NATIONAL OILWELL
PWS ID: TX0900012 · HOUSTON, Texas 77042-4103
Population Served
325
Total Violations
166
Health-Based Violations
3
Water Source
Groundwater
System Details
- System Type
- Non-Transient Non-Community
- Owner Type
- Private
- Connections
- 20
- County
- Gray
- School/Daycare
- No
- MCL Violations
- 0
- Monitoring Violations
- 145
- Treatment Tech Violations
- 3
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Lead and Copper Rule | MR | 33 | 2024 |
| Chlorine | MR | 24 | 2021 |
| Coliform (TCR) | MR | 8 | 2013 |
| Revised Total Coliform Rule | MON | 8 | 2021 |
| Public Notice | Other | 5 | 2025 |
| TTHM | MR | 4 | 2021 |
| Total Haloacetic Acids (HAA5) | MR | 4 | 2021 |
| Endrin | MR | 4 | 2022 |
| BHC-GAMMA | MR | 4 | 2022 |
| Di(2-ethylhexyl) adipate | MR | 4 | 2022 |
| Simazine | MR | 4 | 2022 |
| Di(2-ethylhexyl) phthalate | MR | 4 | 2022 |
| Hexachlorocyclopentadiene | MR | 4 | 2022 |
| Atrazine | MR | 4 | 2022 |
| Heptachlor | MR | 4 | 2022 |
| Pentachlorophenol | MR | 4 | 2022 |
| Chlordane | MR | 4 | 2022 |
| HEXACHLOROBENZENE | MR | 4 | 2022 |
| Toxaphene | MR | 4 | 2022 |
| LASSO | MR | 4 | 2022 |
| Heptachlor epoxide | MR | 4 | 2022 |
| Benzo(a)pyrene | MR | 4 | 2022 |
| Methoxychlor | MR | 4 | 2022 |
| LEAD AND COPPER RULE REVISIONS | TT | 3 | 2024 |
| LEAD AND COPPER RULE REVISIONS | RPT | 3 | 2024 |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
This data is provided for informational purposes only.