Table 3.

Concentration of NoV GI and GII in solid sludge

Month	Concn (range; genomic copies/kg) of NoV ina:
	GI	GII
November	2.6 × 108-≤2 × 104	≤2 × 104-≤2 × 104
December	≤2 × 104-NC	≤2 × 104-NC
January	6.9 × 108-8.4 × 106	9.0 × 107-2.7 × 108
February	1.1 × 108-NC	6.2 × 107-NC
March	5.6 × 108-NC	9.0 × 108-NC
April	3.1 × 105-2.4 × 106	1.0 × 106-4.3 × 106
May	1.1 × 107-1.8 × 108	8.6 × 107-8.1 × 105
June	8.0 × 108	7.9 × 108

^aNC, sample not collected.