Table 1.

The effect of pre-filtration on SARS-CoV-2 and PMMoV^a RNA detection from untreated wastewater^b, ^c.

Sample type	Pre-filtrationd	PMMoV RNA concentratione (log10 copies/L)	SARS-CoV-2 RNA concentratione (log10 copies/L)
			CDC-N1	CDC-N2
Influent 1	+	6.96 ± 0.60	3.09	N.D.f
	−	7.35 ± 0.10	5.20 ± 0.19	5.05 ± 0.17
Influent 2	+	6.14 ± 0.28	3.73 ± 0.39	3.86 ± 0.10
	−	7.15 ± 0.22	5.44 ± 0.38	5.24 ± 0.27

^aPMMoV, pepper mild mottle virus.

^bAll wastewater samples were collected on October 27, 2020.

^cTriplicate wastewater samples (n = 3) were analyzed for each condition.

^d+, sample processed with pre-filtration; −, sample processed without pre-filtration.

^eWhen SARS-CoV-2 RNA was detected from all samples (n = 3), standard deviations (SD) were calculated. The values are indicated as mean ± SD.

^fN.D., not detected.