This picture is of the remains of a bathhouse in Pompeii.  

Santini, Loretta.  Pompeii and the Villa of the Mysteries.  Narni, Italia: Casa Editrice Plurigraf, 2000. 

Sanitation

     All Roman cities needed a clean running water supply.  Aqueducts were built to transport water to a reservoir.  Inner layers of aqueducts were paved with varying materials allowing smooth water passage.  

     The reservoir was always located at the highest point in the city allowing water to be channeled down to fountains.  On average two fountains were present for every insulae.  Water was also channeled to public bathhouses where Romans washed and relaxed.  Villas had a more direct supply of water and many had private bathing facilities. 

     Sewers systems found were built under the cities roads to transport waste out of the city. 

This picture is also of the ruins of a bathhouse in Pompeii. 

Santini, Loretta.  Pompeii and the Villa of the Mysteries.  Narni, Italia: Casa Editrice Plurigraf, 2000.