News post

To maintain the effectiveness of Round Rock’s water distribution system, the City will temporarily change its water disinfectant from chloramine (a combination of chlorine and ammonia) to free chlorine for approximately one month, from Aug. 3-31, 2026.

During conversions, customers may notice a chlorine-like taste or smell in your water. This is normal. The water will remain safe to drink, bathe in and use for everyday purposes, including watering plants.

Why Is This Needed?

State and federal regulations require Texas cities to maintain proper levels of disinfectant in public water systems to protect against harmful bacteria and viruses.

While chloramine is effective for long-term treatment, it can lose strength in warmer months or in complex systems. To prevent this, the City periodically will switch to free chlorine, a more aggressive disinfectant, to help:

• Clear out buildup in pipes that can reduce disinfection effectiveness

• Prevent bacteria growth that can occur during long-term chloramine use

• Ensure disinfectant reaches all parts of the system — even low-flow or dead-end areas

This practice is considered an industry best practice and is recommended by the Texas Commission on Environmental Quality (TCEQ) and Environmental Protection Agency (EPA).

What to Expect

• You may notice a stronger chlorine smell or taste, similar to swimming pool water

• Water will remain safe for drinking (including for most pets), bathing and watering plants

• Some areas may experience cloudy or discolored water due to hydrant flushing

What to Do If You Notice Changes

If you notice a change in taste, smell, or water clarity:

• Taste or odor? Store tap water in an open container in the fridge to let chlorine dissipate. Carbon filters also help.

• Cloudy or discolored water? Run cold water (preferably from a bathtub or outdoor faucet) for several minutes.

• Laundry tip: If water appears discolored, wait to wash clothes to avoid staining — especially during May 27–29.

If discoloration doesn’t clear within an hour, https://iframe.publicstuff.com/#?client_id=784&request_type_id=33016submit a Water Quality Service Request.

Hydrant Flushing

Public Works crews will flush targeted hydrants throughout the month to move disinfected water through the system and maintain water quality.

Thanks to higher water usage during summer, less flushing is needed. Outdoor watering naturally increases flow through the system, making the rinse more efficient and conserving water during drought conditions.

Special Notes for Sensitive Uses

Dialysis Patients

Dialysis providers have been notified. Treatment systems will need to adjust to remove free chlorine instead of chloramines.

Aquariums

Water should be treated with a conditioner that removes both chlorine and chloramines. Most standard aquarium dechlorinators handle both.

Pool and Hot Tub Owners

No changes are needed. Continue routine maintenance and maintain proper chlorine levels.