Algae blooms have caused Columbus’s city water supply to smell bad the past two years around this time, but The Columbus Dispatch reports that the city is prepared in case it happens again this year. The city “has a contingency contract to spend $970,000 to buy powder-activated carbon,” which is “supposed to be more effective than the carbon the city purchased last year for about $600,000,” according to the article. The powdered carbon acts more quickly and “is supposed to better soak up materials that cause water to taste and smell bad.” Last year’s smell was caused by Anabaena algae’s “explosive growth in Hoover Reservoir.” Manure and fertilizer run-off into streams feed the algae blooms, while wind and temperature swings can “churn up the algae, making them difficult to remove.”  Laura Young Mohr, spokesperson for the city’s utility department, said temperature swings become a concern when higher temperatures “last for days or weeks,” but “the hope is that by late November, the likelihood of a bloom will have passed.” Columbus will also spend between $2 million and $3 million for repairs and upgrades to the Hap Cremean Water Plant “to eliminate odor and flavor problems,” but those upgrades are “about a year away.” For more, read the full article.