PFOA
Not detected above reporting limit
- Sample date
- Reporting limit
- 0.004 µg/L
- Sample ID
- 35045754009SE1
PUBLIC WATER SYSTEM
San Antonio Water System
Water testing, compliance records and water sources for this system. Check your utility bill to confirm your provider.
TX0150018Open in the atlas →Public drinking-water record
Drinking-water testing
San Antonio Water System · TX0150018. These are public water-system records, not a test of the tap water at your home.
PFAS testing
6 PFAS sample results had reported detections. Most recent PFAS sample shown here: .
PFOS
Not detected above reporting limit
- Sample date
- Reporting limit
- 0.004 µg/L
- Sample ID
- 35045754001SE1
PFBS
0.0038 µg/L
- Sample date
- Reporting limit
- 0.003 µg/L
- Sample ID
- 35921466001SE2
Selected latest compound samples from the published federal system record. Multiple sample points may share a date. A detection does not establish a violation. A non-detection does not mean PFAS-free. PFOA and PFOS limits and regulatory context are separate from these historical samples.
Lead and copper
Lead: 0.0016 mg/L, period ending 2024-12-31. These are system 90th-percentile results, not individual household concentrations.
Drinking-water compliance
No current violations flagged; past records available. 0 current flags and 22 historical records in the federal publication dated September 1, 2026. Historical records are not all active violations.
EPA UCMR5 source and sampling program · EPA ECHO compliance and lead/copper records
Drinking water & contaminants
Drinking-water testing and compliance
Compliance records, PFAS sampling, and lead and copper results answer different questions. None is a test of a particular home's faucet.
Recency unconfirmed · Date unavailableEPA ECHO / SDWIS federal snapshot
The source does not provide a publication date. The last check date is not recorded. This report may not describe conditions today.
EPA ECHO / SDWIS · 2026 Q2 snapshot
No current violations flagged; past records available
This means no current violation is flagged in this snapshot. It does not prove that every tap is contaminant-free.
- People served
- 2,643,729
- Historical records
- 22
- Source type
- Purchased surface water
Compliance history
22 violation records
Federal and primacy-agency regulatory history reported in EPA ECHO/SDWIS; not a household tap-water test.
PFAS / UCMR5
Several PFAS compounds were detected in these samples
2,639 compound results in the 2023–2026 UCMR5 final release. Non-detection means not detected above the reporting limit in that sample—not that PFAS never occurs.
Lead & copper
15 system-level results
System-level lead/copper 90th-percentile reporting; not the lead or copper level at a particular faucet. This system-wide inventory does not identify the pipes at your address.
Consumer Confidence Report
Find your annual water-quality report
Your utility’s annual Consumer Confidence Report describes its water sources and testing results. Contact the utility for its latest report.
Learn about annual water-quality reportsMeasurement coverage
No measurements available here
We do not have measurements to show for San Antonio Water System in this section. Explore the connections below for related waters and water providers.
No measurement history available here
We do not have historical measurements to show for San Antonio Water System. This does not mean it is unmonitored or that its water is safe or unsafe. You can still explore the information and source links on this page.
Water sources
Where the water comes from
San Antonio Water System receives water from Wilcox Aquifer, Edwards Aquifer, Trinity Aquifer, Canyon Lake, Vista Ridge Pipeline, and Carrizo Aquifer, according to the source records.
The links show sources and suppliers, not the amount being delivered today. Select one for its source record.
Sources traced upstreamSource coverage does not measure water quality or reliability.
Your water system
Sources and conveyance
Further upstream
Sources and relationships as a list
Documented current sources or suppliers for San Antonio Water System include Wilcox Aquifer, Edwards Aquifer, Trinity Aquifer, Canyon Lake, Vista Ridge Pipeline and Carrizo Aquifer. A relationship does not by itself establish the current delivered amount.
- San Antonio Water System uses groundwater from Wilcox Aquifer. Current. The relationship is documented; a current delivered amount is not available.
- San Antonio Water System uses groundwater from Edwards Aquifer. Current. The relationship is documented; a current delivered amount is not available.
- San Antonio Water System uses groundwater from Trinity Aquifer. Current. The relationship is documented; a current delivered amount is not available.
- San Antonio Water System draws from Canyon Lake. Current. The relationship is documented; a current delivered amount is not available.
- San Antonio Water System supplied by Vista Ridge Pipeline. Current. maximum contract amount: 50,000 acre feet per year, current contract (authorized).
- San Antonio Water System uses groundwater from Carrizo Aquifer. Current. The relationship is documented; a current delivered amount is not available.
- Vista Ridge Pipeline draws from Carrizo Aquifer. Current. The relationship is documented; a current delivered amount is not available.
- Vista Ridge Pipeline draws from Simsboro Aquifer. Current. The relationship is documented; a current delivered amount is not available.
Water source types explained
Surface waterWater drawn from rivers, lakes, or reservoirs.
GroundwaterWater pumped from aquifers—bodies of rock or sediment that store and transmit groundwater, not underground lakes.
Wholesale waterA regional supplier can supply your local provider without serving your household directly.
Imported waterYour drinking-water source basin can differ from the watershed where you live.
Connected water system
Wilcox Aquifer · Detail page unavailable
Edwards Aquifer · Detail page unavailable
Trinity Aquifer · Detail page unavailable
Canyon LakereservoirExplore →Vista Ridge Pipeline · Detail page unavailable
Carrizo Aquifer · Detail page unavailable