What are the sources of perchlorate in Anaheim’s water?
A. Extensive studies have been conducted to determine the source of perchlorate in the Orange County Groundwater Basin. The conclusion of local experts is that the perchlorate found in the Orange County Groundwater Basin is thought to have come from the Colorado River. Perchlorate has been present in the Colorado River due to past releases from defense contractor facilities. Although the contamination is mostly cleaned up today, river water has been used to help recharge the groundwater basin since the 1960s. Several investigations have been made to determine if any local sources, including fireworks shows, could have contributed to perchlorate levels in groundwater. At this time there is no evidence that any local source has caused perchlorate contamination.
