Table 1.
Summary of water samples collected in 2012–2014
| Site number | Sampling location | Number of samplesa |
|---|---|---|
| Municipal sewage effluent (n = 57) | ||
| 1 | Tampere, Viinikanlahti | 8 (1b) |
| 2 | Tampere, Rahola | 8 |
| 3 | Nokia, Kullaanvuori | 8 (1b) |
| 4 | Nokia, Siuro | 8 (1b) |
| 5 | Sastamala, Mouhijärvi | 8 (1b) |
| 6 | Sastamala, Vammala | 9 |
| 7 | Sastamala, Äetsä | 8 (1b) |
| Municipal sewage influent (n = 7) | ||
| 1 | From the sewage effluent sampling sites (1 to 7) | 7 |
| Industrial effluent and mine runoff (n = 20) | ||
| 1 | Industry I | 7 (1b) |
| 2 | Industry II | 9 |
| 3 | Mine | 4 |
| Surface water (n = 119) | ||
| 1 | Ratinanvuolle (tributary) | 8 (1b) |
| 2 | Pyhäjärvi, depth 1 m (lake region) | 8 |
| Pyhäjärvi, depth 10 m (lake region) | 5 | |
| Pyhäjärvi, depth 40 m (lake region) | 5 | |
| 3 | Rajasaari (lake region) | 4 |
| 4 | Sotkanvirta (tributary) | 8 (1b) |
| 5 | Nokiankoski (upstream) | 8 |
| 6 | Nokiankoski (downstream) | 8 (1b) |
| 7 | Siuronkoski (tributary) | 8 |
| 8 | Hiedanvuolle | 8 |
| 9 | Rautavesi | 8 |
| 10 | Liekovesi | 8 (1b) |
| 11 | Keikyä | 8 |
| 12 | Karhiniemi (raw water) | 5 |
| 13 | Karhiniemi | 8 |
| 14 | Loimijoki (tributary) | 8 |
| 15 | Kojo, Kolsi | 4 |
| Drinking water treatment process with AGR (n = 40) | ||
| 1 | Pretreated water | 11 |
| 2 | Groundwater observation well 1 | 9 |
| 3 | Groundwater observation well 2 | 9 (2b) |
| 4 | Production well | 11 (1b) |
| Total [N = 243] (13b) | ||
a n = total number of samples in each sample group. Drinking water treatment samples were collected in each season between autumn 2012 and autumn 2014. The rest of the sample groups were sampled from autumn 2012 to spring 2014 except the municipal sewage influent sample, which was collected only once during the autumn 2013 sampling campaign. The samples marked as b had low sequence reads and were not included for further analysis. The total number of samples remaining for further analysis was 230