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
PULLYCH_WWTP_559000	40,000 population equivalent (p.e.)	2022
KAISTENCH_WWTP_416900	39,509 population equivalent (p.e.)	2022
INTERLAKENCH_WWTP_059300	39,500 population equivalent (p.e.)	2022
Schmerikon - OberseeCH_WWTP_333800	39,000 population equivalent (p.e.)	2022
OENSINGEN(FALKENSTEIN)CH_WWTP_240700	38,500 population equivalent (p.e.)	2022
NIEDERGLATT(FISCHB.-GL.)CH_WWTP_008901	37,750 population equivalent (p.e.)	2022
UNTERMARCHCH_WWTP_134400	37,750 population equivalent (p.e.)	2022
Vacallo (Chiasso)CH_WWTP_526800	37,500 population equivalent (p.e.)	2022
ORBECH_WWTP_575700	37,500 population equivalent (p.e.)	2022
PENSIER (AESC)CH_WWTP_224300	37,500 population equivalent (p.e.)	2022
WETZIKONCH_WWTP_012101	37,000 population equivalent (p.e.)	2022
STANS(ROTZWINKEL)CH_WWTP_150900	37,000 population equivalent (p.e.)	2022
GomsCH_WWTP_605700	36,167 population equivalent (p.e.)	2022
HORGENCH_WWTP_013301	36,000 population equivalent (p.e.)	2022
Kirchberg - BazenheidCH_WWTP_339200	35,100 population equivalent (p.e.)	2022
LandquartCH_WWTP_395501	35,000 population equivalent (p.e.)	2022
GLANDCH_WWTP_572100	35,000 population equivalent (p.e.)	2022
SAANENCH_WWTP_084300	35,000 population equivalent (p.e.)	2022
P.-FABRIK KC inkl. GemeindeCH_WWTP_098123	35,000 population equivalent (p.e.)	2022
ROLLECH_WWTP_586100	34,250 population equivalent (p.e.)	2022
HERISAU(BACHWIS)CH_WWTP_300102	34,000 population equivalent (p.e.)	2022
MARLY (AEGN)CH_WWTP_220600	34,000 population equivalent (p.e.)	2022
MORATCH_WWTP_227400	33,500 population equivalent (p.e.)	2022
BIRMENSDORFCH_WWTP_024201	33,000 population equivalent (p.e.)	2022
ADLISWIL(SIHLTAL)CH_WWTP_026102	33,000 population equivalent (p.e.)	2022
MARIN(CHATELLENIE)CH_WWTP_645700	33,000 population equivalent (p.e.)	2022
ArosaCH_WWTP_392101	32,500 population equivalent (p.e.)	2022
Sion-ChandolineCH_WWTP_626603	32,500 population equivalent (p.e.)	2022
Flums - SeezCH_WWTP_329200	32,300 population equivalent (p.e.)	2022
COLOMBIER(LA SAUNERIE)CH_WWTP_640600	32,000 population equivalent (p.e.)	2022
KILLWANGENCH_WWTP_403000	31,654 population equivalent (p.e.)	2022
WilCH_WWTP_342500	31,083 population equivalent (p.e.)	2022
MOEHLINCH_WWTP_425400	31,018 population equivalent (p.e.)	2022
Leuk-RadetCH_WWTP_611000	30,500 population equivalent (p.e.)	2022
ARA BirsigCH_WWTP_277500	30,000 population equivalent (p.e.)	2022
UzwilCH_WWTP_340802	30,000 population equivalent (p.e.)	2022
COMMUGNYCH_WWTP_571100	30,000 population equivalent (p.e.)	2022
REGENSDORF(WUEERI)CH_WWTP_009601	30,000 population equivalent (p.e.)	2022
KUESNACHTCH_WWTP_015401	30,000 population equivalent (p.e.)	2022
MUENSINGENCH_WWTP_061600	30,000 population equivalent (p.e.)	2022
Vaz/Obervaz (Canius)CH_WWTP_350602	29,833 population equivalent (p.e.)	2022
BREMGARTENCH_WWTP_406300	29,660 population equivalent (p.e.)	2022
ARA Ergolz 1CH_WWTP_286100	28,600 population equivalent (p.e.)	2022
BASSERSDORFCH_WWTP_005201	28,000 population equivalent (p.e.)	2022
Sierre-GrangesCH_WWTP_624802	27,500 population equivalent (p.e.)	2022
LANGNAU I.E.CH_WWTP_090200	27,500 population equivalent (p.e.)	2022
BROC (AICG)CH_WWTP_212400	27,500 population equivalent (p.e.)	2022
SaastalCH_WWTP_628900	27,367 population equivalent (p.e.)	2022
THALWILCH_WWTP_014101	27,000 population equivalent (p.e.)	2022
Vétroz-ContheyCH_WWTP_602500	26,650 population equivalent (p.e.)	2022
