Aqua Tepula

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Route of acqueduct Aquae planlatium 2a.png
Route of acqueduct
Map of Rome with Aqua Tepula (red) Aqua tepula planrome.PNG
Map of Rome with Aqua Tepula (red)

The Aqua Tepula is an ancient Roman aqueduct completed in 125 BC by censors Gnaeus Servilius Caepio (consul 141 BC) and L. Cassius Longinus.


The water from the Aqua Tepula was, as implied in the name, lukewarm at 16-17 degrees at the springs and perhaps due to the sulphurous content was, as Frontinus states, originally not fit for human consumption.

The original daily flow was very low and barely reached 190 quinaries (about 8000 m3 per day).


The stone arches and channel of the Aqua Marcia (140 BC), with the brick Aqua Julia (125 BC) and minor brick remains of the Aqua Tepula (33 BC) on top, near Romavecchia, Via Lemonia Aqua Marcia 06.jpg
The stone arches and channel of the Aqua Marcia (140 BC), with the brick Aqua Julia (125 BC) and minor brick remains of the Aqua Tepula (33 BC) on top, near Romavecchia, Via Lemonia
Aqua Marcia 09.jpg

Its source was at the volcanic area of the Alban hills on the estate of Lucullus, [1] between today's municipalities of Grottaferrata and Marino, a mere 18 km from Rome.

Until the Augustan era the aqueduct flowed along an underground route from source to terminus.

In 33 BC Agrippa modified the aqueduct concurrently with the construction of the Aqua Julia and added 92 quinaries of water flow from the Julia. The conduit was made to join the newly built one for Julia until it reached the current locality of Capannelle near the Aqua Marcia where there was a limaria pool (settling basin) and by which time the water had cooled.

The water was then split again (for an unexplained reason) into two conduits for the Tepula and the Julia, the Tepula being the highest, superimposed on arches of the Marcia, for the remaining 10 km. They reached the city at ad spem veterem, near Porta Maggiore.

From here on the conduit used the Aurelian walls and crossed via Tiburtina on an arch which became Porta Tiburtina. The route passed the Viminal gate, where Termini Station stands today, and ended near the Porta Collina, where the main distribution castellum was, near the current via XX Settembre. It passed through 14 castella divisorum delivering water to four regions. [2]

Later another 163 quinaries of water, [3] derived from the future Anio Novus aqueduct (built around 50 AD), were added at the horti Epaphroditiani on the Esquiline hill for a final overall total, upon distribution, of 445 (190+92+163) quinaries (18,467 m3, about 200 litres per second), still a scant amount in Roman times.

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  1. Frontinus, de aq. 2.8
  2. Frontinus, de aq. 2.82
  3. Frontinus, de aq. ii. 68

Coordinates: 41°53′20″N12°27′11″E / 41.888976°N 12.453132°E / 41.888976; 12.453132