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Current Events: Updates on Supply of Sodium Hypochlorite

Updated June 30, 2021


Westlake Chemicals, the primary supplier of sodium hypochlorite to the northwest region, was able to repair mechanical malfunctions ahead of schedule. Their production teams were up and running at full capacity beginning Wednesday, June 30. While it may take some time to adjust to the high demand, wastewater has enough supply to maintain operations through September and additional shipments are expected soon.


Updated June 18, 2021


Environmental Services was recently made aware of a potential delay to the supply of sodium hypochlorite, which is used in the Central Treatment Plant's wastewater treatment process. The delay is the result of a mechanical malfunction, which temporarily halted production at the supplier's chemical manufacturing plant in Longview. 


Currently, Environmental Services has enough supply to last several weeks and are expected to receive an additional shipment once the supplier is able to resume production, which is estimated on June 25.


Environmental Services does have alternative means of treating wastewater, but the Central Treatment Plant is designed to use sodium hypochlorite as a primary source of treatment and other methods would take time to implement.


At this time, Environmental Services feels confident in current supply levels and anticipates that the supplier will be up and running soon. While the plant is functioning properly, precautionary measures have been taken by temporarily reducing the amount of hypochlorite used in the treatment process in an effort to further extend the supply. These reductions still maintain the standards required by Environmental Services' permits.


To learn more, visit our FAQs page. To learn how these shortages may impact Tacoma Water, please click here.



Wastewater Management

Wastewater Management, part of Environmental Services, operates two wastewater treatment plants, cleans billions of gallons of wastewater each year and maintains more than 700 miles of sewer pipe.


The water that leaves your homes through sinks, showers and toilets flows through sewer pipe to a wastewater treatment plant where it is treated before being released into Commencement Bay.

Learn more about the services we provide and how we can work together to protect the environment and keep our water clean.

Wastewater Programs

The City of Tacoma recommends getting a Private Side Sewer Inspection if a building is more than 25 years old and/or does not have plastic PVC pipe running from the building to the sewer main.


Resource for Residents (and businesses, too): Is your side sewer in need of repair or replacement? Click here to learn more about the City of Tacoma's low-interest Sewer Conservation Loan Program.


For wastewater questions such as side sewer information, locations of wastewater mains and as-built information, call the City of Tacoma Environmental Services Site Development at (253) 591-5760.


Quick Links

Wastewater Services

Wastewater System

Sewer Backups and Flooding

Wastewater Rates
Permits and Manuals
Education and Involvement Opportunities
What Not to Flush

Grease Goes in the Garbage

Check the code (Municipal Code Title 12, Section 8)
Residential Flooding Brochure

For more information, call Wastewater Management at (253) 591-5588.

Contact Us

Wastewater Management
2201 Portland Avenue
Tacoma, WA 98421

Sewer Backups
24 hours a day

(253) 591-5585

Billing Questions
(253) 502-2100
8 AM - 4:30 PM

Storm Drain Flooding
24 hours a day

(253) 591-5585

Pollution Hotline

(253) 591-5000 or 311 

Sewer Conservation Loans  

(253) 502-2255

Citizens for a Healthy Bay

(253) 383-2429