World wastewater treatment plant observatory · data as reported by each inventory

Wastewater treatment plants in Switzerland

705 inventory records · European Environment Agency — Waterbase-UWWTD, data call 2023 (versión final pública)

Data years: 2022. The inventory date does not establish current operation.

705 results

Name	Native size	Year
ZUERICH(WERDHOELZLI)CH_WWTP_026101	670,000 population equivalent (p.e.)	2022
VERNIER/AIRECH_WWTP_664301	600,000 population equivalent (p.e.)	2022
PRATTELN/RHEINCH_WWTP_283100	500,000 population equivalent (p.e.)	2022
ARA REGION BERN AGCH_WWTP_035100	500,000 population equivalent (p.e.)	2022
BASELCH_WWTP_270101	480,000 population equivalent (p.e.)	2022
LAUSANNECH_WWTP_558600	412,500 population equivalent (p.e.)	2022
Regionale ARA-VispCH_WWTP_629700	388,833 population equivalent (p.e.)	2022
Monthey-CIMOCH_WWTP_615300	360,000 population equivalent (p.e.)	2022
ARA Buholz / ARA REALCH_WWTP_102400	270,000 population equivalent (p.e.)	2022
CHAM(SCHOENAU)CH_WWTP_170200	245,000 population equivalent (p.e.)	2022
WORBLENTALCH_WWTP_036200	220,000 population equivalent (p.e.)	2022
WINTERTHURCH_WWTP_023001	200,000 population equivalent (p.e.)	2022
THUNERSEECH_WWTP_094400	200,000 population equivalent (p.e.)	2022
FRIBOURGCH_WWTP_219600	187,500 population equivalent (p.e.)	2022
Bioggio (Lugano)CH_WWTP_515100	186,700 population equivalent (p.e.)	2022
ARA BirsCH_WWTP_276600	150,000 population equivalent (p.e.)	2022
BISCHOFSZELLCH_WWTP_447100	150,000 population equivalent (p.e.)	2022
BIELCH_WWTP_073300	140,000 population equivalent (p.e.)	2022
Bibertal-HegauCH_WWTP_296300	135,000 population equivalent (p.e.)	2022
ChurCH_WWTP_390101	133,333 population equivalent (p.e.)	2022
SATIGNY/BOIS-DE-BAYCH_WWTP_663801	130,000 population equivalent (p.e.)	2022
DUEBENDORFCH_WWTP_019101	129,100 population equivalent (p.e.)	2022
ZUCHWIL(SOLOTH.-EMME)CH_WWTP_253400	125,000 population equivalent (p.e.)	2022
Thal - AltenrheinCH_WWTP_323700	120,000 population equivalent (p.e.)	2022
AARAUCH_WWTP_400100	118,593 population equivalent (p.e.)	2022
WINZNAU(ZV OLTEN)CH_WWTP_250100	110,000 population equivalent (p.e.)	2022
NEUHAUSEN A/RHF.(ROETI)CH_WWTP_293700	110,000 population equivalent (p.e.)	2022
DIETIKON(LIMMATTAL)CH_WWTP_024301	110,000 population equivalent (p.e.)	2022
Au - RosenbergsauCH_WWTP_323100	105,833 population equivalent (p.e.)	2022
Kläranlage GlarnerlandCH_WWTP_160200	105,000 population equivalent (p.e.)	2022
VERNIER-OUEST(GIVAUDAN)CH_WWTP_664302	97,676 population equivalent (p.e.)	2022
Sierre-NoësCH_WWTP_624801	97,500 population equivalent (p.e.)	2022
LENZBURGCH_WWTP_420300	96,483 population equivalent (p.e.)	2022
SCHOENENWERDCH_WWTP_258300	92,500 population equivalent (p.e.)	2022
OBERENGADINCH_WWTP_378802	90,000 population equivalent (p.e.)	2022
ESTAVAYER-LE-LAC (ERES)CH_WWTP_201700	88,750 population equivalent (p.e.)	2022
SENSETAL (LAUPEN)CH_WWTP_066700	87,500 population equivalent (p.e.)	2022
BADENCH_WWTP_404200	87,156 population equivalent (p.e.)	2022
LYSSCH_WWTP_030600	85,000 population equivalent (p.e.)	2022
ZALA AGCH_WWTP_032101	85,000 population equivalent (p.e.)	2022
VEVEYCH_WWTP_589000	83,000 population equivalent (p.e.)	2022
FRAUENFELDCH_WWTP_456600	80,000 population equivalent (p.e.)	2022
Giubiasco (Bellinzona)CH_WWTP_500200	80,000 population equivalent (p.e.)	2022
VUIPPENS (AIS)CH_WWTP_216100	80,000 population equivalent (p.e.)	2022
Foce Maggia (Locarno)CH_WWTP_511302	78,500 population equivalent (p.e.)	2022
St.Gallen - HofenCH_WWTP_320401	76,500 population equivalent (p.e.)	2022
NEUCHATELCH_WWTP_645800	75,000 population equivalent (p.e.)	2022
