CRYSTAL CLEAR SUD
PWS ID: TX0940015 · SAN MARCOS, Texas 78666-2100
PFAS Detected
2 PFAS "forever chemicals" detected in testing under EPA's UCMR5 monitoring program.
Population Served
20,766
Total Violations
401
Health-Based Violations
192
Water Source
Surface Water
System Details
- System Type
- Community
- Owner Type
- Local
- Connections
- 6,922
- County
- Guadalupe
- School/Daycare
- No
- MCL Violations
- 46
- Monitoring Violations
- 204
- Treatment Tech Violations
- 146
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Long Term 2 Enhanced Surface Water Treatment Rule | TT | 144 | 2015 |
| Interim Enhanced Surface Water Treatment Rule | MR | 138 | 2015 |
| TTHM | MCL | 28 | 2019 |
| Total Haloacetic Acids (HAA5) | MCL | 18 | 2019 |
| Lead and Copper Rule | MR | 7 | 2019 |
| E. COLI | MR | 4 | 2017 |
| Revised Total Coliform Rule | MON | 4 | 2017 |
| Nitrate | MR | 4 | 2012 |
| Surface Water Treatment Rule | TT | 2 | 2012 |
| Public Notice | Other | 2 | 2019 |
| Toxaphene | MR | 1 | 2019 |
| Trichloroethylene | MR | 1 | 2019 |
| Vinyl chloride | MR | 1 | 2019 |
| Di(2-ethylhexyl) phthalate | MR | 1 | 2019 |
| Mercury | MR | 1 | 2019 |
| Pentachlorophenol | MR | 1 | 2019 |
| Benzo(a)pyrene | MR | 1 | 2019 |
| cis-1,2-Dichloroethylene | MR | 1 | 2019 |
| Hexachlorocyclopentadiene | MR | 1 | 2019 |
| Chromium | MR | 1 | 2019 |
| Endrin | MR | 1 | 2019 |
| Beryllium, Total | MR | 1 | 2019 |
| Simazine | MR | 1 | 2019 |
| Thallium, Total | MR | 1 | 2019 |
| 1,2-Dichloroethane | MR | 1 | 2019 |
| 1,1-Dichloroethylene | MR | 1 | 2019 |
| 1,1,2-Trichloroethane | MR | 1 | 2019 |
| HEXACHLOROBENZENE | MR | 1 | 2019 |
| BHC-GAMMA | MR | 1 | 2019 |
| Heptachlor epoxide | MR | 1 | 2019 |
PFAS Testing Results (UCMR5)
Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 7 of 420 samples detected PFAS.
| Contaminant | Date | Result | MRL | Status |
|---|---|---|---|---|
| PFDA | 8/22/2024 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFBS | 8/22/2024 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| lithium | 8/22/2024 | <9 µg/L | 9 µg/L | Not Detected |
| PFTA | 8/22/2024 | <0.008 µg/L | 0.008 µg/L | Not Detected |
| PFTrDA | 8/22/2024 | <0.007 µg/L | 0.007 µg/L | Not Detected |
| NEtFOSAA | 8/22/2024 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| NMeFOSAA | 8/22/2024 | <0.006 µg/L | 0.006 µg/L | Not Detected |
| 8:2 FTS | 8/22/2024 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| 9Cl-PF3ONS | 8/22/2024 | <0.002 µg/L | 0.002 µg/L | Not Detected |
| ADONA | 8/22/2024 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| HFPO-DA | 8/22/2024 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| PFBA | 8/22/2024 | 0.0056 µg/L | 0.005 µg/L | Detected |
| PFOS | 8/22/2024 | <0.004 µg/L | 0.004 µg/L | Not Detected |
| 4:2 FTS | 8/22/2024 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFHpA | 8/22/2024 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFMPA | 8/22/2024 | <0.004 µg/L | 0.004 µg/L | Not Detected |
| PFPeA | 8/22/2024 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFMBA | 8/22/2024 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFEESA | 8/22/2024 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFOA | 8/22/2024 | <0.004 µg/L | 0.004 µg/L | Not Detected |
| 6:2 FTS | 8/22/2024 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| NFDHA | 8/22/2024 | <0.02 µg/L | 0.02 µg/L | Not Detected |
| PFNA | 8/22/2024 | <0.004 µg/L | 0.004 µg/L | Not Detected |
| PFHxS | 8/22/2024 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| 11Cl-PF3OUdS | 8/22/2024 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| PFDoA | 8/22/2024 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFHxA | 8/22/2024 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFUnA | 8/22/2024 | <0.002 µg/L | 0.002 µg/L | Not Detected |
| PFHpS | 8/22/2024 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFPeS | 8/22/2024 | <0.004 µg/L | 0.004 µg/L | Not Detected |
| PFEESA | 8/22/2024 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| ADONA | 8/22/2024 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFBA | 8/22/2024 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| 6:2 FTS | 8/22/2024 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| 4:2 FTS | 8/22/2024 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| 8:2 FTS | 8/22/2024 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| PFMPA | 8/22/2024 | <0.004 µg/L | 0.004 µg/L | Not Detected |
| 11Cl-PF3OUdS | 8/22/2024 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| PFMBA | 8/22/2024 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| 9Cl-PF3ONS | 8/22/2024 | <0.002 µg/L | 0.002 µg/L | Not Detected |
| NFDHA | 8/22/2024 | <0.02 µg/L | 0.02 µg/L | Not Detected |
| PFPeS | 8/22/2024 | <0.004 µg/L | 0.004 µg/L | Not Detected |
| PFHpS | 8/22/2024 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFTA | 8/22/2024 | <0.008 µg/L | 0.008 µg/L | Not Detected |
| PFTrDA | 8/22/2024 | <0.007 µg/L | 0.007 µg/L | Not Detected |
| NEtFOSAA | 8/22/2024 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| NMeFOSAA | 8/22/2024 | <0.006 µg/L | 0.006 µg/L | Not Detected |
| PFPeA | 8/22/2024 | 0.0038 µg/L | 0.003 µg/L | Detected |
| PFUnA | 8/22/2024 | <0.002 µg/L | 0.002 µg/L | Not Detected |
| PFHxS | 8/22/2024 | <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.