Table 1 –Acceptance Criteria for Testing New Watermains

Test Procedure	Acceptance Value^1
Total Coliforms	<1CFU / 100 millilitre
E.coli (escherichia coli)	<1 CFU / 100 millilitre
Faecal coliforms	<1 CFU / 100 millilitre
Background Bacteria^1	≤ 5 CFU /100 millilitre
Heterotrophic Plate Count^1	≤ 10 CFU/ millilitre

Notes:

1. At Town’s discretion, the acceptance value for Background Bacteria and Heterotrophic Plate Count shall be equal to or lower than the sample result from the municipal supply.

CFU = colony forming unit

Interpret <1 as equal to “zero”

Background Bacteria: general bacteria population expressed as background colony counts on the total coliform membrane filter.

Heterotrophic Plate Count: general bacteria population expressed as colony counts on a heterotrophic plate count.