Alerts customers of contaminants found, but says water safe to drink
Customers of the Apache Junction Water District are receiving communication regarding an exceedance of a compound found during routine testing of water in the district system. The water is safe to drink and no action is needed by customers.
As required, the district is reporting to the Arizona Department of Environmental Quality (ADEQ) that tests have shown a level of one group of contaminants higher than the current standard. Samples from one of the district testing sites taken on Oct. 12 resulted in a locational running annual average of 0.0862 parts per million for total trihalomethanes (TTHMs). The maximum level allowed is 0.080 parts per million (mg/l).
TTHMs are volatile organic compounds which form when disinfectants react with natural organic matter in the water. People who drink water containing excessive TTHMs over many years may experience problems with their liver, kidneys or central nervous system and could have an increased risk for cancer.
At this time, no alternative source of water is necessary. However, individuals with specific health concerns, should consult their health care providers regarding drinking water with this slightly higher compound to determine their risk.
The district will be adding pre-treatment and aeration systems to help lower TTHM levels. These modifications to the Superstition Area Water Plant and water storage facilities are anticipated to be in place by the spring of 2019.
In addition, operational changes at water reservoirs, blending TTHM-free water into the system, chemical adjustments and flushing the system at strategic locations will continue. The district will increase non-compliance monitoring, and anticipates resolving the situation prior to next year’s summer months, when hot temperatures contribute to elevated TTHM levels. Compliance sample results will be due again to ADEQ in January and April 2019. The district expects averages to drop to desired levels, during the cooler winter months, and upcoming sample results will confirm the effectiveness of system modifications.