| Keyword | CPC | PCC | Volume | Score |
|---|---|---|---|---|
| nwis usgs | 0.08 | 0.1 | 8413 | 96 |
| nwis usgs mapper | 1.24 | 0.1 | 1715 | 71 |
| usgs + nwis | 1.43 | 0.5 | 1841 | 99 |
| usgs nwis web | 1.91 | 0.4 | 9009 | 52 |
| usgs nwis ok | 0.59 | 0.8 | 7714 | 19 |
| usgs national water information system nwis | 0.34 | 0.3 | 4217 | 9 |
| usgs nwis data | 1.71 | 0.3 | 6310 | 40 |
