Hard water in Shaw Heights, CO
Reported by Westminster City of · June 2025
- CO typical
- 97 mg/L
- EPA health violations since 2016
- 0
- Softener for 3 people
- 24k grain
- Data
- Utility report
Shaw Heights water measures 127 mg/L (7.4 gpg) of hardness, hard by USGS standards. The number comes from Westminster City of, dated June 2025.
Shaw Heights sits 30 mg/L above the typical Colorado figure of 97. None of the 10 nearest cities we track has harder water. The range nearby runs from 46 mg/L in Broomfield to 119 in Federal Heights.
What 127 mg/L means at home
Expect white crust on faucets and showerheads, plus spots on dishes that come out of the dishwasher.
Kettles collect scale quickly. Water heaters build up sediment at the bottom of the tank, which makes them work harder over time.
Soap and detergent need a little more to lather, and soap scum shows up in the tub.
Hardness is not a health problem, and EPA sets no limit for it. It is a matter of scale and soap.
What to do about it
At 127 mg/L most of the trouble is scale, and only a few things deal with it.
Ion-exchange water softener
The standard whole-house fix. It swaps calcium and magnesium for sodium or potassium and needs salt plus a drain. Size it with the calculator below.
Salt-free conditioner
No salt and no drain line. It changes how minerals form scale instead of removing them, so water still tests hard.
Reverse osmosis or carbon filter
Under-sink reverse osmosis removes minerals from drinking water only. Plain carbon filters improve taste but do not soften.
3 people × 75 gallons a day × 7.4 gpg = 1,672 grains a day. A 24,000-grain unit regenerates about every 14 days.
EPA record for Shaw Heights's water system
No health-based violations since 2016
Serves about 202,078 people from surface water.
- Health-based
- 0
- Monitoring or reporting
- 3
- Open now
- 0
TapWaterData ties Shaw Heights to this system. EPA's service-area records do not name Shaw Heights, so check the utility printed on your water bill.
Health-based means a contaminant above its legal limit or a missed treatment step. Monitoring and reporting violations are late or missing tests and notices. Source: EPA ECHO, 2026Q3 export, violations with periods starting 2016 or later. Full EPA record.
Questions
Is Shaw Heights water hard?
Yes. It measures about 127 mg/L (7.4 grains per gallon), which the USGS classes as hard.
What is the water hardness in Shaw Heights in grains per gallon?
About 7.4 gpg. One grain per gallon equals 17.1 mg/L, so 127 mg/L divided by 17.1 gives 7.4.
What size water softener do I need in Shaw Heights?
For 3 people using 75 gallons each per day, 7.4 gpg works out to about 1,672 grains a day. A 24,000-grain softener covers that with a regeneration about every 14 days.
Has the Shaw Heights water system had EPA violations?
EPA records show no health-based violations for Westminster City of since 2016. There were also 3 monitoring or reporting violations, which are about late or missing tests and notices.
Nearby cities
- Federal Heights119 mg/LModerately hard
- Westminster100 mg/LModerately hard
- Sherrelwood100 mg/LModerately hard
- Twin Lakes99 mg/LModerately hard
- Berkley96 mg/LModerately hard
- Welby96 mg/LModerately hard
- Northglenn118 mg/LModerately hard
- Arvada93 mg/LModerately hard
- Derby79 mg/LModerately hard
- Broomfield46 mg/LSoft
Hardness data: TapWaterData US Water Hardness (utility report, June 11, 2025), CC BY 4.0. Population: US Census Bureau. Violations: EPA ECHO. How we use them.