COVID-⁠19 Switzerland

Information on the current situation, as of 16 August 2022

The key figures will be published each Tuesday at 15:30.

Epidemiological course,Fribourg

Viral load in wastewater

The data published here are based on information obtained from the federal government's national wastewater monitoring system. Since January 2022, the national wastewater monitoring system of Switzerland and the Principality of Liechtenstein has determined the SARS-⁠CoV-⁠2 viral load in the wastewater of 99 wastewater treatment plants (WWTP) at regular intervals.

Wastewater samples are collected from wastewater treatment plants three to six times per week. The absolute viral load (gene copies/day) is specified per 100,000 inhabitants. A dilution factor based on the wastewater treatment plant's flow volume is taken into account, for instance during dry periods. The relative viral load is the measured viral load (gene copies/litre) as a proportion of the historically measured maximum value. The proportion of relative viral load is calculated by dividing the proportion of absolute viral load by the proportion of the historic maximum viral load value. The residential population comprises the catchment area of each wastewater treatment plant (WWTP).

Detailed information on the measuring methods and terminology can be found on the Eawag website. New findings may lead to changes in the calculation of the data.

Geographical distribution

Viral load in wastewater, Fribourg, 07.02.2022 to 15.08.2022

The graph shows the relative viral load in per cent as a 7-⁠day average in the wastewater treatment plants (WWTPs) and the difference in viral load compared with the previous week in percentage points (pp) in Switzerland and Liechtenstein. The percentage point figure is used to compare percentages. The 7-⁠day relative share refers to the historical maximum values for each wastewater treatment plant.
Cant. Name Resident population Relative viral load Difference to previous week
AG Aarau AG Aarau 78 255 37,8% 25,4
AG Aarburg AG Aarburg 30 884 16,5% 14,3
AG Baden AG Baden 59 560 21,1% 14,8
AG Bremgarten AG Bremgarten 22 613 8,3% 3,6
AG Brugg AG Brugg 46 250 19,1% 12,1
AG Kaisten AG Kaisten 25 354 2,7% 0,8
AG Lenzburg AG Lenzburg 54 568 36,7% 30,3
AG Reinach AG Reinach 23 817 1,0% -
AG Wohlen AG Wohlen 31 992 27,9% 15,8
AG Zofingen AG Zofingen 35 577 2,5% −2,7
AI Appenzell (Boedeli) AI Appenzell (Boedeli) 11 877 18,3% 3,7
AR Herisau (Bachwis) AR Herisau (Bachwis) 16 500 8,1% 3,9
BE Aarwangen (Zala) BE Aarwangen (Zala) 40 845 9,5% 3,1
BE Biel BE Biel 85 389 6,9% 1,2
BE Burgdorf BE Burgdorf 36 465 23,0% 23,0
BE Grindelwald BE Grindelwald 4153 19,1% −9,6
BE Interlaken BE Interlaken 27 945 24,5% 1,3
BE Laupen BE Laupen 62 000 7,9% −0,9
BE Lauterbrunnen BE Lauterbrunnen 2553 23,1% −4,6
BE Lyss BE Lyss 36 358 8,3% 3,8
BE Mittl. Emmental BE Mittl. Emmental 25 733 3,3% −5,1
BE Moossee-Urtenenbach BE Moossee-Urtenenbach 33 844 2,3% −0,9
BE Region Bern BE Region Bern 224 557 3,5% 0,2
BE Saanen BE Saanen 9253 6,1% −2,6
BE Thunersee BE Thunersee 124 550 6,1% −2,4
BE Worblental BE Worblental 71 636 14,3% 7,9
BS Basel BS Basel 273 075 9,2% −21,6
FR Fribourg (Aele) FR Fribourg (Aele) 44 211 4,8% −1,3
FR Vuippens (Ais) FR Vuippens (Ais) 34 647 11,0% 4,7
GE Aire GE Aire 451 771 19,9% 4,9
GE Satigny/Bois-de-Bay GE Satigny/Bois-de-Bay 79 577 22,9% 10,3
GE Thonex/Villette GE Thonex/Villette 51 028 11,9% 7,2
GL Glarnerland GL Glarnerland 49 644 9,5% 5,6
GR Arosa GR Arosa 2049 11,0% 0,4
GR Chur GR Chur 55 000 5,2% −3,0
GR Davos (Gadenstatt) GR Davos (Gadenstatt) 9706 9,8% −5,4
GR S-chanf (Oberengadin) GR S-chanf (Oberengadin) 15 056 20,3% −4,4
JU Delemont (Sede) JU Delemont (Sede) 36 484 3,2% 1,1
JU Porrentruy (Sepe) JU Porrentruy (Sepe) 16 500 11,5% −0,8