GUERBETAL (KAUFDORF)CH_WWTP_086900	26,500 population equivalent (p.e.)	2022
MELLINGENCH_WWTP_403300	26,473 population equivalent (p.e.)	2022
Cazis (Waldau)CH_WWTP_366101	26,250 population equivalent (p.e.)	2022
NiederbürenCH_WWTP_342200	25,633 population equivalent (p.e.)	2022
GUNZGEN(GAEU)CH_WWTP_257800	25,600 population equivalent (p.e.)	2022
EINSIEDELNCH_WWTP_130101	25,585 population equivalent (p.e.)	2022
Bad RagazCH_WWTP_329100	25,500 population equivalent (p.e.)	2022
MUENCHWILEN(OB.MURGTAL)CH_WWTP_474600	25,000 population equivalent (p.e.)	2022
Barbengo (Pian Scairolo)CH_WWTP_519201	25,000 population equivalent (p.e.)	2022
AIGLECH_WWTP_540100	25,000 population equivalent (p.e.)	2022
SargansCH_WWTP_329600	25,000 population equivalent (p.e.)	2022
Schluein (Gruob)CH_WWTP_358201	25,000 population equivalent (p.e.)	2022
AFFOLTERN-ZWILLIKONCH_WWTP_000201	25,000 population equivalent (p.e.)	2022
ADELBODENCH_WWTP_056102	25,000 population equivalent (p.e.)	2022
STEP SEPECH_WWTP_680000	25,000 population equivalent (p.e.)	2022
ROMANSHORNCH_WWTP_443600	24,000 population equivalent (p.e.)	2022
BiascaCH_WWTP_528100	24,000 population equivalent (p.e.)	2022
MURG-WYNAUCH_WWTP_034500	23,500 population equivalent (p.e.)	2022
ILLNAU-EFFRETIKON(MANNENBERG)CH_WWTP_017401	22,600 population equivalent (p.e.)	2022
Val d'Anniviers-FangCH_WWTP_623300	22,500 population equivalent (p.e.)	2022
HERZOGENBUCHSEE (WANZWIL)CH_WWTP_099400	22,500 population equivalent (p.e.)	2022
Kläranlage HochdorfCH_WWTP_103100	22,500 population equivalent (p.e.)	2022
ECUBLENS (VOG)CH_WWTP_207200	22,500 population equivalent (p.e.)	2022
ROMONT (AIMPGPS)CH_WWTP_209600	22,500 population equivalent (p.e.)	2022
KOELLIKENCH_WWTP_427600	22,478 population equivalent (p.e.)	2022
HALLAU(KLETTGAU)CH_WWTP_297100	22,000 population equivalent (p.e.)	2022
Klosters-Serneus (Gulfia)CH_WWTP_387101	21,333 population equivalent (p.e.)	2022
MUENSTERLINGENCH_WWTP_469100	21,000 population equivalent (p.e.)	2022
HINWILCH_WWTP_011701	21,000 population equivalent (p.e.)	2022
OberrietCH_WWTP_325400	20,600 population equivalent (p.e.)	2022
WattwilCH_WWTP_337700	20,500 population equivalent (p.e.)	2022
ORPUNDCH_WWTP_074600	20,400 population equivalent (p.e.)	2022
SilvaplanaCH_WWTP_379001	20,000 population equivalent (p.e.)	2022
STEIN AM RHEINCH_WWTP_296400	20,000 population equivalent (p.e.)	2022
APPENZELL(BOEDELI)CH_WWTP_310100	20,000 population equivalent (p.e.)	2022
RORBASCH_WWTP_006801	20,000 population equivalent (p.e.)	2022
GRINDELWALDCH_WWTP_057600	20,000 population equivalent (p.e.)	2022
MEIRINGENCH_WWTP_078500	20,000 population equivalent (p.e.)	2022
LE LOCLECH_WWTP_643600	20,000 population equivalent (p.e.)	2022
HALLWILERSEECH_WWTP_420800	19,991 population equivalent (p.e.)	2022
KIESENTAL OBERES (KONOLFINGEN)CH_WWTP_060700	18,750 population equivalent (p.e.)	2022
ENGOLLONCH_WWTP_647600	18,700 population equivalent (p.e.)	2022
BUOCHS(AUMUEHLE)CH_WWTP_150200	18,500 population equivalent (p.e.)	2022
FISLISBACHCH_WWTP_402700	18,228 population equivalent (p.e.)	2022
FlimsCH_WWTP_373201	18,000 population equivalent (p.e.)	2022
AADORF(LUETZELMURGTAL)CH_WWTP_455100	18,000 population equivalent (p.e.)	2022
AltstättenCH_WWTP_325100	18,000 population equivalent (p.e.)	2022
RICHTERSWILCH_WWTP_013801	18,000 population equivalent (p.e.)	2022
MAENNEDORFCH_WWTP_015501	18,000 population equivalent (p.e.)	2022
Kläranlage OberseetalCH_WWTP_103300	18,000 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.