TABLE 4.

Colilert-18 results for E. coli at marine sites in 1:10- and 1:20-diluted samples compared with membrane filtration results for fecal coliforms

Estimated E. coli (Colilert) or fecal coliform (MF) no. (CFU·100 ml−1)
Testa1b2345678910
1:10 Colilert1431327,27037343713020101,467107
1:20 Colilert<20<20<2020<202020<2040<20
MF<20<20120<20<20<20<2020<20<20
  • a MF, membrane filtration.

  • b Site number.