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Summary of sampling campaigns.
| Freshwater type | Environments | Samples (first campaign) | Samples (second campaign) |
|---|---|---|---|
| Groundwater | Buenos aires well field, Santiago system, Zona Metropolitana aquifer | 40 | 10 |
| Rivers | Pesquería River, Santa Catarina River, La Silla River | 12 | 12 |
| Surface water reservoirs | El Cuchillo dam, Cerro Prieto dam, La Boca dam | 7 | 9 |
