100/mo for 9 months · 0% APR
reverse osmosis
Delivers mineral-rich alkaline water with eco-efficient purification. Balanced pH for healthier hydration — the premium option for health-conscious households.
or $111/mo for 9 months · 0% APR
The utility's report does not publish hardness; range is typical of Pinal County groundwater and confirmed by in-home testing. Fluoride up to 2.47 ppm and nitrate up to 9.37 ppm were reported for the Pinal Valley system in 2025.
View the Arizona Water Company (Pinal Valley) report(opens in a new tab)6056 E Baseline Rd ste 135
Mesa, AZ 85206
Mon–Fri: 8am–4pm
Sat-Sun: 8am–1pm (Sales Only)
Casa Grande water hardness averages 12-18 GPG, sourced from arizona water company groundwater wells (pinal valley system). This is significantly harder than the national average of 6 GPG, meaning scale buildup, dry skin, and appliance damage are common without treatment.
Yes — Casa Grande is within our Phoenix metro service area. Our nearest location is in Mesa. We offer free in-home water testing and same-week installation in most cases.
Reverse osmosis systems for Casa Grande homes start at $795: Thirst RO Pure from $795, Thirst RO Restore from $895, Thirst RO Thrive from $995. Every system is backed by a 5-Year Part & Labor Warranty. Installation is quoted separately. Pair with a water softener and save $350 with our bundle deal. 0% APR financing for 9 months is available.
Yes, for drinking water. A softener removes hardness so your pipes and appliances last, but it does not remove dissolved solids, chlorine, or other contaminants. Reverse osmosis handles the water you drink and cook with — most Casa Grande homes pair both, and the bundle saves $350.
Casa Grande tap water contains Hardness, arsenic, fluoride, nitrate, TDS. A Thirst RO system removes 90%+ of dissolved solids and contaminants, and the RO+ model adds alkaline remineralization for better-tasting water.
Under the kitchen sink, with its own dedicated faucet at the counter. Installation is quoted separately for every RO system we sell in Casa Grande.
Arizona's high dissolved-solids water works filters harder than the national average. Pre-filters are typically replaced yearly and the membrane every few years — we set a schedule based on your Casa Grande water and household usage.
Yes — 0% APR financing for 9 months applies to reverse osmosis systems installed in Casa Grande, and pairing RO with a water softener saves $350.
At 12-18 GPG, Casa Grande's water is well above the national average. A water softener protects your pipes, appliances, and skin. Pair with RO and save $350 with our bundle deal.
Casa Grande Water Softener Systems→A water expert will test your water, recommend the right system, and give you a no-pressure quote — all for free.
