The chlorination of the North Platte water system ended on Tuesday, Dec. 17, more than fourth months after the most recent round of chlorination began in early August.
The chlorination was a necessary precaution as a new water main was installed on about 25 blocks of West Ninth St., from Jeffers to Buffalo Bill Ave., plus another 6 blocks or so on N. Adams St., from 9th to Madison Middle School.
Water tests showed higher than anticipated levels of coliform, suspected to be caused by dirt in the new water main.
Coliform, a precursor to e-coli bacteria, is carefully monitored. No e-coli bacteria was present in the water system. Coliform itself is not harmful or hazardous and naturally occurs in water, air and soil. Allowable coliform levels are set by the U.S. Environmental Protection Agency. The tolerable level was tightened in 2016, making samples more likely to trigger mandatory chlorination.
City Water Protection Specialist Derek Thompson said state tests and inspections are clear now.
Although chlorination has ended, residents may notice residual amounts of chlorine in the water for a few more days. The need for future chlorination can't be ruled out. Coliform has been detected in the city water off and on for 30 years or more, officials say. The department will issue a public notice if chlorination is needed and or required by the state in the future.
If you have questions or concerns, contact the water department at (308)-535-6740, ext. 6,