SCHWYZCH_WWTP_137200	70,000 population equivalent (p.e.)	2022
GRENCHEN(BUERENAMT)CH_WWTP_254600	67,500 population equivalent (p.e.)	2022
Sion-ChâteauneufCH_WWTP_626601	66,667 population equivalent (p.e.)	2022
Steinach - MorgentalCH_WWTP_321700	66,600 population equivalent (p.e.)	2022
St.Gallen - AuCH_WWTP_320302	66,000 population equivalent (p.e.)	2022
Kläranlage Oberes WiggertalCH_WWTP_113400	66,000 population equivalent (p.e.)	2022
OPFIKON-KLOTENCH_WWTP_006602	65,000 population equivalent (p.e.)	2022
ARA SARNERAATALCH_WWTP_140100	65,000 population equivalent (p.e.)	2022
BRUGGCH_WWTP_412300	64,879 population equivalent (p.e.)	2022
MartignyCH_WWTP_613600	64,700 population equivalent (p.e.)	2022
ALTDORFCH_WWTP_120101	64,000 population equivalent (p.e.)	2022
ZOFINGENCH_WWTP_428000	62,730 population equivalent (p.e.)	2022
Kläranlage SurentalCH_WWTP_110400	62,500 population equivalent (p.e.)	2022
STEP SEDECH_WWTP_670900	62,500 population equivalent (p.e.)	2022
MONTREUXCH_WWTP_588600	62,250 population equivalent (p.e.)	2022
Rancate (Mendrisio)CH_WWTP_525400	62,000 population equivalent (p.e.)	2022
Domat/Ems (Tuma Lunga)CH_WWTP_372211	60,000 population equivalent (p.e.)	2022
WEINFELDEN(MITTELTHURGAU)CH_WWTP_494600	60,000 population equivalent (p.e.)	2022
ZermattCH_WWTP_630000	60,000 population equivalent (p.e.)	2022
Bagnes-Le ChâbleCH_WWTP_603102	59,120 population equivalent (p.e.)	2022
ARA Ergolz 2CH_WWTP_282500	57,700 population equivalent (p.e.)	2022
YVERDON-LES-BAINSCH_WWTP_593800	57,500 population equivalent (p.e.)	2022
Flawil - OberglattCH_WWTP_340200	56,667 population equivalent (p.e.)	2022
MORGESCH_WWTP_564200	56,250 population equivalent (p.e.)	2022
Briglina-BrigCH_WWTP_600200	55,000 population equivalent (p.e.)	2022
MEILENCH_WWTP_015601	52,500 population equivalent (p.e.)	2022
BURGDORFCH_WWTP_040100	52,000 population equivalent (p.e.)	2022
MOOSSEE-URTENENBACHCH_WWTP_041100	52,000 population equivalent (p.e.)	2022
MATZINGEN(LAUCHETAL-MURGTAL)CH_WWTP_459100	50,000 population equivalent (p.e.)	2022
NYONCH_WWTP_572400	50,000 population equivalent (p.e.)	2022
LA-CHAUX-DE-FONDSCH_WWTP_642100	50,000 population equivalent (p.e.)	2022
THONEX/VILLETTECH_WWTP_664000	50,000 population equivalent (p.e.)	2022
USTERCH_WWTP_019801	48,000 population equivalent (p.e.)	2022
VILLARS-SUR-GLANECH_WWTP_222800	47,500 population equivalent (p.e.)	2022
AARBURGCH_WWTP_427100	47,365 population equivalent (p.e.)	2022
DARDAGNY(FIRMENICH1)CH_WWTP_662002	47,000 population equivalent (p.e.)	2022
Kläranlage RontalCH_WWTP_106500	47,000 population equivalent (p.e.)	2022
MITTL.EMMENTALCH_WWTP_095600	46,000 population equivalent (p.e.)	2022
BuchsCH_WWTP_327100	45,600 population equivalent (p.e.)	2022
REINACHCH_WWTP_414100	45,249 population equivalent (p.e.)	2022
FAELLANDEN(BACHWIS)CH_WWTP_019301	45,000 population equivalent (p.e.)	2022
HOEFECH_WWTP_132200	45,000 population equivalent (p.e.)	2022
BUELACHCH_WWTP_005301	44,500 population equivalent (p.e.)	2022
RHEINFELDENCH_WWTP_425800	44,032 population equivalent (p.e.)	2022
Davos (Gadenstatt)CH_WWTP_385102	44,000 population equivalent (p.e.)	2022
WAEDENSWILCH_WWTP_014201	44,000 population equivalent (p.e.)	2022
Foce Ticino (Locarno)CH_WWTP_511301	43,500 population equivalent (p.e.)	2022
HEFENHOFEN(AACHTAL,MOOS)CH_WWTP_441600	42,000 population equivalent (p.e.)	2022
LUCENSCH_WWTP_567500	42,000 population equivalent (p.e.)	2022
WOHLENCH_WWTP_408200	41,717 population equivalent (p.e.)	2022
Nendaz-BieudronCH_WWTP_602403	40,500 population equivalent (p.e.)	2022
ZWINGEN(LAUFENTAL-L-TAL)CH_WWTP_279300	40,000 population equivalent (p.e.)	2022
Rapperswil-JonaCH_WWTP_333500	40,000 population equivalent (p.e.)	2022

