Table 1. Breakdown of sample collection by city.

City estimated sewage coverage and details of the sewage treatment plants (STP) are included. MLD (Million-liter per day).

	Coimbatore	Tiruppur	Madurai
Sewage coverage	~ 7%	~17–18%	~70%
Fecal Sludge (FS) sampling	Yes	Yes	No
Biosolids sampling	Yes	No	Yes
Sewage Treatment Plant (STP)	Ukkadam	Not evaluated	Avaniyapuram (AV) and Sakki Magalam (SK)
Flow to STP (MLD)	25–30	-	20–25/10–15
Collection date	November 2016, Jan 2017	Jan 2017, July 2017, Feb-March 2018	December 2016