Denver Water Quality Data
An independent analysis of water chemistry in the Denver Metro area, based on annual utility reports and USGS data.
Source: Aggregated 2023 Water Quality Reports from local utilities. Values represent annual averages.
Denver's water hardness fluctuates throughout the year depending on the primary water source (snowmelt vs. reservoir reserves).
How does Denver's water compare to the national average across key quality metrics? Denver is harder than average but meets all EPA standards.
Note: TDS, pH, and chlorine values are scaled for chart readability. Source: USGS & EPA Water Quality Data.
Calcium and magnesium are the primary minerals that cause "hard water." While healthy to drink, they cause scale buildup in plumbing.
Key Water Quality Metrics
| Parameter | Average Level | EPA Goal |
|---|---|---|
| pH Level | 7.8 - 8.2 | 6.5 - 8.5 |
| TDS (Total Dissolved Solids) | 280 - 340 ppm | < 500 ppm |
| Turbidity | < 0.3 NTU | < 1.0 NTU |
| Chlorine Residual | 0.5 - 1.5 mg/L | Max 4.0 mg/L |
| Fluoride | 0.7 mg/L | 0.7 mg/L (target) |
What does this data mean for you?
Denver's water meets or exceeds all EPA safety standards, meaning it is perfectly safe to drink. However, with an average hardness of 7.8 GPG and TDS over 280 ppm, many homeowners experience aesthetic and maintenance issues:
- Scale Buildup: The high calcium content (68 mg/L) causes white crusty deposits on fixtures and reduces appliance lifespan.
- Taste/Odor: Chlorine is used for disinfection. While safe, it can impart a chemical taste and odor to drinking water.
- Dry Skin: Hard water leaves soap residue on skin and hair.
Recommendation: A standard ion-exchange water softener paired with a carbon filter (for chlorine) is the optimal treatment setup for typical Denver municipal water.