Strohs: Chlorination Treatment Begins Week of June 8

As a follow-up to Washington Water Service’s letter in April about the completion of construction of our new chlorination treatment plant, the Washington State Department of Health has approved the chlorination facility to go online. Washington Water expects to begin implementing treatment the week of June 8, 2026, for customers in our Strohs Water System (see map below).

You may recall that chlorine will be added to your water system on an ongoing basis to prevent the presence of coliform, which has occurred periodically and as recently as 2024, from recurring. Chlorine is a disinfectant that kills or inactivates harmful microorganisms that can potentially cause illness, and the process of chlorination protects public health. Chlorine is also added for its residual properties. Chlorine remaining in the water supply is available to fight against potential contamination in the water distribution and storage systems that might enter through leaks or pipe breakages.

The targeted chlorine residual concentration in the distribution system will be very low, at just 0.30-0.70 ppm (the federal and state maximum residual disinfectant level in drinking water is 4.0 ppm). However, if the chlorine odor or taste ever becomes overly noticeable, please do not hesitate to call our Customer Service Center.

If you have tropical fish and are concerned about chlorine in your water, please check with your local pet store for information on how to remove chlorine from the water. De-Chlor water conditioner is commonly used to remove chlorine from fish tanks.

Protecting our customers’ health and safety is our highest priority, and we are pleased that this water quality improvement project has been approved and is set to begin treating your water supply. If you need additional information, please call our Customer Service Center at (877) 408-4060, or email us at [email protected].