Depuration plants
| Sociedade de Costrucoes Soares da Costa S.A. | Oporto (Portugal) |
| Lyonnaise des Eaux SOBEP | Mazeres Lezons (France) |
| Caprari Tunisie S.A. | Ben Arou (Tunisia) |
| Industrie Chimiche Caffaro SpA | Torviscosa (UD) |
| Holst Italia SpA | Roma |
| Daneco SpA | Udine |
| Acquindustriali srl | Milano |
| Depuratore di Firenze | Firenze |
| Comune di Pistoia | Pistoia |
| Comune di Arezzo | Arezzo |
| Comune di Grado | Grado (GO) |
| Comune di Cecina | Cecina (LI) |
| Acque del Chiampo SpA | Arzignano (VI) |
| AVS Alto Vicentino Servizi SpA | Trissino (VI) |
| Water treatment plant - Porto Ercole | Porto Ercole (GR) |
| Water treatment plant - Poggibonsi | Poggibonsi (FI) |
| Water treatment plant - Gualdo di Voghiera | Gualdo di Voghiera (FE) |
| DWater treatment plant ACEA Santa Marinella Nord | Santa Marinella Nord (RM) |
| Water treatment plant - Astico | Thiene (VI) |
| Water treatment plant - Canordio di Padova | Canordio di Padova |
| Water treatment plant - Cittadella | Cittadella (PD) |
|
Water treatment plant - Campalto |
Campalto (VE) |
| Water treatment plant - Mancasale | Mancasale (RE) |
|
Water treatment plant - Servola, Trieste |
Zaule (TS) |
| Water treatment plant GISI - Cicomosciano, Casalmaggiore | Cicomosciano, Casalmaggiore (CR) |
|
Water treatment plant - Melegnano |
Melegnano (MI) |
| Water treatment plant - Roma nord | Roma |
| Water treatment plant - Terrarossa, Monte Argentario | Monte Argentario (GR) |
| Water treatment plant Cobis, Cesano - Roma | Cesano di Roma |
| Water treatment plant - Hera | Cervia (RA) |
| Water treatment plant - Cittadella | Cittadella (PD) |
| Water treatment plant - Peschiera Borromeo | Peschiera Borromeo (MI) |
| Water treatment plant - Cave | Cave (RM) |
| Water treatment plant - Merone | Merone (CO) |
| Water treatment plant - San Fior | San Fior (TV) |
| Water treatment plant - Orbetello | Orbetello (GR) |
| Water treatment plant - Ramera | Ramera (TV) |
| Water treatment plant - Abbadia Lariana | Abbadia Lariana (LC) |
| Water treatment plant - San Giuliano Milanese | San Giuliano Milanese (MI) |
| Water treatment plant - Comacchio | Comacchio (FE) |
| Water treatment plant - Oderzo | Oderzo (TV) |
| Water treatment plant - La Bassa, Brà | La Bassa, Brà (CN) |
| Water treatment plant - Barcola | Barcola (TS) |
| Water treatment plant Chiavornicco-Cordenons | Chiavornicco-Cordenons (PN) |
| Water treatment plant - Bellano | Bellano (LC) |
| Water treatment plant - Codevigo | Codevigo (PD) |
| Water treatment plant - Comacchio, Portogaribaldi | Comacchio, Portogaribaldi (FE) |
| Water treatment plant - Piano di Follo | Piano di Follo (SP) |
| Water treatment plant - Tezze sul Brenta | Tezze sul Brenta (VI) |
| Water treatment plant - Trento | Trento |
| Water treatment plant - Fonte al Bugno, Follonica-Scarlino | Follonica-Scarlino (GR) |
| Water treatment plant - Roma est | Roma est |
| Water treatment plant Tea, Mantova | Mantova |
| Water treatment plant - Tolmezzo | Tolmezzo (UD) |
| Water treatment plant - Avola | Avola (SR) |
| Water treatment plant SGR, San Giovanni Rotondo | San Giovanni Rotondo (FG) |
| Water treatment plant - San Miniato | San Miniato (PI) |
| Water treatment plant - Santa Croce sull’Arno | Santa Croce sull’Arno (PI) |
| Water treatment plant - Asti | Asti |
| Water treatment plant - Biccari | Biccari (FG) |
| Water treatment plant Aguas do Douro e Paiva, Porto | Douro e Paiva, Porto (Portugal) |
| Water treatment plant Sabadell Edar Ute, Barcellona | Barcellona (Spain) |
| Water treatment plant Oporto, Porto | Porto (Portugal) |
| Water treatment plant - Casablanca | Casablanca (Morocco) |
| Water treatment plant Quart-Benager, Valencia | Valencia (Spain) |
Municipal waterworks
| Acque del Chiampo SpA |
| Siemens Water Technologies SpA |
| Impresa Costruzioni Giuseppe Maltauro SpA |
| Acque SpA |
| Echosid Ingegneria e Impianti srl |
| Melfi srl |
| W.T.T. srl |
| Azienda Padovana Servizi SpA |
| Energia Territorio Risorse Ambientale – ETRA SpA |
| Pacifici Francesco SpA |
| AGAC SpA |
| Ladurner SpA, Acegas – APS SpA |
| S.A.G.I.DEP. SpA |
| A.C.E.A. SpA |
| Pol-tec Ambiente srl |
| Società Impianti Generali srl, Servizi Territorio e Ambiente – S.E.T.A SpA |
| DI&CI srl |
| Warex srl |
| Azienda Servizi Integrati – A.S.I. Spa, Servizi Idrici Sinistra Piave srl |
|
Acquedotto del Fiora SpA |
| Simam srl |
|
Sideridraulic System SpA |
| Sud Milanese SpA |
|
Geco srl |
| Agema srl |
| Alpe Costruzioni srl |
| Merloni – Générale des Eaux – GEIE |
| Impresa Edile Romagnosi Luca |
| C.A.D.F. SpA |
| Iteco srl |
| Il mattone srl |
| G.Toniolo Impianti e Lavori Edili soc. coop. |
| Agrotecnica Internazional srl C.M.G. srl |
| Ecomacchine Spa |
| Depuravola scarl |
| Consorzio SGR |
| Cuoio Depur SpA |
| Consorzio Aquarno |
| Consorzio Castelfranco do Sotto |
| Equilfluxo |
| Metco |
| Sociedade Costrucoes Soares da Costa S.A. |
| Fordiatec |
| Gesdepur 2002 S.L. |
Filters for treatment plants
| Sernagiotto SpA | Casteggio (PV) |
| Bertrams Dehydrat AG | Muttenz (Switzerland) |
| La Salle de Vihiers | France |
