Table of Contents

1. [Understanding 272 PPM: What the Numbers Actually Mean](#understanding-272-ppm)

2. [The Edwards Aquifer: How Karst Limestone Creates Extreme Hardness](#the-edwards-aquifer)

3. [SAWS Water Quality: What the Official Data Shows](#saws-water-quality)

4. [Beyond Hardness: Radium, PFAS, and Emerging Contaminants](#beyond-hardness)

5. [San Antonio vs. Houston vs. Dallas vs. Austin: A Hardness Comparison](#city-comparison)

6. [The Hard Water Corridor: Boerne, New Braunfels, San Marcos, and Kyle](#surrounding-cities)

7. [The True Cost of Hard Water in San Antonio](#cost-of-hard-water)

8. [Treatment Solutions That Work for SA Water](#treatment-solutions)

9. [San Antonio's Top Water Treatment Companies](#local-companies)

10. [FAQ: 10 Questions San Antonio Homeowners Ask Most](#faq)

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Understanding 272 PPM: What the Numbers Actually Mean {#understanding-272-ppm}

Water hardness is measured by the concentration of dissolved calcium carbonate (CaCO3) equivalents in your water. When the San Antonio Water System (SAWS) reports a hardness reading of 272 PPM, that means every liter of water flowing through your pipes contains approximately 272 milligrams of dissolved calcium and magnesium minerals.

The standard classification scale, established by the United States Geological Survey (USGS) and adopted by the Water Quality Association (WQA), breaks down as follows:

| Classification | PPM Range | GPG Range |

|---------------|-----------|-----------|

| Soft | 0\u201360 | 0\u20133.5 |

| Moderately Hard | 61\u2013120 | 3.5\u20137.0 |

| Hard | 121\u2013180 | 7.0\u201310.5 |

| Very Hard | 181+ | 10.5+ |

San Antonio's 272\u2013290 PPM reading places it firmly in the "Very Hard" category \u2014 and not just barely over the line. At 16\u201317 GPG, San Antonio's water is roughly 50% harder than the threshold for "Very Hard" classification. Among major Texas cities with populations exceeding 500,000, San Antonio consistently registers the highest municipal...