PIONEER ELEMENTARY SCHOOL
PWS ID: CA0900111 · SOMERSET, California 95684
Population Served
227
Total Violations
51
Health-Based Violations
4
Water Source
Groundwater
System Details
- System Type
- Non-Transient Non-Community
- Owner Type
- Local
- Connections
- 19
- County
- El Dorado
- School/Daycare
- Yes
- MCL Violations
- 3
- Monitoring Violations
- 42
- Treatment Tech Violations
- 1
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Lead and Copper Rule | MR | 8 | 2024 |
| Coliform (TCR) | MCL | 3 | 2008 |
| Revised Total Coliform Rule | MON | 2 | 2022 |
| Nitrate-Nitrite | MR | 2 | 2021 |
| Consumer Confidence Rule | Other | 2 | 2022 |
| Diquat | MR | 1 | 2019 |
| Benzo(a)pyrene | MR | 1 | 2019 |
| Carbofuran | MR | 1 | 2019 |
| Di(2-ethylhexyl) phthalate | MR | 1 | 2019 |
| Atrazine | MR | 1 | 2019 |
| 2,4,5-TP | MR | 1 | 2019 |
| Methoxychlor | MR | 1 | 2019 |
| Glyphosate | MR | 1 | 2019 |
| Simazine | MR | 1 | 2019 |
| OXAMYL | MR | 1 | 2019 |
| Toxaphene | MR | 1 | 2019 |
| HEXACHLOROBENZENE | MR | 1 | 2019 |
| LASSO | MR | 1 | 2019 |
| Di(2-ethylhexyl) adipate | MR | 1 | 2019 |
| BHC-GAMMA | MR | 1 | 2019 |
| Chlordane | MR | 1 | 2019 |
| Picloram | MR | 1 | 2019 |
| Total Polychlorinated Biphenyls (PCB) | MR | 1 | 2019 |
| LEAD AND COPPER RULE REVISIONS | TT | 1 | 2024 |
| Heptachlor epoxide | MR | 1 | 2019 |
| 1,2-DIBROMO-3-CHLOROPROPANE | MR | 1 | 2019 |
| Heptachlor | MR | 1 | 2019 |
| LEAD AND COPPER RULE REVISIONS | RPT | 1 | 2024 |
| Endothall | MR | 1 | 2019 |
| Endrin | MR | 1 | 2019 |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
This data is provided for informational purposes only.