Table. Summary of Facility-Specific Wastewater SARS-CoV-2 Loads for 2 Consecutive 8-Month Time Periods, September 1, 2020, to December 31, 2021^a.

Facility	Population	Proportion of total, %	Flow rate, mg/d	September 1, 2020, to April 30, 2021			May 1 to December 31, 2021			Site total
				Viral load, gc	Site total, %	Period total, %	Viral Load, gc	Site total, %	Period total, %	Viral load, gc
Before tourism adjustment
1	872 009	39	100	6.33 × 1016	32	41	1.36 × 1017	68	62	1.99 × 1017
2	757 418	34	42	4.55 × 1016	54	30	3.83 × 1016	46	17	8.39 × 1016
3	255 008	11	20	1.68 × 1016	52	11	1.53 × 1016	48	7	3.21 × 1016
4	86 330	4	5	1.24 × 1015	34	1	2.39 × 1015	66	1	3.63 × 1015
5	133 977	6	15	1.43 × 1016	44	9	1.86 × 1016	56	8	3.30 × 1016
6	114 532	5	6	1.11 × 1016	59	7	7.64 × 1015	41	3	1.87 × 1016
7b	16 399	1	0.8	4.42 × 1014	38	0	7.10 × 1014	62	0	1.15 × 1015
Total	2 235 673	100	188.8	1.53 × 1017	41	100	2.19 × 1017	59	100	3.72 × 1017
After tourism adjustment
1	872 009	39	100	5.45 × 1016	50	38	5.45 × 1016	50	40	1.09 × 1017
2	757 418	34	42	4.55 × 1016	54	32	3.83 × 1016	46	28	8.39 × 1016
3	255 008	11	20	1.68 × 1016	52	12	1.53 × 1016	48	11	3.21 × 1016
4	86 330	4	5	1.24 × 1015	34	1	2.39 × 1015	66	2	3.63 × 1015
5	133 977	6	15	1.43 × 1016	44	10	1.86 × 1016	56	14	3.30 × 1016
6	114 532	5	6	1.11 × 1016	59	8	7.64 × 1015	41	6	1.87 × 1016
7	16 399	1	0.8	4.42 × 1014	38	0	7.10 × 1014	62	1	1.15 × 1015
Total	2 235 673	100	188.8	1.44 × 1017	51	100	1.37 × 1017	49	100	2.81 × 1017

Abbreviations: gc, gene copies; mg/d, million gallons per day.

^a Facility 1 receives flows from the Las Vegas Strip, and facilities 2 and 3 are the 2 most similar sewersheds in terms of population and infection burden. After the tourism adjustment, the relative site totals for facility 1 were more closely aligned with facilities 2 and 3 (ie, approximately 50% in each time period), and the relative viral loads by facility were more closely aligned with the population breakdown.

^b For period 1, facility 7 monitoring started on December 14, 2020 (ie, excludes first 3.5 months of time period).