City of Calexico

CALEXICO The city of Calexico Water Treatment Plant’s water system exceeded drinking water standards for Total Trihalomethanes (TTHMs). While required to notify residents and customers of exceeding standards, the Water Treatment Plant stated the detection is neither harmful nor a reoccurring issue.

The Water Treatment Plant monitors drinking water for specific parameters on a regular basis. TTHMs are common disinfection process byproducts that form when chlorine reacts with natural organic material present in the source water. Although an increase of TTHMs was detected, the water remains safe to drink and use for cooking, bathing, and cleaning.

The city of Calexico Water Treatment Plant is evaluating the implementation of several treatment options in order to meet TTHM standard. The city is working closely with the California State Water Resources Control Board, Division of Drinking Water to resolve the issue. They anticipate resolving the issue within 12 months.

They explained it is not an emergency and customers do not need to boil water or take other actions.

The U.S. Environmental Protection Agency (EPA) and State Water Resources Control Board Division of Drinking Water have established public notification rules and tiers under which specific violations are assigned. This TTHM violation is a Tier 2 violation of the drinking water regulations. Tier 2 violations are considered less urgent than Tier 1 violations because there is little immediate risk to consumers. Tier 2 violations require a public notification delivered to customers after a violation is discovered.

For more information, please contact Jose L. Saldana, Water System Supervisor at (760)768-2160 or at the following mailing address: 549 Pierce Ave, Calexico, California.

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