Areas of north Norman may smell, taste elevated levels of chlorine

Precautionary measures being taken due to recent water testing results

In routine water testing this week, results indicated the findings of positive total coliform in areas of Norman, north of Robinson and east of I-35. Additional testing showed no presence of E. Coli. No action is asked of the public at this time. Staff has taken immediate action, in coordination with the Oklahoma Department of Environmental Quality (ODEQ), to correct the situation by way of sending additional chloramine residual through impacted areas and flushing lines. As an additional precautionary measure, water sampling tests are ongoing to ensure adequate levels of chloramine reach impacted areas. As a result of this situation, homes and businesses in the impacted area may smell or taste elevated levels of chlorine.

The cause of this incident is under investigation. At this time, the cause is believed to be infrastructure work that has been carried out by a private company. Coliform bacteria is found in soil and surface water, and may often enter a water supply through the construction of new waterlines. While not immediately harmful, it can create a potential pathway for more dangerous bacteria.

The impacted area is generally fed from public water wells that have little to no chlorine residual, in comparison to other water sources: Lake Thunderbird water treated at the Vernon Campbell Water Treatment Plant and Lake Stanley Draper water piped in from Oklahoma City. The construction of a voter-approved Groundwater Treatment Plant, set to go to bid in Spring 2026, will ensure chloramine is added to well water in compliance with industry standards to further strengthen the public water supply for Norman.

The Norman Utilities Authority appreciates the support and patience of water customers as this situation is worked through.

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