Contamination

Raw

Processed

Total

P

Concentration > 0.05 μg/l

78 (52%)

3 (8.6%)

81 (43.8%)

<0.0001

0 < Concentration < 0.05 μg/l

72 (48%)

3 (8.6%)

75 (40.5%)

Total

150 (100%)

6 (17.1%)

156(84.3%)