| Clue | Source | Date |
|---|---|---|
| Govt. water-testing sites | LA Times Daily | 24 Feb 2019 |
| Govt. water-testing sites | The Washington Post | 24 Feb 2019 |
| Govt. water-testing sites | ||
| Testing facilities for an eco-friendly org. | ||
| Some fed. govt. testing sites | ||
| Some pesticide test sites |