Regulatory context

Verification pending. This is not an exhaustive review of applicable law.

Switzerland: water protection and cantonal authorization

Human legal review pending. FOEN identifies the federal Swiss water-protection framework and describes micropollutant equipment for selected WWTPs. Zurich illustrates a cantonal regime distinguishing cantonal-authority cases from municipal cases; it is not a uniform national administrative rule. Those pages do not establish the current Fedlex consolidation or an individual authorization, and the Advanced label does not determine programme inclusion.

Identify canton, authorization, wastewater type and applicable OEaux version.
The inventory label Advanced does not determine applicability of the micropollutant framework.
Check the canton and applicable Fedlex version; the Zurich example is not extended across Switzerland and does not equate sewer discharge with discharge to waters.

FOEN · Water: Acts and ordinancesReference portal · CH; catálogo federal de bases jurídicas
FOEN · tratamiento de aguas residuales comunalesOfficial guidance · CH; contexto general, no criterio por instalación
Fedlex · portal de OEaux/WPO814.201Reference portal · CH; consolidación vigente pendiente
Cantón de Zúrich · autorizaciones de aguas residualesOfficial guidance · Ejemplo cantonal; referencias GSchG 814.20 y GSchV/OEaux 814.201, sin consolidación federal acreditada

References reviewed: 2026-11-06. Individual applicability: undetermined. This profile does not establish authorization or compliance.