Lafayette Water Hardness & Quality Report (2026)
Water Hardness
8.3 grains per gallon
Source
reservoir
pH Level
8
neutral = 7.0
Lead
0.007 mg/L
✓ Below action level
TDS
346.5 mg/L
Est. Daily Cost
$0.38
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 Lafayette, your appliances are currently losing 19% efficiency due to mineral buildup.
| Appliance | In Lafayette | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 4.9 yrs | 8.5 yrs | -42% |
| Washing Machine | 8.3 yrs | 12 yrs | -31% |
| Water Heater | 9.9 yrs | 15 yrs | -34% |
Regional Water Comparison
How Lafayette compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Lafayette, Colorado | 142 mg/L | 4.9 ppt | 🟠 Hard | reservoir |
| Louisville, Colorado | 104.5 mg/L | 3.8 ppt | 🟡 Moderately Hard | reservoir |
| Erie, Colorado | 116.5 mg/L | 4.1 ppt | 🟡 Moderately Hard | reservoir |
| Broomfield, Colorado | 149 mg/L | 5.2 ppt | 🟠 Hard | reservoir |
| Superior, Colorado | 149 mg/L | 5.2 ppt | 🟠 Hard | reservoir |
National Benchmark
How Lafayette compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Lafayette | 142 mg/L | 🟠 Moderate |
| USA National Avg | 150 mg/L | 🟠 Moderate |
| Badger Top Rated | 8.5 mg/L | 🟢 None |
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What Makes Lafayette's Water Unique?
Local geology and source profile
Lafayette, Colorado, in Boulder County — a major north Front Range suburban community (Lafayette is a significant Boulder County city — a north Front Range suburb adjacent to Louisville and Superior in the Boulder County–Broomfield County metropolitan corridor; Lafayette has transformed from a coal mining town (the Lafayette area had significant coal mining operations in the late 19th and early 20th centuries — the East Boulder County coal fields were an important source of coal for the Denver Front Range) into one of the most desirable north Boulder County suburban communities, known for its strong public school system (Boulder Valley School District), its relatively affordable housing compared to Boulder itself, and its growing South Boulder Road commercial corridor), a diverse Boulder County community with a primarily professional, university-affiliated, and diverse suburban family population (Lafayette has a significant Hispanic-American community legacy — the original Lafayette coal mining community included a significant Mexican-American population that has remained), adjacent to Boulder and Louisville in the north Front Range Boulder County corridor — draws its municipal water supply via the City of Lafayette Water Division. Water hardness in Lafayette measures 142 mg/L — classified as moderately hard.
Lafayette's moderate hardness reflects the north Front Range Boulder County watershed's calcareous-moderate character. The Boulder Creek watershed at Lafayette–Boulder County draws from the Precambrian Boulder Creek gneiss with effective treatment, producing the moderate 142 mg/L.
At 142 mg/L, Lafayette residents encounter moderate scale accumulation. Monthly cleaning is recommended. City of Lafayette Water Division consistently delivers water meeting all Colorado CDPHE and EPA Safe Drinking Water Act requirements.
Geology & Source: Reservoir supply from the Boulder Creek watershed via the City of Lafayette Water Division — the Boulder County north Front Range Lafayette corridor (Precambrian calcareous-poor Boulder Creek gneiss — the calcareous-moderate north Front Range Boulder County watershed; effective treatment); moderately hard supply at 142 mg/L in Boulder County.