Arvada Water Hardness & Quality Report (2026)
Water Hardness
8 grains per gallon
Source
reservoir
pH Level
8
neutral = 7.0
Lead
0.008 mg/L
✓ Below action level
TDS
329.7 mg/L
Est. Daily Cost
$0.37
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 Arvada, your appliances are currently losing 18% efficiency due to mineral buildup.
| Appliance | In Arvada | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 5.1 yrs | 8.5 yrs | -40% |
| Washing Machine | 8.5 yrs | 12 yrs | -29% |
| Water Heater | 10.1 yrs | 15 yrs | -33% |
Regional Water Comparison
How Arvada compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Arvada, Colorado | 137.5 mg/L | 4.8 ppt | 🟠 Hard | reservoir |
| Wheat Ridge, Colorado | 57.5 mg/L | 2.3 ppt | 🟢 Soft | reservoir |
| Westminster, Colorado | 55.5 mg/L | 2.2 ppt | 🟢 Soft | reservoir |
| Sherrelwood, Colorado | 163 mg/L | 5.6 ppt | 🟠 Hard | reservoir |
| Lakewood, Colorado | 149.5 mg/L | 5.2 ppt | 🟠 Hard | reservoir |
National Benchmark
How Arvada compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Arvada | 137.5 mg/L | 🟠 Moderate |
| USA National Avg | 150 mg/L | 🟠 Moderate |
| Badger Top Rated | 8.5 mg/L | 🟢 None |
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What Makes Arvada's Water Unique?
Local geology and source profile
Arvada, Colorado, a major suburban city in Jefferson County northwest of Denver, receives its municipal water supply through the Consolidated Mutual Water Company (CMWC) and the Denver Water regional distribution network, sourcing from the South Platte River headwaters system and Colorado–Big Thompson Project western slope water stored in Carter Lake and Horsetooth Reservoir (Larimer County), delivered via Northern Water's distribution infrastructure. Arvada lies at the Denver metropolitan area's western edge, closer to the Front Range Foothills than other Denver suburbs. Water hardness measures 137.5 mg/L — classified as moderately hard, slightly higher than other Front Range suburbs.
Arvada's somewhat higher Front Range hardness reflects its proximity to the Denver Foothills and the greater proportion of locally influenced groundwater in Consolidated Mutual's supply blend. The Denver Water South Platte headwater component drains the Front Range Precambrian granite and metamorphic batholith — inherently soft. However, Consolidated Mutual also draws from local Foothills groundwater and reservoir sources that cross the Cretaceous Morrison Formation, Dakota Sandstone, and Pierre Shale terrain of the Denver Foothills — formations with minor calcareous content. Additionally, Jefferson County's groundwater draws show higher mineral loads from the Denver Basin aquifer (Arapahoe, Denver, Laramie-Fox Hills formations) which underlies the Foothills region and contributes moderate dissolved calcium.
At 137.5 mg/L, Arvada residents encounter moderate scale accumulation in household use. Faucet aerators and showerheads develop deposits after several months — monthly cleaning with citric acid solution is standard maintenance. Dishwashers produce better glassware results with rinse-aid, and water heaters benefit from annual inspection for element scale accumulation. Consolidated Mutual Water Company and Denver Water consistently deliver water meeting all Colorado CDPHE and EPA Safe Drinking Water Act requirements.
Geology & Source: Mixed supply from South Platte River headwaters via Denver Water regional distribution and Colorado–Big Thompson project water via Consolidated Mutual Water Company — the Front Range Precambrian Idaho Springs and Pikes Peak granite snowmelt dominates; some limited exposure to Foothills Cretaceous Morrison and Dakota calcareous formations contributes to moderately hard 137.5 mg/L in Jefferson County.