CLWSC CANYON LAKE SHORES
PWS ID: TX0460019 · CANYON LAKE, Texas 78133-0005
PFAS Detected
2 PFAS "forever chemicals" detected in testing under EPA's UCMR5 monitoring program.
Population Served
44,196
Total Violations
142
Health-Based Violations
43
Water Source
Surface Water
System Details
- System Type
- Community
- Owner Type
- Private
- Connections
- 14,732
- County
- Comal
- School/Daycare
- No
- MCL Violations
- 37
- Monitoring Violations
- 93
- Treatment Tech Violations
- 6
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| TTHM | MCL | 17 | 2025 |
| Total Haloacetic Acids (HAA5) | MCL | 16 | 2005 |
| Surface Water Treatment Rule | MR | 11 | 2021 |
| Revised Total Coliform Rule | MON | 7 | 2024 |
| Interim Enhanced Surface Water Treatment Rule | TT | 6 | 2025 |
| Coliform (TCR) | MCL | 4 | 2010 |
| OXAMYL | MR | 4 | 2021 |
| Aldicarb sulfoxide | MR | 4 | 2021 |
| Aldicarb sulfone | MR | 4 | 2021 |
| Carbofuran | MR | 4 | 2021 |
| Aldicarb | MR | 4 | 2021 |
| Coliform (TCR) | MR | 4 | 2004 |
| E. COLI | MR | 4 | 2010 |
| Nitrate | MR | 3 | 2010 |
| TTHM | MR | 3 | 2025 |
| Public Notice | Other | 3 | 2010 |
| Consumer Confidence Rule | Other | 2 | 2003 |
| Interim Enhanced Surface Water Treatment Rule | MR | 2 | 2005 |
| Lead and Copper Rule | MR | 1 | 2012 |
| Methoxychlor | MR | 1 | 2007 |
| Toxaphene | MR | 1 | 2007 |
| Simazine | MR | 1 | 2007 |
| Di(2-ethylhexyl) phthalate | MR | 1 | 2007 |
| Atrazine | MR | 1 | 2007 |
| LASSO | MR | 1 | 2007 |
| Heptachlor epoxide | MR | 1 | 2007 |
| HEXACHLOROBENZENE | MR | 1 | 2007 |
| Pentachlorophenol | MR | 1 | 2007 |
| DICHLOROMETHANE | MR | 1 | 2008 |
| p-Dichlorobenzene | MR | 1 | 2008 |
PFAS Testing Results (UCMR5)
Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 9 of 960 samples detected PFAS.
| Contaminant | Date | Result | MRL | Status |
|---|---|---|---|---|
| 11Cl-PF3OUdS | 7/29/2025 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| 9Cl-PF3ONS | 7/29/2025 | <0.002 µg/L | 0.002 µg/L | Not Detected |
| PFHxA | 7/29/2025 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFDA | 7/29/2025 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFEESA | 7/29/2025 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFOA | 7/29/2025 | <0.004 µg/L | 0.004 µg/L | Not Detected |
| PFBS | 7/29/2025 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFHpA | 7/29/2025 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFHxS | 7/29/2025 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFNA | 7/29/2025 | <0.004 µg/L | 0.004 µg/L | Not Detected |
| PFOS | 7/29/2025 | <0.004 µg/L | 0.004 µg/L | Not Detected |
| ADONA | 7/29/2025 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFMBA | 7/29/2025 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| lithium | 7/29/2025 | <9 µg/L | 9 µg/L | Not Detected |
| HFPO-DA | 7/29/2025 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| PFBA | 7/29/2025 | 0.0071 µg/L | 0.005 µg/L | Detected |
| 6:2 FTS | 7/29/2025 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| 4:2 FTS | 7/29/2025 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| 8:2 FTS | 7/29/2025 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| PFMPA | 7/29/2025 | <0.004 µg/L | 0.004 µg/L | Not Detected |
| PFPeA | 7/29/2025 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| NFDHA | 7/29/2025 | <0.02 µg/L | 0.02 µg/L | Not Detected |
| PFPeS | 7/29/2025 | <0.004 µg/L | 0.004 µg/L | Not Detected |
| PFHpS | 7/29/2025 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFUnA | 7/29/2025 | <0.002 µg/L | 0.002 µg/L | Not Detected |
| NEtFOSAA | 7/29/2025 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| PFTrDA | 7/29/2025 | <0.007 µg/L | 0.007 µg/L | Not Detected |
| PFTA | 7/29/2025 | <0.008 µg/L | 0.008 µg/L | Not Detected |
| NMeFOSAA | 7/29/2025 | <0.006 µg/L | 0.006 µg/L | Not Detected |
| PFDoA | 7/29/2025 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFHpA | 7/29/2025 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFHxA | 7/29/2025 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFDA | 7/29/2025 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFOA | 7/29/2025 | <0.004 µg/L | 0.004 µg/L | Not Detected |
| PFOS | 7/29/2025 | <0.004 µg/L | 0.004 µg/L | Not Detected |
| lithium | 7/29/2025 | <9 µg/L | 9 µg/L | Not Detected |
| PFHxS | 7/29/2025 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFBS | 7/29/2025 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| 11Cl-PF3OUdS | 7/29/2025 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| PFUnA | 7/29/2025 | <0.002 µg/L | 0.002 µg/L | Not Detected |
| PFNA | 7/29/2025 | <0.004 µg/L | 0.004 µg/L | Not Detected |
| PFTA | 7/29/2025 | <0.008 µg/L | 0.008 µg/L | Not Detected |
| 9Cl-PF3ONS | 7/29/2025 | <0.002 µg/L | 0.002 µg/L | Not Detected |
| PFDoA | 7/29/2025 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| NMeFOSAA | 7/29/2025 | <0.006 µg/L | 0.006 µg/L | Not Detected |
| PFTrDA | 7/29/2025 | <0.007 µg/L | 0.007 µg/L | Not Detected |
| PFHpS | 7/29/2025 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFPeS | 7/29/2025 | <0.004 µg/L | 0.004 µg/L | Not Detected |
| NFDHA | 7/29/2025 | <0.02 µg/L | 0.02 µg/L | Not Detected |
| PFEESA | 7/29/2025 | <0.003 µg/L | 0.003 µg/L | Not Detected |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
PFAS data from EPA UCMR5 monitoring program (2023-2025).
This data is provided for informational purposes only.