Caldwell's water averages 280 PPM TDS and 17 grains per gallon, drawing from the Snake River aquifer with known hardness and agricultural runoff concerns. Aqua Source installs custom water treatment systems built for Caldwell's exact water profile.
Caldwell's municipal water supply draws from the Snake River aquifer in Canyon County. This water source carries higher dissolved mineral content than Ada County sources, and Caldwell's proximity to agricultural land introduces additional dissolved solids and occasional nitrates into the groundwater supply.
The result is water averaging 16–18 grains per gallon hardness, around 280 PPM TDS, and elevated mineral content that causes rapid scale buildup in pipes, water heaters, and appliances throughout the home.
Custom-built for Caldwell's specific water chemistry. At prices that beat the competition.
Superior softening for cleaner, softer water everywhere.
View Products →Combines superior water filtration and softening in one system.
View Products →Get instant access to hot water every time you turn on the faucet.
View Products →Advanced purification for the purest drinking water.
View Products →Top-of-the-line tankless heaters for endless hot water on demand.
View Products →We'll test your Caldwell water for free and tell you exactly what you need.
Book a Free Test →More than 25 years of plumbing and water treatment experience across the valley — we know the local plumbing, the soils, and the quirks of each city's water service, Caldwell included.
Headquartered right here in the Treasure Valley. The owner answers the phone. Same techs come back for service — never a subcontractor.
Industry-leading components manufactured domestically. No commission-based selling — direct pricing means we beat the big guys consistently.
From downtown Caldwell to Indian Creek Plaza area and all new developments on the city perimeter — Aqua Source covers every Caldwell neighborhood. Same-day water testing available throughout Canyon County.
Nearby service areas: Nampa · Middleton
What's in Treasure Valley tap water? See each city's 2025 water report figures in our guide to water treatment services in Boise.
“Great service! Brock was very knowledgeable and he helped explain what are options were. The software machine we got is very quiet and our water is silky smooth! It was also a very reasonably priced unit! Highly recommended!”
“I recently had the pleasure of working with Aqua Source and I could not be happier. Brock was extremely knowledgeable and professional. He took the time needed to answer all of my questions. I highly recommend this company for anyone looking to invest in a…”
“Aqua Source Boise did an excellent job installing my new water softener. The technicians were professional, courteous, and efficient. They completed the installation quickly and with minimal disruption. My new softener is working great, and I am already noticing improved water quality. I am very…”
Caldwell draws from the Snake River aquifer in Canyon County — a water source with naturally high mineral content from the surrounding basalt formations and agricultural land. This produces 16–18 gpg hardness and around 280 PPM TDS consistently.
Yes. At 17 gpg, Caldwell's water causes significant scale buildup and premature appliance failure. A properly installed softener extends appliance lifespan, reduces soap usage, and improves water feel throughout the home.
We serve all of Caldwell (83605, 83606) including downtown, North Caldwell, South Caldwell, East Caldwell, Indian Creek area, Rimrock, Centennial, and all surrounding Canyon County communities.
A complete water softener installation in Caldwell ranges from $1,800 to $3,500 all-in. Aqua Source uses flat transparent pricing — installation, materials, and warranty all included. Currently offering $200 off any softener system.
