ROCKY NOOK ASSOCIATION, INC.
PWS ID: IA2817710 · DELHI, Iowa 52223
Population Served
50
Total Violations
250
Health-Based Violations
52
Water Source
Groundwater
System Details
- System Type
- Transient Non-Community
- Owner Type
- Private
- Connections
- 46
- County
- Delaware
- School/Daycare
- No
- MCL Violations
- 48
- Monitoring Violations
- 124
- Treatment Tech Violations
- 4
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Coliform (TCR) | MR | 61 | 2015 |
| Nitrate | MR | 60 | 2015 |
| Coliform (TCR) | MCL | 40 | 2007 |
| Public Notice | Other | 29 | 2016 |
| Nitrate | MCL | 8 | 1998 |
| Revised Total Coliform Rule | TT | 4 | 2018 |
| Nitrite | MR | 3 | 1995 |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
This data is provided for informational purposes only.