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The managed aqueduct

The following table shows the main purification plants, which feed water into the civil water mains managed by Hera (over 904,000 cubic metres of water per day, 78% of all the water fed into the mains).


Main plants where water supplied by Hera is purified (2018)
NameSource typeTreatment1MunicipalityProv.Avge prod (m3/day)
Val di Setta potability treatment plantsurface (Setta stream)b 1Sasso MarconiBO89,970
San Vitale wellsaquiferb 1Calderara di RenoBO44,016
Tiro a Segno wellsaquiferc 1BolognaBO31,596
Borgo Panigale wellsaquifera 1BolognaBO29,885
Imola wellsaquifera 1ImolaBO14,432
Mirandola wellsaquifera 1San Lazzaro di SavenaBO8,916
Castel San Pietro potability treatment plantsurface (Bubano reservoirs)c 1Castel San Pietro TermeBO8,498
San Giovanni in Persiceto wellsaquiferb 2San Giovanni in PersicetoBO7,127
Fossolo wellsaquiferc 1BolognaBO5,628
Suviana damsurface (Suviana reservoir)b 1Castel di CasioBO4,975
Bubano reservoirs 2surface (Bubano reservoirs)c 1MordanoBO2,389
Borgo Tossignano potability treatment plantsurface (Santerno river)c 1Borgo TossignanoBO2,232
Ridracoli dam 3surface (Ridracoli reservoir)b 1Santa SofiaFC115,817
Cesena wells 4aquifera 1CesenaFC18,883
Forlì wells 4aquiferb 1ForlìFC17,405
Pontelagoscuro potability treatment plantsurface (River Po)c 1FerraraFE69,866
Stellata wellsaquiferb 1BondenoFE9,241
Marzaglia wellsaquifera 1ModenaMO32,910
San Cesario wellsaquifera 2San Cesario sul PanaroMO21,114
Tommaselli wellsaquifera 1FormigineMO18,233
Santa Cecilia wellsaquifera 1SassuoloMO12,112
Cognento wellsaquifera 1ModenaMO11,652
Castelfranco wellsaquifera 2Castelfranco EmiliaMO7,505
Castellaro wellsaquifera 1SpilambertoMO4,236
Scoltenna potability treatment plantsurface (Scoltenna stream)b 2Pavullo sul FrignanoMO1,807
San Francesco potability treatment plantsurface (River Matauro)c 1SaltaraPU45,285
Borgheria potability treatment plantwellsb 2PesaroPU2,531
Pole Treatment Plantsurface (Burano stream)c 1CagliPU1,725
Mercatale potability treatment plantsurface (River Foglia)c 2SassocorvaroPU1,199
NIP potability treatment plant 4surface 6c 1RavennaRA46,686
Standiana potability treatment plant5surface (River Po)c 1RavennaRA34,728
Castel Bolognese wellsaquiferb 2Castel BologneseRA3,520
Conselice potability treatment plantsurface (River Po)c 1ConseliceRA2,810
Massa Lombarda wellsaquiferb 2Massa LombardaRA2,056
Monte Fortino potability treatment plantsurface (Senio stream)c 2Casola ValsenioRA1,252
Campana wells 4aquiferb 1RiminiRN16,588
Anello Nord wells 4aquifera 1RiminiRN13,157
Raggera wells 4aquiferb 1RiminiRN12,210
Polveriera wells 4aquifera 1RiminiRN9,158
Senatello potability treatment plantspringa 1CasteldelciRN3,744
Conca dam 4surface (Conca basin)c 1Misano AdriaticoRN2,121
Randaccio wellsaquifera 2Duino AurisinaTS108,000
Boscochiaro potability treatment plantsurface (Adige river)b 1CavarzereVE7,292

1 The treatment type is identified in the table by the following codes:
b = normal physical and chemical treatment and disinfectio
a = simple physical treatment and/or disinfection
1 The treatment type is indicated in the table with the following codes:
a = simple physical treatment and/or disinfection
b = normal physical and chemical treatment and disinfection
c = advanced physical and chemical treatment with refinement and disinfection
1 = Chlorine dioxide-based disinfection
2 = Sodium hypochlorite-based disinfection
2 The plant produces industrial mains water, a part of which is purified and fed into the civil mains supply. Indicated values refer only to the portion sent for purification
3 The Santa Sofia purification plant where water from the Ridracoli reservoir is treated has been managed by Romagna Acque-Società delle Fonti since its construction
4 Plants managed by Romagna Acque - Società delle Fonti since 1st January 2009
5 The Ravenna Standiana purification plant is managed by Romagna Acque-Società delle Fonti and came on line in September 2015
6 River Reno, River Lamone, River Po via the Emiliano Romagnolo canal

Water treatment methods depend on the quality of the source water

The treatment processes may include simple disinfection or more complex methods depending on the quality of the source water. In general, complex treatment processes are most common: in the Ferrara and Ravenna areas all purification processes are complex because surface water - which is vulnerable to accidental pollution - is the main source. Modena, Rimini and Padua, instead, generally draw their supplies from aquifers which have, at source, characteristics which nearly always only require simple disinfection.


Water fed into civil water mains by treatment type (2018)
 Disinfection onlyDisinfection and other treatementsTotal
Prov. Bologna12%88%100%
Prov. Ferrara0%100%100%
Prov. Forlì-Cesena7%93%100%
Prov. Modena99%1%100%
Prov. Padua93%7%100%
Prov. Pesaro-Urbino34%66%100%
Prov. Ravenna2%98%100%
Prov. Rimini56%44%100%
Prov. Trieste3%97%100%