Table 3

Samples taken from the DUWL before treatment in room 2 on 21 July 2020 and after treatment on 24 August 2020 and 22 August 2021

Dental room	Date	TC (cfu/100 mL)	FC (cfu/100 mL)	E-Coli (cfu/100 mL)	pH value (SU)	TSS (mg/L)
Room 1	20 November 2020	<1	<1	<1	7.23	3.60
Room 1	22 April 2021	<1	<1	<1	5.63	<0.45
Room 2*	21 July 2020	>5000	>1700	>500	7.35	<1.0
	24 August 2020	<1	<1	<1	7.34	<1.0
	22 April 2021	<1	<1	<1	5.58	<0.45
Room 3	20 November 2020	30	<1	<1	7.05	<1.0
Room 3	22 April 2021	<1	<1	<1	5.80	<0.45
Room 4	20 November 2020	20	<1	<1	7.11	16.0
Room 4	22 April 2021	<1	<1	<1	5.71	<0.45
Room 5	20 November 2020	60	<1	<1	7.15	19.0
Room 5	22 April 2021	<1	<1	<1	5.64	<0.45
Room 6	20 November 2020	<1	<1	<1	7.25	1.5
Room 6	22 April 2021	<1	<1	<1	5.91	<0.45
Room 7	20 November 2020	<1	<1	<1	7.29	<1.0
Room 7	22 April 2021	<1	<1	<1	5.76	<0.45
Room 8	20 November 2020	<1	<1	<1	7.14	21.0
Room 8	22 April 2021	<1	<1	<1	5.58	<0.45
Room 9	20 November 2020	15	<1	<1	7.08	10.4
Room 9	22 April 2021	<1	<1	<1	6.02	<0.45
Room 10	20 November 2020	<1	<1	<1	7.21	10.6
Room 10	22 April 2021	<1	<1	<1	5.73	<0.45
Room 11	20 November 2020	10	<1	<1	7.11	7.05
Room 11	22 April 2021	<1	<1	<1	5.68	<0.45
Room 12	20 November 2020	<1	<1	<1	6.92	5.7
Room 12	22 April 2021	<1	<1	<1	5.58	<0.45
Room 13	20 November 2020	10	<1	<1	6.96	6.7
Room 13	22 April 2021	<1	<1	<1	5.58	<0.45
Room 14	20 November 2020	10	<1	<1	7.12	9.6
Room 14	22 April 2021	<1	<1	<1	6.05	<0.45
Room 15	20 November 2020	<1	<1	<1	7.15	1.8
Room 15	22 April 2021	<1	<1	<1	5.80	<0.45
Room 16	20 November 2020	<1	<1	<1	6.91	<1.0
Room 16	22 April 2021	<1	<1	<1	5.65	<0.45
Limits SSDWQ		0	0	0	6.5–8.5	NoGL

FC, faecal coliform; SSDWQ, Sindh Standard Drinking Water Quality; TC, total coliform.