SCUA Bylas
PWS ID: 090400110 · San Carlos, 09 85550
Population Served
3,160
Total Violations
516
Health-Based Violations
77
Water Source
Groundwater
System Details
- System Type
- Community
- Owner Type
- Native American
- Connections
- 573
- School/Daycare
- No
- MCL Violations
- 59
- Monitoring Violations
- 345
- Treatment Tech Violations
- 18
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Coliform (TCR) | MR | 114 | 2015 |
| Coliform (TCR) | MCL | 55 | 2014 |
| Consumer Confidence Rule | Other | 16 | 2022 |
| Public Notice | Other | 16 | 2023 |
| Revised Total Coliform Rule | RPT | 14 | 2023 |
| Groundwater Rule | TT | 12 | 2023 |
| E. COLI | MR | 10 | 2018 |
| Chlorine | MR | 7 | 2025 |
| Nitrate | MR | 5 | 2010 |
| Total Polychlorinated Biphenyls (PCB) | MR | 5 | 2008 |
| 1,2-DIBROMO-3-CHLOROPROPANE | MR | 5 | 2008 |
| Arsenic | MR | 4 | 2008 |
| Cadmium | MR | 4 | 2008 |
| Barium | MR | 4 | 2008 |
| Chromium | MR | 4 | 2008 |
| Mercury | MR | 4 | 2008 |
| Selenium | MR | 4 | 2008 |
| BHC-GAMMA | MR | 4 | 2008 |
| Toxaphene | MR | 4 | 2008 |
| Methoxychlor | MR | 4 | 2008 |
| Carbofuran | MR | 4 | 2008 |
| Atrazine | MR | 4 | 2008 |
| LASSO | MR | 4 | 2008 |
| Heptachlor | MR | 4 | 2008 |
| Heptachlor epoxide | MR | 4 | 2008 |
| 2,4-D | MR | 4 | 2008 |
| 2,4,5-TP | MR | 4 | 2008 |
| Pentachlorophenol | MR | 4 | 2008 |
| Chlordane | MR | 4 | 2008 |
| Revised Total Coliform Rule | MCL | 4 | 2024 |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
This data is provided for informational purposes only.