- EPA's UCMR 5 testing looked for 30 contaminants here and found 2.
- Lithium: found in 7 of 32 samples, average 2.77 µg/L, highest 18.2 µg/L (EPA UCMR 5 testing, Oct 2024–Jul 2025)
- PFBA (a PFAS): found in 2 of 32 samples, average 0.40 ppt, highest 7.1 ppt (EPA UCMR 5 testing, Oct 2024–Jul 2025)
- Lead, 90th percentile: 0.8 ppb at the latest result in EPA records for a monitoring period that ran on or after July 1, 2021, at or below EPA's 15 ppb action level (EPA SDWIS, monitoring period Jan 1, 2026–Jun 30, 2026). The 90th percentile is a system-wide measure from homes sampled under EPA's lead rule; it isn't a result for your home.
- Health-based violation: Stage 2 Disinfectants and Disinfection Byproducts Rule, TTHM, from Apr 2026, with no return-to-compliance action in EPA records (EPA SDWIS)
- Health-based violation: Stage 2 Disinfectants and Disinfection Byproducts Rule, TTHM, from Jan 2026, with no return-to-compliance action in EPA records (EPA SDWIS)
- Health-based violation: Stage 2 Disinfectants and Disinfection Byproducts Rule, TTHM, from Oct 2025, with no return-to-compliance action in EPA records (EPA SDWIS)
- Health-based violation: Surface Water Treatment Rules, Interim Enhanced Surface Water Treatment Rule, Jul 2025–Sep 2025 (EPA SDWIS)
- Health-based violation: Surface Water Treatment Rules, Interim Enhanced Surface Water Treatment Rule, Jul 2025–Sep 2025 (EPA SDWIS)
- Health-based violation: Stage 2 Disinfectants and Disinfection Byproducts Rule, TTHM, from Jul 2025, with no return-to-compliance action in EPA records (EPA SDWIS)
Public EPA test results
Can you drink Canyon Lake tap water? What EPA records show
EPA TX0460019 · serves Comal County, TX · about 44,196 people (EPA SDWIS)
This report shows EPA's federal records for this water system: UCMR 5 testing, lead testing and violations. It isn't a test of the water at your tap, and it has no Water Score.
Public EPA test results
CLWSC Canyon Lake Shores (EPA TX0460019)
ScoreYourWater.com gives no verdict on your tap water; it shows what the public records say, as of October 14, 2026. For Canyon Lake's main utility, CLWSC Canyon Lake Shores: 6 health-based violations since July 1, 2021 in EPA records (EPA SDWIS). PFOA and PFOS were not detected at or above EPA's reporting level in EPA's UCMR 5 testing.
What EPA records show for CLWSC Canyon Lake Shores, as of October 14, 2026
6 health-based violations since July 1, 2021 in EPA records (EPA SDWIS).
Lead, 90th percentile: 0.8 ppb at the latest result in EPA records for a monitoring period that ran on or after July 1, 2021, at or below EPA's 15 ppb action level (EPA SDWIS, monitoring period Jan 1, 2026–Jun 30, 2026). The 90th percentile is a system-wide measure from homes sampled under EPA's lead rule; it isn't a result for your home.
EPA's UCMR 5 testing looked for 30 contaminants here and found 2.
PFOA and PFOS were not detected at or above EPA's reporting level in EPA's UCMR 5 testing.
Source: EPA records (SDWIS, UCMR 5). SDWIS: data as of Oct 14, 2026. EPA UCMR 5 data, samples through June 2026.
Your water bill names your utility.
Does CLWSC Canyon Lake Shores use chloramine?
We didn't find chloramine in CLWSC Canyon Lake Shores's EPA treatment records. That's not a complete list; your utility's annual water quality report says which disinfectant it uses.
What EPA records show for this system
Reported results in EPA records (data as of Oct 14–15, 2026)
Source: EPA SDWIS (ECHO SDWA bulk download), data as of Oct 14, 2026
Source: EPA UCMR 5 occurrence data, data as of Oct 15, 2026
These are EPA's public records for this water system, shown as of October 14, 2026. If you represent this utility, or think a record here is wrong, tell us: Report an error. If the error is in EPA's own records, your state drinking water program can correct it there, and this page updates at our next data refresh.
Sources
- EPA ECHO detailed facility report: CLWSC Canyon Lake Shores (TX0460019), July to September 2026 extract
- EPA SDWIS (ECHO SDWA bulk download), July to September 2026 extract
- EPA UCMR 5 occurrence data, samples through June 2026
Questions people ask
Is Canyon Lake tap water safe to drink?
We don't give a safe or unsafe verdict. Here is what the public data shows: EPA records for Canyon Lake's main utility, CLWSC Canyon Lake Shores, as of October 14, 2026. 6 health-based violations since July 1, 2021 in EPA records (EPA SDWIS). PFOA and PFOS were not detected at or above EPA's reporting level in EPA's UCMR 5 testing. A guideline and a legal limit are different things, and this is public data, not a test of your tap.
Which utility supplies water in Canyon Lake?
CLWSC Canyon Lake Shores is the main utility for Canyon Lake in EPA's records (EPA TX0460019), serving about 44,196 people (EPA SDWIS). Your water bill names your utility.
Does Canyon Lake tap water contain PFAS?
PFOA and PFOS were not detected at or above EPA's reporting level in EPA's UCMR 5 testing. This is public data, not a test of your tap.
How recent is this data?
Source: EPA records (SDWIS, UCMR 5). SDWIS: data as of Oct 14, 2026. EPA UCMR 5 data, samples through June 2026. Data may be one to three years old and may not reflect the water at your tap. If you want your own tap tested, use a state-certified laboratory.
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