Upper Lake Hardisty System
PWS ID: 090605025 · Upper Lake, 09 95485
Population Served
98
Total Violations
206
Health-Based Violations
3
Water Source
Groundwater
System Details
- System Type
- Community
- Owner Type
- Native American
- Connections
- 39
- School/Daycare
- No
- MCL Violations
- 3
- Monitoring Violations
- 70
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Coliform (TCR) | MR | 19 | 2012 |
| Nitrate | MR | 5 | 2003 |
| Coliform (TCR) | MCL | 3 | 1992 |
| Lead and Copper Rule | MR | 2 | 1996 |
| Consumer Confidence Rule | Other | 2 | 2002 |
| Cadmium | MR | 1 | 1996 |
| Chromium | MR | 1 | 1996 |
| Fluoride | MR | 1 | 1996 |
| Selenium | MR | 1 | 1996 |
| BHC-GAMMA | MR | 1 | 1996 |
| Methoxychlor | MR | 1 | 1996 |
| Carbofuran | MR | 1 | 1996 |
| Atrazine | MR | 1 | 1996 |
| LASSO | MR | 1 | 1996 |
| 2,4-D | MR | 1 | 1996 |
| 2,4,5-TP | MR | 1 | 1996 |
| Pentachlorophenol | MR | 1 | 1996 |
| Xylenes, Total | MR | 1 | 1996 |
| o-Dichlorobenzene | MR | 1 | 1996 |
| 1,1,1-Trichloroethane | MR | 1 | 1996 |
| Tetrachloroethylene | MR | 1 | 1996 |
| CHLOROBENZENE | MR | 1 | 1996 |
| Benzene | MR | 1 | 1996 |
| Toluene | MR | 1 | 1996 |
| Ethylbenzene | MR | 1 | 1996 |
| Styrene | MR | 1 | 1996 |
| Toxaphene | MR | 1 | 1996 |
| Vinyl chloride | MR | 1 | 1996 |
| Barium | MR | 1 | 1996 |
| Mercury | MR | 1 | 1996 |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
This data is provided for informational purposes only.