From March 2 to March 30, 2026, Anna, TX residents may notice a stronger chlorine taste or odor in their tap water as the North Texas Municipal Water District (NTMWD) temporarily switches from chloramine to chlorine-only disinfection.
The switch is part of NTMWD's annual water system maintenance, a routine the district has performed for more than 15 years. Chloramine — a disinfectant made by combining chlorine and ammonia — is NTMWD's standard treatment method. Each year, however, the district pauses chloramine use ahead of warmer months when rising temperatures can accelerate bacterial growth inside water distribution lines. The temporary switch to free chlorine helps flush and reset the system.
The U.S. Environmental Protection Agency recommends this practice for water systems that use chloramines. NTMWD confirmed the water will continue to meet all state and federal water quality standards throughout the maintenance window, despite any change in taste or smell.
Anna residents may also observe fire hydrant flushing in their neighborhoods during this period. NTMWD uses hydrant flushing to push water through the system more quickly, reducing the time chlorine-treated water sits in pipes and helping ensure consistent water quality across the distribution network.
For those sensitive to the taste or odor change, NTMWD recommends two simple steps: refrigerate tap water overnight before drinking, or add a slice of citrus to a pitcher of water. Both methods allow dissolved chlorine to dissipate or mask the taste without requiring a filter purchase.
Kidney dialysis patients and fish or aquatic animal owners should take note: chloramine and chlorine affect these uses differently, and water treatment requirements may change during the switchover period. NTMWD advises those groups to consult their medical provider or equipment supplier for guidance specific to the maintenance window.
Full water quality reports and a FAQ addressing the disinfectant change are available at the North Texas Municipal Water District's official website. The maintenance period ends March 30, 2026, after which NTMWD will return to standard chloramine disinfection.
Frequently Asked Questions
Is Anna, TX tap water safe to drink between March 2 and March 30, 2026?
Yes. NTMWD confirmed the water meets all state and federal water quality standards throughout the March 2–30 maintenance period, despite the stronger chlorine taste or odor.
Why are Anna fire hydrants being flushed in March 2026?
NTMWD uses hydrant flushing during the March 2–30 maintenance window to move chlorine-treated water through distribution lines faster and maintain consistent water quality.
How can Anna residents reduce the chlorine taste in their tap water during the March 2026 switchover?
NTMWD recommends refrigerating tap water overnight or adding a slice of citrus to a pitcher of water — both allow dissolved chlorine to dissipate or become less noticeable.
How long has NTMWD performed this annual disinfectant change affecting Anna, TX?
NTMWD has conducted this annual chloramine-to-chlorine maintenance switchover for more than 15 years, and it is recommended by the U.S. Environmental Protection Agency.
Where can Anna residents find NTMWD water quality reports for the March 2026 maintenance period?
Water quality reports and a FAQ are available on the North Texas Municipal Water District's official website at ntmwd.com.