NORTHERN HILLS WATER SERVICE
PWS ID: TX0910126 · KATY, Texas 77450-4721
Population Served
264
Total Violations
317
Health-Based Violations
16
Water Source
Surface Water
System Details
- System Type
- Community
- Owner Type
- Private
- Connections
- 88
- County
- Grayson
- School/Daycare
- No
- MCL Violations
- 12
- Monitoring Violations
- 232
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Revised Total Coliform Rule | MON | 100 | 2023 |
| Chlorine | MR | 50 | 2020 |
| Public Notice | Other | 36 | 2024 |
| Total Haloacetic Acids (HAA5) | MR | 24 | 2021 |
| TTHM | MR | 24 | 2021 |
| Consumer Confidence Rule | Other | 23 | 2020 |
| Lead and Copper Rule | MR | 22 | 2023 |
| TTHM | MCL | 12 | 2009 |
| Nitrate | MR | 8 | 2020 |
| Chloramine | MRDL | 4 | 2021 |
| Nitrite | MR | 4 | 2020 |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
This data is provided for informational purposes only.