Highlands Ranch Water tells homeowners straight out: the district's water typically runs 11–13 grains per gallon (188–222 mg/L) and it is not softened at the treatment plant, because hardness isn't a health issue. That's good news for your safety and hard news for your appliances, fixtures, and glass shower doors. A free in-home water test tells you exactly what your home is dealing with and matches you with a local specialist for softening, filtration, or reverse osmosis.
188–222 mg/L, per Highlands Ranch Water's published water quality data — sourced primarily from the South Platte River.
Highlands Ranch Water draws most of its supply from the South Platte River, occasionally supplementing with groundwater wells during drought or peak demand. Both sources carry naturally occurring calcium and magnesium — the minerals that make water "hard." The district is explicit that it does not remove hardness during treatment, because hardness has no health or safety implications and the water still meets every EPA and Colorado Department of Public Health & Environment standard.
Source: Highlands Ranch Water — Water Hardness and Water Quality FAQs.
Built around the district's own 11–13 grain range — adjust it if your free water test comes back different. This gives a starting estimate, not a quote.
Estimate only, based on the sizing method on our water softener page. A free in-home water test confirms the exact number for your house.
Get My Free Water TestSoftening, filtration, and drinking-water treatment solve different problems. Here's where to start.
Ion-exchange softening sized to Highlands Ranch's 11–13 grain water — the fix for scale, spotting, and appliance wear.
See softener options →Sediment and carbon filtration for chlorine taste and odor throughout the entire house.
See filtration options →Dedicated drinking-water filtration at the kitchen sink for the cleanest possible glass of water.
See RO options →A free, no-obligation in-home test that confirms your exact hardness, TDS, and chlorine levels.
See testing details →How hard water shortens the life of water heaters, dishwashers, and premium fixtures — and how to stop it.
See protection guide →A plain-English look at the district's published hardness data, source, and treatment approach.
Read the water quality page →Higher-end finishes make hard water damage more visible, not less. Matte black and brushed-gold fixtures show mineral spotting faster than polished chrome. Frameless glass shower enclosures etch permanently if scale is left to dry on the glass for months at a time. Tankless water heaters — increasingly common in newer Highlands Ranch construction — lose efficiency and can void their warranty when scale builds up on the heat exchanger.
None of this is a Highlands Ranch-specific defect; it's simple chemistry playing out at 11–13 grains per gallon, day after day, on the fixtures and appliances a nicer home tends to have more of. Our appliance & fixture protection guide breaks down what's actually at risk room by room, and our water softener page covers the equipment that solves it at the source.
See what's at risk in your home →A specialist tests your home's actual water and walks you through what's in it — hardness, TDS, chlorine.
A recommendation built around your household size and Highlands Ranch's 11–13 grain water, not a one-size pitch.
A licensed, insured local installer handles the work, usually within the same week.
Salt, filter, and membrane maintenance schedules so the system keeps performing for years.
From the four founding villages to the newer communities on the west side, we connect homeowners across Highlands Ranch and ZIP codes 80126, 80129, and 80130 with local water treatment specialists.
No obligation, no pressure — just a clear picture of what's actually in your water and what it would take to protect your home.
Get My Free Water Test