Greenwood Village Water Hardness & Quality Report (2026)
Water Hardness
4.9 grains per gallon
Source
reservoir
pH Level
7.5
neutral = 7.0
Lead
0.003 mg/L
✓ Below action level
TDS
155.8 mg/L
Est. Daily Cost
$0.23
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 Greenwood Village, your appliances are currently losing 11% efficiency due to mineral buildup.
| Appliance | In Greenwood Village | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 6.8 yrs | 8.5 yrs | -20% |
| Washing Machine | 10.5 yrs | 12 yrs | -13% |
| Water Heater | 12.2 yrs | 15 yrs | -19% |
Regional Water Comparison
How Greenwood Village compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Greenwood Village, Colorado | 84.5 mg/L | 3.1 ppt | 🟡 Moderately Hard | reservoir |
| Southglenn, Colorado | 100.5 mg/L | 3.6 ppt | 🟡 Moderately Hard | reservoir |
| Englewood, Colorado | 81 mg/L | 3 ppt | 🟡 Moderately Hard | reservoir |
| Castlewood, Colorado | 93 mg/L | 3.4 ppt | 🟡 Moderately Hard | reservoir |
| Littleton, Colorado | 83 mg/L | 3.1 ppt | 🟡 Moderately Hard | reservoir |
National Benchmark
How Greenwood Village compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Greenwood Village | 84.5 mg/L | 🟡 Low |
| USA National Avg | 150 mg/L | 🟠 Moderate |
| Badger Top Rated | 8.5 mg/L | 🟢 None |
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What Makes Greenwood Village's Water Unique?
Local geology and source profile
Greenwood Village, Colorado, in Arapahoe County — an affluent Arapahoe County city adjacent to Centennial and Englewood in the south Denver suburb — receives its municipal water from Denver Water, drawing from the South Platte River and Denver's mountain reservoir system (Dillon, Cheesman, Eleven Mile reservoirs) through the Denver Water treatment and distribution system.
The moderately soft 84.5 mg/L hardness and TDS of 155.8 mg/L reflect the Denver Water mountain reservoir supply's moderate calcareous character — consistent with other Denver Water communities (Cherry Hills: ~82 mg/L; Centennial: ~86 mg/L). Denver Water draws primarily from the Rocky Mountains — Precambrian Pikes Peak Granite (insoluble), Precambrian Idaho Springs Gneiss (insoluble), and Precambrian Berthoud Gneiss (insoluble). The trace hardness comes from minor Pennsylvanian calcareous input in the Denver Basin. The predominantly insoluble Precambrian Rocky Mountain watershed produces the moderately soft Denver metro supply.
At 84.5 mg/L, Greenwood Village's water is moderately soft — light scale forms slowly in appliances, dishwashers remain efficient, and bathroom fixtures need occasional cleaning. Semi-annual descaling is appropriate. The PFAS level of 3.1 ppt is low — the Arapahoe County south Denver suburban corridor has limited major AFFF industrial sources, and the Denver mountain reservoir system carries minimal PFAS.
Geology & Source: Greenwood Village in Arapahoe County draws from Denver Water on the South Platte River and Denver Mountain Reservoirs (Arapahoe County, central Colorado) — the South Platte drains the Rocky Mountains (Precambrian Pikes Peak Granite, Precambrian Idaho Springs Gneiss — mostly insoluble) — Colorado Arapahoe County South Platte River Rocky Mountain crystalline watershed produces moderately soft water at 84.5 mg/L with TDS 155.8 mg/L.