COVID-⁠19 Switzerland

Information on the current situation, as of 6 December 2022

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

Epidemiological course,Switzerland and Liechtenstein

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 103 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). Seasonal fluctuations in the non-⁠permanent population, which influence the viral load particularly in busy tourist areas, are not included. Wastewater treatment plants (WWTP) no longer participating in the project will not be included when calculating the proportion of viral load per category. However, historical measurements will still be available when viewing the development over time.

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. Recently, the time frame desired can be selected with the slider below the graph.

Geographical distribution

Viral load in wastewater, Switzerland and Liechtenstein, 07.02.2022 to 05.12.2022

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 Population coverage Relative viral load Difference to previous week
AG Aarau AG Aarau 78 255 49,5% 38,3
AG Aarburg AG Aarburg 30 884 63,3% 58,3
AG Baden AG Baden 59 560 25,4% 20,7
AG Bremgarten AG Bremgarten 22 613 19,1% 15,4
AG Brugg AG Brugg 46 250 49,6% 47,4
AG Kaisten AG Kaisten 25 354 0,9% -
AG Lenzburg AG Lenzburg 54 568 53,2% -
AG Reinach AG Reinach 23 817 1,0% -
AG Wohlen AG Wohlen 31 992 26,5% 22,9
AG Zofingen AG Zofingen 35 577 3,6% −8,9
AI Appenzell (Boedeli) AI Appenzell (Boedeli) 11 877 8,5% 3,0
AR Herisau (Bachwis) AR Herisau (Bachwis) 16 500 15,5% −6,2
BE Aarwangen (Zala) BE Aarwangen (Zala) 40 845 16,3% −1,8
BE Biel BE Biel 85 389 40,8% 23,3
BE Grindelwald BE Grindelwald 4153 19,7% 15,0
BE Interlaken BE Interlaken 27 945 32,0% 12,9
BE Laupen BE Laupen 62 000 30,8% −11,8
BE Lauterbrunnen BE Lauterbrunnen 2553 7,4% 4,6
BE Lyss BE Lyss 36 358 100,0% 89,8
BE Mittl. Emmental BE Mittl. Emmental 25 733 12,1% 5,9
BE Moossee-Urtenenbach BE Moossee-Urtenenbach 33 844 22,2% 16,6
BE Region Bern BE Region Bern 224 557 11,0% −2,8
BE Saanen BE Saanen 9253 37,9% 13,7
BE Thunersee BE Thunersee 124 550 8,9% −3,8
BE Worblental BE Worblental 71 636 21,0% 6,5
BS Basel BS Basel 273 075 15,4% 6,0
FL Liechtenstein FL Liechtenstein 39 315 22,7% 8,7
FR Fribourg (Aele) FR Fribourg (Aele) 44 211 27,5% −1,0
FR Vuippens (Ais) FR Vuippens (Ais) 34 647 42,3% 11,1
GE Aire GE Aire 451 771 67,1% 3,0
GE Satigny/Bois-de-Bay GE Satigny/Bois-de-Bay 79 577 19,5% 7,6
GE Thonex/Villette GE Thonex/Villette 51 028 9,2% 5,2
GL Glarnerland GL Glarnerland 49 644 24,7% 7,4
GR Arosa GR Arosa 2049 1,1% −3,0
GR Cazis (Waldau) GR Cazis (Waldau) 10 963 10,5% −7,5
GR Chur GR Chur 55 000 13,0% −7,6
GR Davos (Gadenstatt) GR Davos (Gadenstatt) 9706 25,2% 1,3
GR Klosters (Gulfia) GR Klosters (Gulfia) 3155 88,4% 13,8
GR Landquart GR Landquart 17 054 10,2% −14,5
GR Poschiavo (Li Geri) GR Poschiavo (Li Geri) 3358 21,0% 1,6
GR S-chanf (Oberengadin) GR S-chanf (Oberengadin) 15 056 27,3% 11,5
GR Schluein (Gruob) GR Schluein (Gruob) 7823 40,9% 11,5
GR Scuol (Sot Ruinas) GR Scuol (Sot Ruinas) 3473 19,2% 5,0
GR Seewis (Vorderes Prättigau) GR Seewis (Vorderes Prättigau) 8003 13,7% −4,7
JU Delemont (Sede) JU Delemont (Sede) 36 484 30,1% 16,3
JU Porrentruy (Sepe) JU Porrentruy (Sepe) 16 500 51,3% −5,0
LU Buholz (Real) LU Buholz (Real) 183 511 29,4% −2,3
LU Rontal LU Rontal 28 771 55,4% 10,0
NE Colombier (La Saunerie) NE Colombier (La Saunerie) 27 582 32,6% 2,3
NE La-Chaux-de-Fonds NE La-Chaux-de-Fonds 35 360 7,8% 0,6
NE Neuchatel NE Neuchatel 40 697 39,9% 14,7
NW Stans (Rotzwinkel) NW Stans (Rotzwinkel) 21 214 33,7% −6,0
OW Alpnach (Sarneraatal) OW Alpnach (Sarneraatal) 30 657 62,3% 36,5
OW Engelberg OW Engelberg 4053 10,0% −5,6
SG Altenrhein SG Altenrhein 64 000 21,0% 1,5
SG Au (Rosenbergsau) SG Au (Rosenbergsau) 41 281 26,6% 15,0
