Broomfield Water Hardness & Quality Report (2026)
Water Hardness
8.7 grains per gallon
Source
reservoir
pH Level
8.1
neutral = 7.0
Lead
0.008 mg/L
✓ Below action level
TDS
375 mg/L
Est. Daily Cost
$0.40
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 Broomfield, your appliances are currently losing 20% efficiency due to mineral buildup.
| Appliance | In Broomfield | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 4.7 yrs | 8.5 yrs | -45% |
| Washing Machine | 8.1 yrs | 12 yrs | -33% |
| Water Heater | 9.6 yrs | 15 yrs | -36% |
Regional Water Comparison
How Broomfield compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Broomfield, Colorado | 149 mg/L | 5.2 ppt | 🟠 Hard | reservoir |
| Louisville, Colorado | 104.5 mg/L | 3.8 ppt | 🟡 Moderately Hard | reservoir |
| Lafayette, Colorado | 142 mg/L | 4.9 ppt | 🟠 Hard | reservoir |
| Superior, Colorado | 149 mg/L | 5.2 ppt | 🟠 Hard | reservoir |
| Westminster, Colorado | 55.5 mg/L | 2.2 ppt | 🟢 Soft | reservoir |
National Benchmark
How Broomfield compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Broomfield | 149 mg/L | 🟠 Moderate |
| USA National Avg | 150 mg/L | 🟠 Moderate |
| Badger Top Rated | 8.5 mg/L | 🟢 None |
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What Makes Broomfield's Water Unique?
Local geology and source profile
Broomfield, Colorado — Colorado's newest and smallest county (established 2001, the only Colorado city-county) at the junction of US 36 and I-25 between Denver and Boulder — draws its municipal water supply from multiple sources via the City and County of Broomfield Water Division, including Denver Water (South Platte River–Dillon Reservoir system via Roberts Tunnel), the Left Hand Water District (St. Vrain and Boulder Creek watersheds), and local Denver Basin groundwater wells. Water hardness in Broomfield measures 149 mg/L — classified as moderately hard.
Broomfield's moderate hardness reflects its mixed supply from the Colorado Front Range surface water and Denver Basin groundwater. The Denver Water South Platte–Dillon Reservoir supply (Rocky Mountain granite watershed — moderately soft at source) is blended with local Denver Basin Aquifer groundwater (the Arapahoe Aquifer — Cretaceous Laramie Formation calcareous sandstone — very hard, 200–400 mg/L). The Front Range Lyons Formation (Permian red sandstone with calcareous cement) and Pierre Shale (Cretaceous calcareous shale) drainage contribute moderate dissolved calcium to the Boulder Creek and Left Hand Creek supplies. The resulting blend at Broomfield is the moderate 149 mg/L, between the soft Rocky Mountain surface water and the hard Denver Basin groundwater.
At 149 mg/L, Broomfield residents encounter moderate scale accumulation. Faucet aerators and showerheads develop deposits after several months — monthly cleaning with citric acid solution is practical maintenance. City and County of Broomfield Water Division consistently delivers water meeting all Colorado CDPHE and EPA Safe Drinking Water Act requirements.
Geology & Source: Mixed supply from Denver Water (South Platte River and Dillon Reservoir via the Roberts Tunnel), Left Hand Water District, and the City of Broomfield Water Division local wells — the South Platte River Rocky Mountain drainage and the Front Range calcareous Denver Basin groundwater; moderately hard supply at 149 mg/L in Broomfield County.