San Antonio, Texas
SAWS Main system, Edwards and other aquifers. Free chlorine residual is printed. Hardness is not on the 2025 Main table we opened — we did not invent grains.
- Free chlorineavg 1.41 ppm
On the report
- Water utility
- San Antonio Water System
- Hardness
- Not printed on the 2025 SAWS Main report table we opened. Open that PDF or test the tap. This file does not copy an Edwards-aquifer folklore number. — SAWS 2025 Water Quality Report (Main)
- Disinfectant
- Free chlorine residual, 2024 data in the 2025 Main report: average 1.41 ppm (0.14–6.40). — SAWS 2025 Water Quality Report (Main)
- Brine / salt to the sewer
- No district prohibition found in current research. No SAWS residential brine ban like Measure S turned up. Ask the sewer utility on the bill.
Also around here
Extra context besides the utility report and the chart above — geology, an unregulated table, or a published study. Not a second set of printed tap numbers.
- MicroplasticsWHO’s 2019 review examined studies that found microplastic particles in treated tap and bottled water in many places. That is a published-occurrence finding, not a number from this city’s water-quality report, and we do not invent a particles-per-liter count for the tap.Microplastics in drinking-water — World Health Organization
- Pharmaceuticals in Edwards rechargeUSGS, with SAWS, sampled pharmaceuticals in the San Antonio segment of the Edwards aquifer recharge zone. They reported detections more often in recharging streams than in groundwater. That is a basin study, not a SAWS distribution average.Occurrence of pharmaceutical compounds in the San Antonio segment of the Edwards aquifer — U.S. Geological Survey / San Antonio Water System
- PFASEPA’s Fifth Unregulated Contaminant Monitoring Rule required community systems this size to test 29 PFAS and lithium in 2023–2025. Open the UCMR 5 Data Finder for this PWS. This file does not invent a detection.Fifth Unregulated Contaminant Monitoring Rule — U.S. Environmental Protection Agency
What actually fits
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If a dealer is selling hardness equipment
Open the current CCR for grains. This file does not invent a number from a ranking site. A salt softener needs a drain if it is legal at the address.
Shop salt-based softenersShop salt-free conditionersShop water test kits
If the shower just smells like the pool
That is chlorine. A whole-house carbon filter with an NSF/ANSI 42 chlorine claim is the usual match. A softener will not take chlorine out.
If you are shopping a PFAS listing for the kitchen
The under-sink RO we actually run is Cloud RO — NSF/ANSI 58, kitchen tap, not a whole-house tank. Check the exact listing if PFAS is why you are shopping. Waterdrop is a tankless option if you want that path. A certifier-listed pitcher is the cheap first step. Nobody is paying for a medical claim.
Shop Cloud ROShop Waterdrop reverse osmosisShop PFAS-listed pitchers
If you have not tested the tap
A homeowner kit is a start. It is not a state-certified lab. Use a certified lab when the decision is expensive.
Sources
- 2025 Water Quality Report — Main — San Antonio Water System. Accessed 2026-08-31.
Updated August 31, 2026. A city file is chemistry we can cite plus the sewer rule. No invented detections.