Elections were held on April 3, the same day as aldermanic runoffs. Fertilizer runoffs have resulted in eutrophication, with large algal blooms and elevated bacterial levels. The OSCE sent sixty observers to monitor the election runoffs. The SCCA National Championship Runoffs has crowned Formula 500 National Champions since 1997. The first race was a demonstration event during the SCCA National Championship Runoffs. Such exceptions may include preferential voting, cumulative voting, and runoffs. The SCCA Runoffs were run at Road Atlanta that year. Verhagen is the youngest to win the SCCA National Championship Runoffs. These cars are still eligible to participate in the SCCA Runoffs. Fertilizer runoffs contributes roughly 90% of all nitrate inputs to the alluvial groundwater system. In 1998 the first Carbir was entered in the SCCA National Championship Runoffs. Also in 2004, he qualified for the SCCA Runoffs, winning multiple events. It also was a class at the SCCA National Championship Runoffs between 1991 and 1996. Bario valley has frequent flash floods because of steep mountain ranges and high surface runoffs. In 2018, the Runoffs will go back west to Sonoma Raceway.