SG Bad Ragaz SG Bad Ragaz 12 007 9,8% 0,6
SG Buchs SG Buchs 24 844 1,3% −5,0
SG Flawil (Oberglatt) SG Flawil (Oberglatt) 30 378 15,7% 2,6
SG Flums (Seez) SG Flums (Seez) 12 448 2,1% −2,7
SG Rapperswil-Jona SG Rapperswil-Jona 28 168 13,9% 2,3
SG St.Gallen (Au) SG St.Gallen (Au) 37 876 6,8% 2,3
SG St.Gallen (Hofen) SG St.Gallen (Hofen) 57 031 10,1% -
SG Steinach (Morgental) SG Steinach (Morgental) 30 710 9,2% −0,1
SG Wil SG Wil 26 295 13,5% 10,8
SH Hallau (Klettgau) SH Hallau (Klettgau) 14 795 7,6% −2,4
SH Neuhausen A/Rhf. (Roeti) SH Neuhausen A/Rhf. (Roeti) 56 967 19,2% 15,4
SH Ramsen (Bibertal-Hegau) SH Ramsen (Bibertal-Hegau) 100 338 6,5% −4,3
SO Grenchen (Buerenamt) SO Grenchen (Buerenamt) 46 563 25,7% −0,5
SO Winznau (Zv Olten) SO Winznau (Zv Olten) 54 540 24,3% 16,0
SO Zuchwil (Soloth.-Emme) SO Zuchwil (Soloth.-Emme) 95 793 16,3% 5,9
SZ Hoefe SZ Hoefe 29 624 21,0% −15,3
SZ Schwyz SZ Schwyz 31 164 48,2% −13,1
SZ Untermarch SZ Untermarch 29 470 17,7% −24,5
TG Frauenfeld TG Frauenfeld 36 369 15,6% 13,2
TG Hefenhofen (Aachtal, Moos) TG Hefenhofen (Aachtal, Moos) 23 074 13,5% 10,2
TG Weinfelden (Mittelthurgau) TG Weinfelden (Mittelthurgau) 31 342 30,2% 18,0
TI Bellinzona (Giubiasco) TI Bellinzona (Giubiasco) 53 209 80,2% 35,4
TI Chiasso (Vacallo) TI Chiasso (Vacallo) 26 638 64,7% 32,3
TI Locarno (Foce Maggia) TI Locarno (Foce Maggia) 50 781 73,0% 30,7
TI Locarno (Foce Ticino) TI Locarno (Foce Ticino) 24 516 41,2% −7,8
TI Lugano TI Lugano 124 000 27,0% −4,9
TI Mendrisio (Rancate) TI Mendrisio (Rancate) 29 392 53,4% −10,4
UR Altdorf UR Altdorf 33 940 41,1% −13,1
VD Commugny VD Commugny 22 575 38,2% −12,8
VD Gland (Apec) VD Gland (Apec) 36 034 44,7% 3,3
VD Lausanne (Vidy) VD Lausanne (Vidy) 247 824 27,1% −25,4
VD Montreux/Pierrier VD Montreux/Pierrier 41 383 31,8% −13,2
VD Morges VD Morges 39 126 29,7% 11,8
VD Nyon VD Nyon 25 753 17,3% -
VD Vevey (Aviron) VD Vevey (Aviron) 53 864 32,2% −2,2
VD Yverdon VD Yverdon 35 462 43,1% −11,1
VS Bagnes-Le Châble VS Bagnes-Le Châble 7713 59,4% -
VS Brig-Glis (Briglina) VS Brig-Glis (Briglina) 28 678 37,0% 8,8
VS Goms VS Goms 4193 11,3% −31,2
VS Martigny VS Martigny 39 643 24,9% 17,3
VS Sierre/Noes VS Sierre/Noes 32 480 42,9% −9,8
VS Sion/Chateauneuf VS Sion/Chateauneuf 35 632 20,0% 3,4
VS Zermatt VS Zermatt 5507 21,3% 18,2
ZG Cham (Schoenau) ZG Cham (Schoenau) 146 942 48,8% −1,7
ZH Affoltern am Albis ZH Affoltern am Albis 30 226 21,1% −3,0
ZH Andelfingen ZH Andelfingen 7150 34,7% 16,4
ZH Bülach ZH Bülach 35 612 17,5% 3,1
ZH Dietikon (Limeco) ZH Dietikon (Limeco) 83 367 30,5% −3,1
ZH Dübendorf (Ika Neugut) ZH Dübendorf (Ika Neugut) 39 622 37,6% 14,5
ZH Horgen ZH Horgen 26 952 46,0% 14,1
ZH Illnau-Effretikon ZH Illnau-Effretikon 18 921 26,1% −6,3
ZH Meilen (Rorguet) ZH Meilen (Rorguet) 26 447 25,0% −9,2
ZH Niederglatt (Fischb.-Gl.) ZH Niederglatt (Fischb.-Gl.) 43 596 39,0% 10,6
ZH Uster (Jungholz) ZH Uster (Jungholz) 41 303 33,5% −3,8
ZH Werdhölzli ZH Werdhölzli 471 000 15,3% −5,3
ZH Wetzikon (Flos) ZH Wetzikon (Flos) 31 419 43,8% 9,0
ZH Winterthur ZH Winterthur 140 403 43,8% −8,7
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Source: FOPH – Status: 06.12.2022, 08.00h
Geographic distribution over time

View the development of the virus load in wastewater at various WWTPs in Switzerland and Liechtenstein.

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Development over time

Viral load in wastewater, Switzerland and Liechtenstein, 07.02.2022 to 05.12.2022

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.
Niederglatt (Fischb.-⁠Gl.), ZH Population coverage: 43 596
7-⁠⁠day average from 02.12.2022
Relative viral load 39,0%
Absolute viral load 2.7e+13
Difference to previous week 10,6pp
Measured
7-⁠⁠day average

Relative viral load

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covid19.admin.ch
Source: FOPH – Status: 06.12.2022, 08.00h