LU Buholz (Real) LU Buholz (Real) 183 511 34,5% 4,1
LU Rontal LU Rontal 28 771 18,3% −39,7
NE Colombier (La Saunerie) NE Colombier (La Saunerie) 27 582 1,6% −4,0
NE La-Chaux-de-Fonds NE La-Chaux-de-Fonds 35 360 0,7% 0,3
NE Neuchatel NE Neuchatel 40 697 14,8% 5,1
NW Stans (Rotzwinkel) NW Stans (Rotzwinkel) 21 214 42,5% 10,7
OW Alpnach (Sarneraatal) OW Alpnach (Sarneraatal) 30 657 42,5% 19,7
OW Engelberg OW Engelberg 4053 7,0% −36,1
SG Altenrhein SG Altenrhein 64 000 12,6% 5,8
SG Au (Rosenbergsau) SG Au (Rosenbergsau) 41 281 8,3% 0,7
SG Bad Ragaz SG Bad Ragaz 12 007 4,6% −3,6
SG Buchs SG Buchs 24 844 13,7% 6,6
SG Flawil (Oberglatt) SG Flawil (Oberglatt) 30 378 3,5% −6,4
SG Flums (Seez) SG Flums (Seez) 12 448 4,2% −0,2
SG Rapperswil-Jona SG Rapperswil-Jona 28 168 4,1% −1,5
SG St.Gallen (Au) SG St.Gallen (Au) 37 876 3,0% −1,3
SG St.Gallen (Hofen) SG St.Gallen (Hofen) 57 031 4,7% −1,3
SG Steinach (Morgental) SG Steinach (Morgental) 30 710 4,4% 0,0
SG Wil SG Wil 26 295 3,0% −2,3
SH Hallau (Klettgau) SH Hallau (Klettgau) 14 795 10,1% 4,8
SH Neuhausen A/Rhf. (Roeti) SH Neuhausen A/Rhf. (Roeti) 56 967 9,3% 0,4
SH Ramsen (Bibertal-Hegau) SH Ramsen (Bibertal-Hegau) 100 338 7,3% −0,6
SO Grenchen (Buerenamt) SO Grenchen (Buerenamt) 46 563 6,6% −3,6
SO Winznau (Zv Olten) SO Winznau (Zv Olten) 54 540 4,7% −2,5
SO Zuchwil (Soloth.-Emme) SO Zuchwil (Soloth.-Emme) 95 793 4,5% −2,0
SZ Hoefe SZ Hoefe 29 624 11,6% −15,1
SZ Schwyz SZ Schwyz 31 164 18,8% −4,4
SZ Untermarch SZ Untermarch 29 470 7,3% −11,9
TG Frauenfeld TG Frauenfeld 36 369 2,5% -
TG Hefenhofen (Aachtal, Moos) TG Hefenhofen (Aachtal, Moos) 23 074 1,3% −1,1
TG Weinfelden (Mittelthurgau) TG Weinfelden (Mittelthurgau) 31 342 9,4% 2,1
TI Bellinzona (Giubiasco) TI Bellinzona (Giubiasco) 53 209 11,6% −7,0
TI Chiasso (Vacallo) TI Chiasso (Vacallo) 26 638 14,2% −10,8
TI Locarno (Foce Maggia) TI Locarno (Foce Maggia) 50 781 17,7% −9,3
TI Locarno (Foce Ticino) TI Locarno (Foce Ticino) 24 516 15,7% −20,5
TI Lugano TI Lugano 124 000 11,6% 1,7
TI Mendrisio (Rancate) TI Mendrisio (Rancate) 29 392 16,8% −5,6
UR Altdorf UR Altdorf 33 940 11,1% −13,1
VD Commugny VD Commugny 22 575 21,2% 1,2
VD Gland (Apec) VD Gland (Apec) 36 034 10,5% −6,6
VD Lausanne (Vidy) VD Lausanne (Vidy) 247 824 7,0% −7,1
VD Montreux/Pierrier VD Montreux/Pierrier 41 383 5,3% −10,3
VD Morges VD Morges 39 126 4,9% −3,2
VD Nyon VD Nyon 25 753 26,0% 2,3
VD Vevey (Aviron) VD Vevey (Aviron) 53 864 8,0% −4,0
VD Yverdon VD Yverdon 35 462 31,9% -
ZG Cham (Schoenau) ZG Cham (Schoenau) 146 942 16,2% −21,7
ZH Affoltern am Albis ZH Affoltern am Albis 30 226 10,6% −17,2
ZH Andelfingen ZH Andelfingen 7150 11,1% −3,3
ZH Bülach ZH Bülach 35 612 7,5% −11,8
ZH Dietikon (Limeco) ZH Dietikon (Limeco) 83 367 16,9% −4,9
ZH Dübendorf (Ika Neugut) ZH Dübendorf (Ika Neugut) 39 622 9,9% −32,4
ZH Horgen ZH Horgen 26 952 17,6% 2,9
ZH Illnau-Effretikon ZH Illnau-Effretikon 18 921 24,7% 8,8
ZH Meilen (Rorguet) ZH Meilen (Rorguet) 26 447 8,8% −1,4
ZH Niederglatt (Fischb.-Gl.) ZH Niederglatt (Fischb.-Gl.) 43 596 21,9% 3,6
ZH Uster (Jungholz) ZH Uster (Jungholz) 41 303 15,3% −10,5
ZH Werdhölzli ZH Werdhölzli 471 000 11,1% 2,3
ZH Wetzikon (Flos) ZH Wetzikon (Flos) 31 419 12,9% −3,7
ZH Winterthur ZH Winterthur 140 403 31,5% 14,1
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Source: FOPH – Status: 16.08.2022, 08.00h

Development over time

The figure shows the 7-⁠day average absolute and relative viral load in percent in the wastewater treatment plants (WWTP) and the difference from the previous week's 7-⁠day average in percentage points (pp) in Switzerland and Liechtenstein. The relative proportion per 7-⁠day period refers to the historically measured maximum value per wastewater treatment plant.

Data only available for individual WWTP
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