. 2020 Nov 10;758:143578. doi: 10.1016/j.scitotenv.2020.143578

Table 2.

Summary of samples deemed positive for SARS-CoV-2 by qRT-PCR assays.

Date	WWTP^a	Total confirmed cases per 100,000 people		Efficiency of the detection process			qRT-PCR
		Ishikawa	Toyama	Concentration	RNA extraction qRT-PCR	Total	CDCN2	CDCN3	NIID
				%	%	%	copies/L^b
March 19	A	0.4	0.0	260	72	190	Neg.	Pos.	Neg.
March 27	B	0.5	0.0	76	50	38	Neg.	Pos.	Neg.
April 3	D	1.4	0.8	130	100	130	Pos.	Pos.	Pos.
April 16	B	12.2	5.1	10	49	4.9	Pos.	Neg.	Neg.
April 21	C	15.7	10.9	88	41	36	Neg.	Pos.	Neg.
April 23	B	17.4	11.0	36	50	18	Neg.	Pos.	Neg.
April 24	D	18.9	14.3	52	31	16	Neg.	Neg.	Pos.
April 30	A	21.9	18.1	41	190	76	Pos.	1.2 × 10⁴	1.3 × 10⁴
April 30	B	21.9	18.1	43	190	82	Pos.	1.2 × 10⁴	Neg.
May 1	D	22.0	19.2	49	120	60	Pos.	Pos.	Neg.
May 7	A	23.7	20.9	45	120	52	1.8 × 10⁴	Neg.	Neg.
May 7	B	23.7	20.9	110	110	120	Pos.	Pos.	Pos.
May 8	D	24.1	21.0	170	190	310	Pos.	Neg.	Neg.
May 14	A	24.8	21.1	17	130	22	Pos.	Pos.	Neg.
May 15	D	24.8	21.3	40	170	67	Pos.	Neg.	Neg.
May 15	E	24.8	21.3	42	130	57	Neg.	3.5 × 10⁴	Neg.
May 21	B	25.4	21.6	31	130	40	Neg.	Pos.	Neg.
May 22	D	25.5	21.6	25	170	42	Pos.	Pos.	Neg.
May 22	E	25.5	21.6	33	130	44	Pos.	Pos.	Neg.
May 28	A	25.9	21.6	27	120	31	Neg.	Pos.	Neg.
May 29	D	26.0	21.6	26	56	14	Neg.	Pos.	Neg.

WWTPs A, B, and C were located in Ishikawa prefecture, while D and E were located in Toyama prefecture.

Quantification was done only if the detected SARS-CoV-2 RNA concentration was >1.0 × 10¹ copies/reaction. Pos.: Positive with a detected concentration of 1.0 × 10⁰–1.0 × 10¹ copies/reaction; Neg.: Negative.