Coliform bacteria found in GVID water
KINGMAN - Golden Valley residents can drink their water without worry. Mohave County sent out letters on Thursday to residents in the Golden Valley Improvement District concerning drinking water contaminants.
"We routinely monitor for drinking water contaminants," said Eric Nelson, Mohave County engineering manager of water systems. "We took 10 samples to test for the presence of coliform bacteria during August. Two samples showed the presence of total coliform bacteria. The standard is no more than one sample per month may have the presence of total coliform bacteria."
The bacteria are naturally present in the environment, he said. "It's in the dirt. It's in the air. It can be an indicator that other potentially harmful bacterial may be present ..." such as fecal coliform or E. Coli. More tests were immediately run, but no harmful bacterial were found, he said.
The two positive samples were taken on Aug. 4. On Aug. 5, the county's lab in Bullhead City returned results that showed one of the samples was positive for total coliform bacteria, but had no positive results for E. Coli or fecal coliform.
On Aug. 6, the county chlorinated the tank, flushed the system and then took three more samples - one at the same spot as the negative sample, one upstream and one downstream from the system.
On Aug. 7, the county received results that showed upstream and downstream sites were good, but the original site came back with another positive result, but also showed that the chlorine had not had enough time to reach to the original site.
The county chlorinated and flushed the system again on Aug. 11, and took three new samples. Those came back with no contaminates.
"We have tested the system since that time and everything is coming back good," Nelson said.
"We take our sampling here very seriously," he said. "This time harmful agents were not there. By law we, rightfully, have to inform the public. If there was a danger to the public, that water would have been shut off."