Results of Coliform Analysis
Not Detected
- No coliform organisms were detected in the water
sample. The sample meets the state drinking water
standard for bacteriological quality at the time of
sampling. (Similar results may be reported as negative,
absent, or zero, "0".)
Positive
- Coliform organisms were present in the water sample.
Safety can't be assured. Collection of a resample to
confirm the original result is recommended. An
investigation into the cause of the problem by a
qualified individual is advised. (Similar results may be
reported as present or any number from 1 to 200.)
Fecal
Coliform Detected - Fecal coliform organisms
were detected in the water sample. Fecal organisms are
found in the intestines of warm blooded animals, and, as
such, their presence in a water supply is considered an
indication of sewage contamination. Precautions are
recommended in the use of the water supply.
Sample more
than 30 hours old when received at the laboratory
- Coliform organisms may die between sample collection
and testing, or other bacteria may grow causing
interference. If the time between sample collection and
testing exceeds the above time limits, test results
should not be considered accurate, and a check sample is
recommended
Coliform and Nitrates - interpreting Test results
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