Water, Waste and Living Conditions in Venice

Venice stood amid salt water but needed fresh water for drinking, cooking and work. Before piped supplies, residents relied on rainwater captured in cisterns and on river water carried across the lagoon. The cistern network depended on public squares, private courtyards, skilled construction and regulation. Mainland settlements and overseas possessions had different water landscapes; this account concerns the lagoon city.

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How a Venetian cistern filtered rain

The stone or marble well-head visible in a square covered an underground cistern. Builders excavated a basin below the normal high-tide level, lined its walls and floor with thick impermeable clay, and filled it with sand brought from the Lido. The central well-shaft used permeable bricks and mortar so water could gather there after filtering through the sand.

Sloped paving around the well-head directed rain through gully holes into underground brick galleries, then through the sand and toward the shaft. This system removed larger particles and separated stored water from the brackish groundwater. Public squares supplied large catchment areas; household cisterns used roofs, courtyards or both. From the sixteenth century, some multi-unit rental buildings incorporated cisterns beneath the building and fed them from roof gutters.

Public access and water brought from the mainland

Rain alone did not always refill the cisterns. Watermen carried fresh water from the Brenta River near Fusina in flat-bottomed barges called burchi and sold it in Venice. Their guild was recognized in 1471. In the fifteenth century, diarist Marin Sanudo remarked that the city had wells in its parishes and houses but that drought could empty them; barges then brought river water to refill the well galleries.

Public cisterns and private ones gave residents different access. Parish heads held keys to public cisterns and opened them twice daily, announced by bells. Water carriers could sell water by the bucket to households and workplaces. Tradesmen were prohibited from drawing from public cisterns intended for domestic use, although separate arrangements supplied industrial needs. Wealthier households, convents and palaces could maintain private cisterns, while residents without one depended more on public access or purchased water.

Maintenance, tides and oversight

Construction and repair demanded specialized work. Well-makers dug and maintained the basins, masons built the brick galleries, bargemen brought sand, and stonecutters shaped the well-heads. Parish sweepers kept paving and drainage holes clear. During exceptionally high tides, workers could plug the drains with clay to limit salt water and refuse entering the cisterns.

When floodwater contaminated a cistern, it had to be pumped out and the surrounding sand repeatedly flushed because salt lingered there and filtered back into the shaft. During drought, clay linings could crack, making river-water top-ups necessary for both supply and the structure. From 1480, the city’s public-works commissioners, the Provveditori di Comun, oversaw cistern construction and repair. Health officials monitored water quality, while the Magistrato alle Acque, or Water Magistracy, managed the lagoon and its canals.

Canals, refuse and changing regulation

Canals carried boats and drained water, while workers cleared rubbish and sediment from canals and streets. Regulations addressed dumping: a 1536 decree imposed a heavier fine for throwing refuse into canals than into streets. In 1533, the Senate raised money for canal excavation through a tax on public officials and legal professionals.

During the plague of 1575–1577, Venetian authorities cleaned wells and addressed polluted water as part of the city’s sanitation response.