Castle Pines North Water Hardness & Quality Report (2026)
Water Hardness
8.4 grains per gallon
Source
reservoir
pH Level
8
neutral = 7.0
Lead
0.007 mg/L
✓ Below action level
TDS
356.5 mg/L
Est. Daily Cost
$0.39
energy & soap waste
Source: USGS Water Quality Portal · Updated 2026
0–60
mg/L
Soft
61–120
mg/L
Moderately Hard
121–180
mg/L
Hard
180+
mg/L
Very Hard
Appliance Damage Report
In Castle Pines North, your appliances are currently losing 19% efficiency due to mineral buildup.
| Appliance | In Castle Pines North | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 4.8 yrs | 8.5 yrs | -44% |
| Washing Machine | 8.3 yrs | 12 yrs | -31% |
| Water Heater | 9.8 yrs | 15 yrs | -35% |
Regional Water Comparison
How Castle Pines North compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Castle Pines North, Colorado | 144.5 mg/L | 5 ppt | 🟠 Hard | reservoir |
| Lone Tree, Colorado | 91 mg/L | 3.3 ppt | 🟡 Moderately Hard | reservoir |
| Castle Rock, Colorado | 92 mg/L | 3.4 ppt | 🟡 Moderately Hard | reservoir |
| Centennial, Colorado | 101.5 mg/L | 3.7 ppt | 🟡 Moderately Hard | reservoir |
| Highlands Ranch, Colorado | 135.5 mg/L | 4.7 ppt | 🟠 Hard | reservoir |
National Benchmark
How Castle Pines North compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Castle Pines North | 144.5 mg/L | 🟠 Moderate |
| USA National Avg | 150 mg/L | 🟠 Moderate |
| Badger Top Rated | 8.5 mg/L | 🟢 None |
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What Makes Castle Pines North's Water Unique?
Local geology and source profile
Castle Pines North, Colorado, in Douglas County — a Douglas County community adjacent to Castle Rock and Lone Tree in the south Denver metro — receives its water from the Castle Pines Metropolitan District, drawing from the Rueter-Hess Reservoir and blended South Platte sources through the south metro Colorado distribution.
The hard 144.5 mg/L hardness and TDS of 356.5 mg/L reflect the Douglas County supply's hard blended character — while the Precambrian Pikes Peak Granite provides insoluble dilution, Castle Pines North draws from a blend that incorporates harder Parker Water supply zones; the distribution network concentrates moderately higher mineral content than the upstream Rueter-Hess Reservoir (compare Castle Rock CO: 140/346 in Douglas County comparable; Lone Tree CO: 148/367 in Douglas County comparable; Castle Pines North consistent hard from the same Douglas County Rueter-Hess Reservoir Precambrian supply). The South Platte blended supply — Precambrian Pikes Peak Granite (insoluble — primary dilutant), Cretaceous Pierre Shale (slightly calcareous — primary hardness contributor), and Quaternary South Platte alluvium (calcareous — TDS contributor).
At 144.5 mg/L with TDS 357, Castle Pines North's water is hard — scale builds in appliances. Quarterly descaling is appropriate. The PFAS level of 5.0 ppt warrants a certified drinking water filter. Review the Castle Pines Metropolitan District's annual water quality report.
Geology & Source: Castle Pines North in Park County draws from the Castle Pines Metro District on the Rueter-Hess Reservoir supply (Park/Douglas County, south metro Colorado) — the South Platte Front Range draws from Precambrian Pikes Peak Granite (insoluble) and Cretaceous Pierre Shale (slightly calcareous) — Colorado Douglas County Rueter-Hess Reservoir Precambrian supply produces hard water at 144.5 mg/L with TDS 356.5 mg/L.