Table of Contents
· CWT Editorial Team · 32 min read · Water Quality
1. [Understanding Water Hardness: What the Numbers Mean](#understanding-water-hardness)
2. [Why DFW Water Is So Hard: The Limestone Story](#why-dfw-water-is-hard)
3. [Suburb-by-Suburb Hardness Breakdown](#suburb-by-suburb-breakdown)
4. [Dallas Water Quality: What the City Gets Right](#dallas-water-quality)
5. [Fort Worth Water: The Overlooked Half of the Metroplex](#fort-worth-water)
6. [The True Cost of Hard Water for DFW Homeowners](#cost-of-hard-water)
7. [Top DFW Water Treatment Companies Compared](#top-companies-compared)
8. [Choosing the Right System for Your DFW Home](#choosing-the-right-system)
9. [Scam Watch: What DFW Homeowners Need to Avoid](#scam-watch)
10. [FAQ: 10 Questions DFW Homeowners Ask Most](#faq)
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Understanding Water Hardness: What the Numbers Mean {#understanding-water-hardness}
Before diving into local data, it is important to understand what "water hardness" actually measures and why it matters. Water hardness refers to the concentration of dissolved calcium and magnesium minerals in your tap water. These minerals are not harmful to drink. The Environmental Protection Agency (EPA) does not regulate hardness as a health concern. But their effects on your home's plumbing, appliances, skin, hair, and wallet are substantial and well-documented.
Water hardness is measured in two common units:
The conversion is straightforward: 1 GPG equals approximately 17.1 PPM. The Water Quality Association classifies hardness on this scale:
| Classification | GPG | PPM (mg/L) |
|---------------|-----|------------|
| Soft | 0-1 | 0-17 |
| Slightly Hard | 1-3.5 | 17-60 |
| Moderately Hard | 3.5-7 | 60-120 |
| Hard | 7-10.5 | 120-180 |
| Very Hard | 10.5+ | 180+ |
By this standard, the DFW metro average of 11.8 GPG (202 PPM) officially...