Rome’s Garbage Economy

Rome’s greatness is usually measured in temples, forums, and aqueducts. Its scale is better measured in the sewage, broken pottery, and worn cloth that a million-odd residents produced every day, and in the collectors and dealers who made sure almost none of it was discarded.

Historians reconstruct that population largely from the grain dole, Rome’s practice of distributing grain to citizens, first sold at a subsidized price and then, after a law passed by the tribune Clodius in 58 BC, given away free. The rolls of citizens receiving it rose and fell repeatedly under different leaders, and scholars extrapolate from that base to include the women, children, slaves, and foreigners never registered for grain, arriving at a population of a million or more by the early Empire. Bioarchaeological work on skeletal remains suggests these people were not living at bare subsistence, either: alongside grain, they ate legumes, olive oil, wine, and more meat than historians once assumed.

That volume of consumption produced a matching volume of waste. Public latrines, fed by the aqueduct network, channeled human waste into drains that reached the Cloaca Maxima, whose primary function, as the archaeologist John Hopkins has argued, was flood control rather than sanitation. A private, fee-based system ran alongside it: latrine collectors emptied household privies at night and carted the waste to the fields as fertilizer, urine was gathered separately for fullers treating cloth, and food scraps too spoiled to eat went to pigs kept even in the crowded city.

Reuse extended to nearly every material Romans handled. Metal was melted down, glass remade, broken ceramics dumped as construction fill. Textiles were graded by quality, as the tariffs in Diocletian‘s Price Edict show, down to rags still worth someone’s labor. Archaeologists studying Roman pottery, notably J. Theodore Peña, now model this as a full life cycle: manufacture, use, reuse, repair, recycle, and only then discard. The exception was oil amphorae, whose volume overwhelmed even this system: the artificial hill of Monte Testaccio, built from tens of millions of discarded olive-oil jars, exists because Rome’s recycling capacity could not keep pace with Baetican imports.

Rome’s relationship with its own debris outlasted antiquity. Ships that came to unload cargo after the fire of AD 64 were pressed into hauling burnt rubble back out to the coast, per Suetonius, while the fire of AD 80 left the travertine pavement at Largo Argentina sitting above the older stairs it buried. Flooding did quieter damage, burying the Ara Pacis under Campus Martius silt by the Severan period; centuries later, medieval Romans facing waterlogged ground near the Via Alessandrina dumped a meter and a half of debris to build on top. As the depopulated city lost its street-cleaning administration, that habit produced rubbish mounds like Testaccio’s, one of which local tradition places under Palazzo Montecitorio, though scholars trace the name to an older assembly site. Spoliation kept consuming what waste had spared: marble burned for lime, iron clamps pried from the Colosseum‘s piers. Much of what still stands in Rome today was, at some point, something else.

FURTHER READING

1. Koloski-Ostrow, Ann Olga. “Rome, Caput Mundi: Health, Hygiene, and Sanitation.” Sixty-Six Toilets and Urinals in the Ancient City of Rome: Sanitary, Urbanistic, and Social Agency, edited by Ann Olga Koloski-Ostrow et al., Peeters Publishers, 2024, pp. 191–212. JSTOR, http://www.jstor.org/stable/jj.24900056.41. Accessed 3 July 2026.
2. Koloski-Ostrow, Ann Olga. The archaeology of sanitation in Roman Italy: toilets, sewers, and water systems. UNC Press Books, 2015.
3. Peña, J. Theodore. Roman pottery in the archaeological record. Cambridge University Press, 2007.
4. BROCK, ANDREA L., et al. “On the Banks of the Tiber: Opportunity and Transformation in Early Rome.” The Journal of Roman Studies, vol. 111, 2021, pp. 1–30. JSTOR, https://www.jstor.org/stable/27128849. Accessed 3 July 2026.