TIMBERLAKE
PWS ID: IA5200810 · OXFORD, Iowa 52322
Population Served
52
Total Violations
216
Health-Based Violations
82
Water Source
Groundwater
System Details
- System Type
- Community
- Owner Type
- Private
- Connections
- 20
- County
- Johnson
- School/Daycare
- No
- MCL Violations
- 82
- Monitoring Violations
- 79
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Coliform (TCR) | MCL | 82 | 2011 |
| Gross Alpha, Excl. Radon and U | MR | 11 | 1987 |
| Coliform (TCR) | MR | 11 | 2006 |
| Consumer Confidence Rule | Other | 10 | 2024 |
| Nitrate | MR | 9 | 2023 |
| Public Notice | Other | 6 | 2025 |
| Arsenic | MR | 5 | 1986 |
| Cadmium | MR | 5 | 1986 |
| Fluoride | MR | 5 | 1986 |
| Mercury | MR | 5 | 1986 |
| Selenium | MR | 5 | 1986 |
| Lead and Copper Rule | MR | 5 | 1989 |
| Chromium | MR | 5 | 1986 |
| Nitrite | MR | 4 | 2023 |
| Total Haloacetic Acids (HAA5) | MR | 3 | 2024 |
| TTHM | MR | 3 | 2024 |
| Barium | MR | 2 | 1986 |
| Combined Radium (-226 and -228) | MR | 1 | 1980 |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
This data is provided for informational purposes only.