St. Hedwig
TX

Is St. Hedwig, TX Tap Water Safe to Drink?

St. Hedwig tap water meets federal Safe Drinking Water Act standards but 2 of 2 ZIP codes show detections above EPA health guidelines, primarily for lithium. A certified filter is recommended for households that want an additional layer of protection.

3Water systems
2ZIP codes
100%ZIPs above EPA guideline
Metro areaSan Antonio-New Braunfels, TX
Latest data2025-11-12

Where Does St. Hedwig Get Its Water?

Water in St. Hedwig, TX is provided by 3 public water systems: SAN ANTONIO WATER SYSTEM, EAST CENTRAL SUD and GREEN VALLEY SUD.

How Is St. Hedwig Tap Water Treated?

Treated water is disinfected using chloramines and free chlorine and ozone and on-site generated disinfectant. Treatment includes conventional treatment (coagulation, flocculation, and filtration), direct filtration, granular activated carbon filtration, groundwater disinfection, membrane filtration, post-ozone biofiltration and slow sand filtration.

What's in St. Hedwig Tap Water?

The following contaminants were detected most frequently in St. Hedwig public water systems. 2 of 2 ZIP codes showed detections above EPA health guidelines.

ContaminantPeak detectedEPA guidelineZIPs detectedStatus
lithium 41 µg/L 10 µg/L 2 ZIPs Above guideline
PFTrDA 0.007 µg/L — 0 ZIPs Within guideline
11Cl-PF3OUdS 0.005 µg/L — 0 ZIPs Within guideline
HFPO-DA 0.005 µg/L — 0 ZIPs Within guideline
PFBA 0.005 µg/L — 0 ZIPs Within guideline

Health Risk Profile for St. Hedwig

Based on EPA monitoring data, 2 of 2 ZIP codes in St. Hedwig have recorded detections above EPA health guidelines. Sensitive populations such as infants, pregnant individuals, and those with weakened immune systems may benefit from an additional layer of protection such as a certified point-of-use filter.

Best Broad-Spectrum Filters for This Water Profile

This city profile includes PFAS detections, chlorine disinfection, and other dissolved contaminants. Reverse osmosis (RO) systems certified under NSF/ANSI 58 provide broad reduction coverage; for PFAS specifically, confirm NSF/ANSI P473 or equivalent PFAS reduction certification.

Waterdrop G3P600 Reverse Osmosis System
Under-sink RO system

8-stage tankless RO system certified to NSF/ANSI 58, reduces 1,000+ contaminants including PFAS, lead, arsenic, fluoride, and nitrates.

See recommendations matched to your exact address: choose your ZIP code below.

Frequently Asked Questions about St. Hedwig Tap Water

Is St. Hedwig tap water safe to drink?

St. Hedwig tap water meets Safe Drinking Water Act requirements but 2 of 2 ZIP codes show contaminant levels above EPA health-based guidelines. A certified point-of-use filter adds an extra layer of protection.

What contaminants are in St. Hedwig tap water?

The most commonly detected contaminants in St. Hedwig water systems include: lithium, PFTrDA, 11Cl-PF3OUdS. See the ZIP-level reports for exact measurements and EPA guideline comparisons.

Where does St. Hedwig get its drinking water?

St. Hedwig receives water from 3 public water systems, including SAN ANTONIO WATER SYSTEM.

Do I need a water filter in St. Hedwig?

If your ZIP code is among those with detections above EPA health guidelines, choose a filter certified for the specific contaminants shown in your ZIP report. Reverse osmosis is generally the broadest option for PFAS, lithium, and many other dissolved contaminants.

How often is St. Hedwig tap water tested?

Public water systems in St. Hedwig are required by the EPA to test for regulated contaminants on schedules ranging from daily (for microbials and disinfectants) to annual or triennial (for many chemical contaminants). Results are published in annual Consumer Confidence Reports (CCRs). The data on this page reflects the most recent available EPA monitoring results, with the latest sample date of 2025-11-12.

Tap water reports by ZIP in St. Hedwig

Water utilities serving St. Hedwig, TX

Service area boundaries are approximate and based on state filings or modeled estimates. Contact your utility to confirm exact service at a specific address.

Modeled boundaries are shown with a dashed outline.

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