TABLE 1.

Seasonal viral loads and prevalence of HAstV, NoV GI, and NoV GII in 100 effluent samples from four WWTPs

Season	No. of samples analyzed	Viral prevalence (%)			Median (range) viral load (no. of copies/liter)
		HAstV	NoV GI	NoV GII	HAstV	NoV GI	NoV GII
Spring	24	83	100	100	6.50 × 103 (0–4.87 × 105)	1.65 × 104 (4.04 × 102–1.03 × 105)	1.11 × 104 (1.69 × 101–1.12 × 105)
Summer	28	79	93	93	1.66 × 102 (0–1.04 × 104)	4.58 × 102 (0–4.88 × 103)	1.49 × 103 (0–1.13 × 104)
Autumn	24	75	100	96	2.03 × 103 (0–2.00 × 105)	3.82 × 103 (8.79 × 101–3.60 × 104)	4.40 × 103 (0–1.41 × 105)
Winter	24	96	96	100	1.09 × 105 (0–1.39 × 106)	5.09 × 104 (0–2.04 × 105)	9.58 × 104 (2.49 × 103–2.92 × 105)
Total	100	83	97	97	2.69 × 103 (0–1.39 × 106)	3.97 × 103 (0–2.04 × 105)	6.80 × 103 (0–2.92 × 105)